USPTO guide
How to respond to a 35 U.S.C. 102 rejection
By Raj Sutariya, Co-founder, PatentAssist.ai
Updated
A 102 rejection says your claim is not new: one earlier disclosure already contains everything in it. It is the most mechanical rejection in US practice, which makes it the most checkable. Either the reference has every element arranged as claimed, or it does not. And either it is prior art against your claim, or a date or an exception takes it out. This guide covers both questions, the inherency doctrine, and Rule 130 declarations. For deadlines and reply format, see the parent guide on responding to a USPTO office action.
Quick answer
- The test: a single reference must disclose each and every element, expressly or inherently, arranged as in the claim (MPEP 2131).
- Two lines of attack: the reference is missing something, or it is not prior art (dates under 102(a)(1) and (a)(2), or an exception under 102(b)).
- Your own disclosures: within 1 year of your effective filing date they can be removed with a Rule 130 declaration (37 CFR 1.130).
- Common ownership: a 102(a)(2) reference owned by the same entity is removed by a simple statement (102(b)(2)(C), MPEP 2154.02(c)).
- Inherency: the feature must necessarily be present, not merely possibly (MPEP 2112).
What the examiner must show
MPEP 2131 quotes the standard from Verdegaal Bros.: "A claim is anticipated only if each and every element as set forth in the claim is found, either expressly or inherently described, in a single prior art reference." The identical invention must be shown "in as complete detail as is contained in the ... claim" (Richardson v. Suzuki), and the elements must be arranged as the claim requires. The reference does not have to use your words (In re Bond), and the claim is read under its broadest reasonable interpretation.
Three refinements matter in practice. If the claim covers alternatives or a genus, one species in the reference anticipates the whole claim (MPEP 2131.02). A specific example inside a claimed range anticipates the range (MPEP 2131.03). And a reference is presumed enabled: once the examiner shows every element, the burden moves to you to prove it is not, unless it is non-enabling on its face (MPEP 2121). A second reference may be used only to show the first is enabled, to explain a term in it, or to show an inherent characteristic (MPEP 2131.01). If the examiner needs a second document to supply an element, the rejection belongs under 35 U.S.C. 103, and you should say so.
Is the reference prior art? AIA 102(a)(1) and (a)(2)
Applications containing a claim with an effective filing date on or after March 16, 2013 are examined under the first-inventor-to-file version of 35 U.S.C. 102. It has two categories of prior art, measured against the effective filing date of each claim, not the date you invented anything.
| Provision | What counts | Date test | Exceptions |
|---|---|---|---|
| 102(a)(1) | Anything patented, described in a printed publication, in public use, on sale, or otherwise available to the public, anywhere in the world. | Must be before the effective filing date of your claim. | 102(b)(1)(A) and (B), for disclosures 1 year or less before your effective filing date. |
| 102(a)(2) | A US patent, a published US application, or a WIPO-published PCT application designating the US, naming another inventor. | Must have been effectively filed before your effective filing date, even if published after it. Foreign priority counts (102(d)). | 102(b)(2)(A), (B) and (C), with no time limit. |
The effective filing date, claim by claim
Under 35 U.S.C. 100(i)(1), a claim's effective filing date is the earlier of the actual filing date and the filing date of the earliest application to which it is entitled to priority or benefit. Entitlement depends on that earlier application supporting the claim. A claim drafted from a provisional's text keeps the provisional date; a claim with a feature added only in the non-provisional gets the non-provisional date (MPEP 2152.01). When an examiner cites something published between your provisional and your non-provisional, check first whether the rejected claim is supported by the provisional. If it is, the reference may not be prior art at all, and the reply only needs to show the support. See the provisional application guide for why the provisional's content matters.
The same logic applies to the reference. For 102(a)(2), a US patent document counts as of its earliest priority or benefit date, but only for subject matter described in that earlier application (35 U.S.C. 102(d), MPEP 2154.01(b)). If the passage the examiner relies on first appeared in a later filing of the reference, its effective date may be after yours.
The 102(b) exceptions and how to invoke them
The exceptions in 102(b)(1) apply to 102(a)(1) art and only within the 1-year grace period. The exceptions in 102(b)(2) apply to 102(a)(2) art and have no time limit (MPEP 2153 and 2154).
| Exception | What it removes | How to invoke it |
|---|---|---|
| 102(b)(1)(A) | Your own disclosure (or one by someone who got it from you) made 1 year or less before your effective filing date. | Often apparent on its face if the authors are all named inventors (MPEP 2153.01(a)). Otherwise a Rule 130(a) declaration of attribution. |
| 102(b)(1)(B) | A third party's disclosure within the year, of subject matter you had already publicly disclosed. | Rule 130(b) declaration identifying your earlier disclosure and its date. Only the same subject matter is excepted (MPEP 2153.02). |
| 102(b)(2)(A) | A US patent document whose subject matter was obtained, directly or indirectly, from your inventor. | Rule 130(a) declaration. If the other application claims the same invention, a derivation proceeding may be the route instead (37 CFR 1.130(c)). |
| 102(b)(2)(B) | A US patent document filed after you had publicly disclosed the same subject matter. | Rule 130(b) declaration with a copy of your publication, or a detailed description if it was not a printed publication. |
| 102(b)(2)(C) | A US patent document commonly owned with your claim (or under an obligation of assignment to the same person) no later than your effective filing date. Joint research agreements count under 102(c). | A clear and conspicuous statement in the reply. No declaration needed (MPEP 2154.02(c)). |
Two traps. First, 102(b)(1)(B) and 102(b)(2)(B) protect only the same subject matter you disclosed. If a competitor publishes a variation, even an obvious one, after your disclosure, the variation remains prior art (MPEP 2153.02). Second, the grace period is a US rule. Many other offices, including the EPO, do not have a comparable general grace period, so a publication you can remove in the US may still defeat a European application.
Rule 130 declarations
37 CFR 1.130 provides two declarations. A declaration of attribution under 1.130(a) shows that a disclosure was made by the inventor or a joint inventor, or that the disclosed subject matter came from them. A declaration of prior public disclosure under 1.130(b) shows the inventor publicly disclosed the subject matter first; it must identify that subject matter and its date, and attach a copy of the publication or, for a non-printed disclosure such as a demonstration, describe it in enough detail to tell what was shown.
The most common case is a paper by the inventors plus a colleague who is not named as an inventor. The paper is not obviously inventor-originated, so the examiner may cite it (MPEP 2153.01(a)). The fix is an "unequivocal" statement from the inventor that they invented the subject matter of the paper, with a reasonable explanation of the other author's role, such as having run tests under the inventors' direction (MPEP 717.01(a)(1)). A bare statement without an explanation may not be enough if there is contrary evidence. You can head off the rejection by identifying grace-period disclosures in the specification at filing (37 CFR 1.77(b)(6)), provided the statement carries the same information a 1.130(a) declaration would.
- I, A. Inventor, am a named joint inventor of Application No. [number].
- The article by A. Inventor, B. Inventor and C. Technician, published [date], is cited against claims 1-12 under 35 U.S.C. 102(a)(1).
- The subject matter of the article relied on in the Office action (section 3 and FIG. 2) was invented by A. Inventor and B. Inventor.
- C. Technician ran the measurements in section 4 at our direction and did not contribute to the conception of the subject matter in section 3 or FIG. 2.
- The article was published less than one year before [effective filing date]. It is excepted under 35 U.S.C. 102(b)(1)(A).
Timing follows MPEP 717.01(f): the declaration is timely before a final rejection, after final only on a showing of good and sufficient reasons under 37 CFR 1.116(e), or with an RCE. Rule 130 is not available at all for a disclosure made more than one year before the effective filing date (1.130(c)), and Rule 131 antedating no longer exists for AIA applications.
Inherent anticipation
A reference can anticipate through what it necessarily contains, even if it never mentions the feature. Discovering a new property of an old composition does not make the composition new (MPEP 2112, citing Atlas Powder and In re Best). But the examiner's burden is real. That a result "may occur" is not enough (In re Rijckaert, In re Oelrich), and the examiner "must provide a basis in fact and/or technical reasoning" that the characteristic necessarily flows from the reference (Ex parte Levy). A reference that discloses a broad genus does not inherently disclose each species in it.
Once the examiner gives that reasoning, the burden of production shifts to you to show the prior art does not necessarily have the feature (MPEP 2112, subsection V). The effective answer is usually data. If you can reproduce the reference's example and show it does not produce the claimed property, or produces it only under conditions the reference does not disclose, put the test and results in a Rule 132 declaration. Argument alone rarely moves an inherency finding.
How to read the rejection
- Build a claim chart. Split the claim into elements and write the examiner's citation against each. Then read each cited passage yourself. Pin cites to a whole column or "see generally" are where errors hide.
- Check the arrangement. Elements picked from different parts or embodiments of the reference anticipate only if a skilled reader would "at once envisage" the claimed combination (Kennametal, MPEP 2131.02).
- Check the interpretation. If the examiner's reading of a term is broader than reasonable in light of your specification, say what the term means and why, citing the specification.
- Check the dates. Your claim's effective filing date, the reference's publication date for 102(a)(1), and its effective filing date for the cited passage under 102(a)(2).
- Check ownership and authors. Same assignee, or the reference names one of your inventors? An exception may apply.
- Read the whole reference. Use a US patent search to pull the full text and claims, and look at its family for earlier filing dates.
Argue or amend
Argue without amending when the chart shows a genuinely missing element, a wrong arrangement, an unreasonable interpretation, or a reference that is not prior art. These arguments are cheap and leave your claim scope intact. Amend when the reference really does disclose the claim as written. Pick a feature from your specification that the reference lacks and that does real work in the invention, because the examiner's next move will be a 103 rejection combining this reference with another. A trivial distinction wins the 102 and loses the 103.
The reference shows a valve body, a seal and a spring biasing the seal closed. Underlining marks added text.
1. (Currently amended) A check valve, comprising:
a valve body defining a flow passage;
a seal movable between an open position and a closed position;
and
a spring biasing the seal toward the closed position, wherein the spring is located outside the flow
passage and acts on the seal through a lever pivoted
on the valve body, such that fluid flowing through
the passage does not contact the spring.
Cite the support in the remarks, for example "Support appears at paragraphs [0022]-[0025] and FIG. 3."
Smith does not disclose "a spring located outside the flow passage." The Office action cites column 4, lines 10-25, but that passage describes spring 32 seated in annular groove 30, which FIG. 2 shows inside bore 18, the flow passage of Smith's valve. Nothing in Smith describes a spring outside the passage, and the Office action does not assert that this feature is inherent. Because Smith does not disclose each element of claim 1 arranged as claimed, it does not anticipate. MPEP 2131. Claims 2-9 depend from claim 1 and are not anticipated for the same reason.
Illustrations only. The reference, column numbers and paragraph numbers are invented.
Common mistakes
- Arguing that the reference does not "teach" the invention because it describes a different purpose. Anticipation turns on whether the claimed structure or steps are disclosed, not on why the reference uses them.
- Reading limitations from your specification into the claim. The examiner applies the broadest reasonable interpretation, and a feature that lives only in your description does not distinguish anything.
- Accepting an inherency finding without checking its basis. The examiner needs facts or technical reasoning that the feature necessarily flows from the reference (MPEP 2112, subsection IV).
- Trying to swear behind a reference. Under the AIA there is no Rule 131 antedating for applications whose claims have an effective filing date on or after March 16, 2013 (MPEP 2152.01).
- Filing a Rule 130 declaration for a disclosure more than a year before your effective filing date. Rule 130(c) says it is not available.
- Forgetting that a claim's effective filing date is set claim by claim. A claim with matter added after the provisional gets the later date, which can let an intervening publication in.
Many anticipation rejections are avoidable at drafting time with a set of dependent claims that step down in scope, each adding one feature that does work. See how to write patent claims. If a 102 rejection arrives alongside 101 or 112 rejections, see the guides to 101 rejections and 112 rejections.
Where PatentAssist helps
PatentAssist.ai does not draft USPTO office action responses. Its office action feature supports Indian First Examination Reports only, in beta. It helps with anticipation in two other ways. Its free prior-art search over USPTO, EPO and Indian records lets you read the cited reference and its relatives, and find art the examiner has not cited yet, before you choose an amendment. And its drafting tool writes USPTO-format claims and specifications with fallback features already described, so the amendment you need later has support.
More USPTO guides
- How to file a provisional patent application (US)
What a US provisional must contain, the USPTO fees, the 12-month deadline under 35 U.S.C. 119(e), and when to skip it.
- USPTO patent fees (2026)
Every USPTO patent fee for large, small and micro entities, from filing to maintenance, with a fee calculator.
- Patent drawing requirements: USPTO, EPO and India
37 CFR 1.84, the EPO rules that replaced Rule 46 EPC, and Indian rule 15, compared side by side.
- How to write patent claims: USPTO, EPO and India
Claim structure and worked examples, then the claim rules and fees at the USPTO, the EPO and the Indian Patent Office, side by side.
- How to respond to a USPTO office action
Reply deadlines and extension fees, 101, 102, 103 and 112 rejections, interviews, and options after a final rejection.
- Types of patent searches, and which one you need
Patentability, freedom-to-operate, invalidity and landscape searches compared by purpose, timing, scope and deliverable.
- Patentability search: how to check novelty before you file
What counts as prior art under 35 U.S.C. 102 and Art. 54 EPC, the grace period gap, search steps and how to read results.
- Freedom-to-operate search in the US and Europe
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- How to use USPTO Patent Public Search
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- Google Patents search guide
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- The Cooperative Patent Classification (CPC), explained
How CPC symbols are built, CPC against IPC, the Y section, how to find the right class and how to search it in each database.
- Patent search Boolean operators and search strings
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- How to respond to a 35 U.S.C. 101 rejection
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- How to respond to a 35 U.S.C. 103 rejection
Graham and the KSR rationales in MPEP 2143, teaching away, motivation to combine, secondary considerations with nexus, and Rule 132 evidence.
- How to respond to a 35 U.S.C. 112 rejection
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- The PCT application: timeline, fees and national phase
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- Entering the US national stage under 35 U.S.C. 371
The 30-month deadline and revival, the 371 requirements, national stage fees by entity size, and 371 versus a bypass continuation.
- The US foreign filing license (35 U.S.C. 184)
When a US-made invention needs a license to be filed abroad, the six-month rule, expedited and retroactive licenses, and the Indian and European equivalents.
- Filing a US patent from Europe or India
The 2026 US practitioner rule for foreign applicants, Paris priority and certified copies, small entity status, PCT or direct, fees and translations.
- What is a utility patent?
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- Design patents in the United States
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- How to file a nonprovisional patent application
Required parts and fees, claiming a provisional within 12 months, DOCX filing in Patent Center, and what happens after you file.
- Provisional vs nonprovisional patent application
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- How much does a patent cost?
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- How to patent an idea in the US
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- Small entity vs micro entity status
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- How long does a patent last?
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- Can AI write a patent application?
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- Restriction requirements and election of species
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- Options after a final rejection
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- Track One prioritized examination
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- 35 U.S.C., annotated: US patent law section by section
The current text of 34 key sections of Title 35 with plain-English summaries, key cases, 37 CFR rules and MPEP references.
35 U.S.C. 102 rejections: frequently asked questions
What is a 35 U.S.C. 102 rejection?
It is an anticipation rejection: the examiner says a single prior art reference discloses every element of the claim, arranged as claimed, either expressly or inherently. A claim that is anticipated is not new. The legal standard is in MPEP 2131.
What is the difference between 102(a)(1) and 102(a)(2)?
102(a)(1) covers anything publicly available before your effective filing date: patents, publications, public use, sales. 102(a)(2) covers US patents, published US applications and PCT applications designating the US, naming another inventor, that were effectively filed before your effective filing date, even if they were published afterward. Different exceptions apply to each.
How do I overcome an anticipation rejection?
Show that the reference is missing at least one claim element or does not arrange the elements as claimed, or that it is not prior art at all because of its date or a 102(b) exception. If the reference really does disclose the claim, amend to add a supported feature it lacks. Expect the examiner to answer an amendment with a 103 rejection, so choose a feature that is not an obvious variation.
What is a Rule 130 declaration?
A declaration under 37 CFR 1.130 that removes a disclosure as prior art. Under 1.130(a) you show the disclosure was made by the inventor or obtained from the inventor. Under 1.130(b) you show the inventor publicly disclosed the same subject matter before the cited disclosure. It is only available for AIA applications and not for disclosures made more than one year before the effective filing date.
Does the US still have a one-year grace period?
Yes. Under 35 U.S.C. 102(b)(1), a disclosure made 1 year or less before the effective filing date is not prior art under 102(a)(1) if the inventor made it, or if the inventor had publicly disclosed the same subject matter first. Many other offices, including the EPO, do not have a comparable general grace period, so relying on it can cost you rights abroad.
Can an examiner use inherency in a 102 rejection?
Yes. A reference anticipates if a missing feature is necessarily present in what it discloses. Probabilities or possibilities are not enough, and the examiner must give a basis in fact or technical reasoning (MPEP 2112). Once that is done, the burden shifts to you to show the prior art does not necessarily have the feature, often with test data in a Rule 132 declaration.
Can a 102 rejection use more than one reference?
Only in narrow cases. MPEP 2131.01 allows extra references to show that the primary reference is enabled, to explain the meaning of a term in it, or to show that a characteristic is inherent. If the second reference supplies a missing element, the rejection is really an obviousness rejection under 103.
Sources: 35 U.S.C. 102 and 100(i); 37 CFR 1.130 and 1.132; MPEP 717, 2112, 2121, 2131, 2152, 2153 and 2154 (Ninth Edition, Revision 01.2024). Checked October 26, 2026. This guide is general information, not legal advice. Have a registered patent attorney or agent review your reply.