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USPTO guide

What is a utility patent?

By , Co-founder and CEO, PatentAssist.ai
Updated

A utility patent is the ordinary US patent: it protects how something works, what it is made of, or how it is made. It is what most people mean by "a patent", and it covers everything from drug formulations to software methods. This guide sets out what qualifies, what goes into the application and in what order, how long the patent lasts, and what the USPTO charges.

Quick answer

  • What it covers: a new, useful and non-obvious process, machine, manufacture or composition of matter, or an improvement of one (35 U.S.C. 101).
  • The application: an application data sheet, a specification ending in claims and an abstract, drawings, and an oath or declaration from each inventor (37 CFR 1.51(b), 1.77).
  • Term: from grant until 20 years after the US filing date, plus any patent term adjustment, as long as the maintenance fees are paid (35 U.S.C. 154).
  • USPTO fees: $2,000 to file for a large entity, $730 for a small entity and $400 for a micro entity, then the issue fee and three maintenance fees.

What a utility patent covers

35 U.S.C. 101 lets anyone who "invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof" obtain a patent. Those four statutory categories are the first gate. Every claim has to fall into at least one of them.

The four statutory categories of 35 U.S.C. 101
Category Meaning Examples
Process A series of steps or acts: a method of making, using or doing something. 35 U.S.C. 100(b) defines it to include a new use of a known process, machine, manufacture or composition. A method of curing a coating by pulsing UV light at a set frequency; a method of routing delivery vehicles that cuts empty miles.
Machine A concrete thing made of parts that work together to perform a function. A drone docking station that swaps batteries; an engine control unit; a surgical stapler.
Manufacture An article made from raw or prepared materials by giving them new forms, qualities or combinations, where the article is not itself a machine. A shoe sole with a printed lattice midsole; a packaging blank; a printed circuit board.
Composition of matter A combination of two or more substances, including chemical compounds, mixtures and formulations. A polymer blend; a drug formulation; a concrete admixture.

Fitting a category is necessary but not enough. The courts exclude laws of nature, natural phenomena and abstract ideas, and the USPTO applies that exclusion through the two-step Alice/Mayo test in MPEP 2106. A claim to a mathematical formula as such fails. A claim that uses the formula to control a curing press, or that improves how a computer stores data, can pass. For software and AI inventions, the specification should explain the technical problem and the technical improvement in concrete terms, because that is what the eligibility argument will rest on later.

After eligibility come the conditions every claim must meet: novelty (35 U.S.C. 102), non-obviousness (103), and a specification that describes, enables and clearly claims the invention (112). These are what an examiner actually tests, and what most office action rejections are about.

Utility, design and plant patents

The Patent Act has three kinds of patent. Utility patents under section 101 cover function. Design patents under section 171 cover the ornamental appearance of an article. Plant patents under section 161 cover new varieties of asexually reproduced plants. One product often carries more than one: a running shoe can have utility patents on its midsole structure and a design patent on the look of its upper.

Parts of a utility patent application

A complete nonprovisional application has four things under 37 CFR 1.51(b): a specification with at least one claim, the inventor's oath or declaration, drawings where necessary, and the filing, search, examination and any size fees. 37 CFR 1.77(a) sets the order the papers should appear in:

Elements of a US utility application in 37 CFR 1.77(a) order
Element Rule Notes
1. Utility application transmittal form 37 CFR 1.77(a)(1) Optional in practice. Patent Center captures most of it.
2. Fee transmittal form 37 CFR 1.77(a)(2) Or pay online when you file.
3. Application data sheet (ADS) 37 CFR 1.76 Inventors, applicant, correspondence address, and any domestic benefit or foreign priority claims. A benefit or priority claim must be in the ADS to count.
4. Specification, including claims and abstract 35 U.S.C. 112; 37 CFR 1.71-1.77 Filed in DOCX to avoid the non-DOCX surcharge.
5. Drawings 35 U.S.C. 113; 37 CFR 1.81-1.85 Required where needed to understand the invention, which is almost always.
6. Inventor's oath or declaration 35 U.S.C. 115; 37 CFR 1.63 One per inventor. Can be postponed until allowance if an ADS names every inventor.

Specification sections, in order

37 CFR 1.77(b) lists the sections of the specification. Use the ones that apply, in this order, each under an uppercase heading without bold or underlining (1.77(c)):

  1. Title of the invention
  2. Cross-reference to related applications
  3. Statement regarding federally sponsored research or development
  4. Names of the parties to a joint research agreement
  5. Incorporation by reference of any sequence listing, large table or computer program listing filed as a text or XML file
  6. Statement regarding prior disclosures by the inventor or a joint inventor
  7. Background of the invention
  8. Brief summary of the invention
  9. Brief description of the several views of the drawing
  10. Detailed description of the invention
  11. A claim or claims
  12. Abstract of the disclosure
  13. Sequence listing filed as PDF or on paper, if any

The detailed description and the claims carry the weight. The description has to show that you possessed the claimed invention and teach a skilled reader to make and use it across the full scope of the claims (35 U.S.C. 112(a)). Anything you leave out cannot be added later: an amendment that introduces new matter is refused. The claims define what the patent covers; our guide on how to write patent claims walks through structure and common mistakes. The drawings must meet 37 CFR 1.84, covered in patent drawing requirements.

The application data sheet

The ADS (form PTO/AIA/14, or the web ADS in Patent Center) holds the bibliographic data: each inventor's legal name, residence and mailing address, the applicant, the correspondence address, the title, and any domestic benefit and foreign priority claims (37 CFR 1.76). It is technically optional, but it is required to claim the benefit of a provisional or an earlier nonprovisional, and a benefit claim that appears only in the specification does not count (1.78(a)(3) and (d)(2)). File one every time.

The oath or declaration

Each inventor signs a declaration identifying the application and stating that they believe they are an original inventor and that the application was made or authorized by them (37 CFR 1.63). They must have reviewed the application, including the claims, and be aware of the duty of disclosure. If the ADS names every inventor, the declaration can wait until the application is otherwise allowable, as long as it is in by the time the issue fee is paid (1.53(f)(3)). Filing it after the filing date costs a surcharge of $170 (small $68, micro $34) under 37 CFR 1.16(f), so most applicants file it at the start.

How long a utility patent lasts

Under 35 U.S.C. 154(a)(2), the term begins on the day the patent issues and ends 20 years from the US filing date. If the application claims the benefit of an earlier US nonprovisional or international application under section 120, 121, 365(c) or 386(c), the 20 years run from the earliest of those. Priority claims under section 119, which include claims to a provisional and to a foreign application, are not counted (154(a)(3)). So a provisional effectively adds up to a year of protection at the far end.

Patent term adjustment (154(b)) adds days lost to USPTO delay: for example, when the Office takes more than 14 months from filing to its first action, more than 4 months to answer a reply, or more than 3 years overall to issue the patent, less time consumed by an RCE and other excluded periods. Applicant delays are subtracted. A terminal disclaimer caps the term at the disclaimed date.

Three maintenance fees keep the patent alive, due at 3.5, 7.5 and 11.5 years after grant (37 CFR 1.20(e) to (g)). Each can be paid in the 6 months before its due date, or in a 6-month grace period with a surcharge. Miss that and the patent expires at 4, 8 or 12 years.

Worked example

You file a provisional on March 4, 2025 and a nonprovisional claiming it on March 3, 2026. The patent issues on June 13, 2028 with 41 days of term adjustment. The 20 years run from March 3, 2026, not from the provisional, so the base expiry is March 3, 2046, and the adjusted expiry is April 13, 2046. A continuation filed in 2029 that claims the 2026 application under section 120 expires no later than March 3, 2046 plus its own adjustment, even though it was filed three years later. The first maintenance fee window opens June 13, 2031 and the fee is due by December 13, 2031.

Utility patent cost: USPTO fees

The table shows the core USPTO fees under the schedule effective January 19, 2025. Small entities pay 60% less and micro entities 80% less; a small entity that files in Patent Center pays the micro rate on the basic filing fee. Excess claims cost extra: $600 (standard) for each independent claim over 3 and $200 for each claim over 20.

Core USPTO fees for a utility patent in US dollars
Fee 37 CFR Large Small Micro
Basic filing fee (filed in Patent Center) 1.16(a) $350 $70 $70
Search fee 1.16(k) $770 $308 $154
Examination fee 1.16(o) $880 $352 $176
Issue fee 1.18(a) $1,290 $516 $258
Maintenance fee at 3.5 years 1.20(e) $2,150 $860 $430
Maintenance fee at 7.5 years 1.20(f) $4,040 $1,616 $808
Maintenance fee at 11.5 years 1.20(g) $8,280 $3,312 $1,656
Filing to grant $3,290 $1,246 $658

Two avoidable charges catch people out. If the specification, claims or abstract are not filed in DOCX, the USPTO adds $430 ($172 small, $86 micro) under 37 CFR 1.16(u), and filing on paper adds a further $400 ($200 small) under 1.16(t). See the USPTO DOCX page. Every other fee, including extensions, RCEs, the continuing application fee and the late maintenance fee petitions, is listed with its fee code in our USPTO patent fees guide, which also has a calculator.

Professional fees for drafting and prosecuting the application are separate and usually larger than the USPTO fees. They depend on the complexity of the technology, the number of office actions, and who does the work.

Utility patent examples

Three short illustrations of how the same idea is claimed in different categories. They are simplified examples, not real patents.

  • Machine and process for one product. A company builds a battery-swapping dock for delivery drones. It claims the dock itself (a frame, a gripper, a charging rack and a controller that aligns the drone), and separately a method of swapping the battery in under a set time. A competitor who builds a different dock but runs the same swapping sequence may still infringe the method claim.
  • Composition with a use claim. A materials startup finds that adding a small fraction of a known additive to a polymer blend doubles its fatigue life. It claims the blend with the additive in a defined range, and a method of making molded parts from it. The ranges in the claims need support in the examples in the description.
  • Software. A logistics company develops a routing method that cuts empty truck miles by reassigning loads as traffic data arrives. "A method of reducing costs by optimizing routes" invites an abstract idea rejection. A claim reciting how the system receives sensor data, recomputes assignments, and pushes updated routes to in-cab devices, with the specification explaining the technical gain, gives the applicant something to argue under MPEP 2106.

How a utility application moves through the USPTO

Many applicants start with a provisional application and file the utility application within 12 months; our provisional vs nonprovisional comparison helps decide. Once the nonprovisional is filed, it gets a filing receipt, is published about 18 months from the earliest benefit date unless a nonpublication request was made at filing, and waits for examination. The examiner may require restriction to one invention, then issues office actions until the claims are allowed or finally rejected. Claims you give up along the way can be pursued in a continuation or divisional while the parent is pending.

Draft the utility application in USPTO format

PatentAssist.ai drafts claims, the description, the abstract and drawings from your invention disclosure, in USPTO format with the 37 CFR 1.77 sections. You can check the closest art first with the free prior-art search over USPTO, EPO and Indian records. A registered practitioner should still review the draft before you file.

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Utility patents: frequently asked questions

What is a utility patent?

A US patent for a new and useful process, machine, manufacture or composition of matter, or a new and useful improvement of one (35 U.S.C. 101). It protects how something works or is made, as defined by its claims. Most US patents are utility patents; the other kinds are design patents for ornamental appearance and plant patents for asexually reproduced plants.

How long does a utility patent last?

The term starts when the patent issues and ends 20 years from the US filing date of the application, or from the earliest US application it claims the benefit of under 35 U.S.C. 120, 121, 365(c) or 386(c) (35 U.S.C. 154(a)(2)). Provisional and foreign priority dates do not count. The term can be lengthened by patent term adjustment for USPTO delays, and it ends early if a maintenance fee is not paid.

How much does a utility patent cost?

USPTO fees to file, search and examine are $2,000 for a large entity, $730 for a small entity filing in Patent Center and $400 for a micro entity, for up to 3 independent and 20 total claims. The issue fee adds $1,290, $516 or $258. Attorney or agent fees for drafting and prosecution are usually the larger part of the cost.

What is the difference between a utility patent and a design patent?

A utility patent protects the way an article works, is used or is made, through written claims, and lasts up to 20 years from filing with three maintenance fees. A design patent protects only the ornamental appearance shown in its drawings, has one claim, lasts 15 years from grant and has no maintenance fees. A product can be covered by both.

Can software be protected by a utility patent?

Yes, as a process, a machine or a manufacture (for example, a computer-readable medium), provided the claim is not directed to an abstract idea without something more. Examiners apply the Alice/Mayo framework in MPEP 2106. Claims tied to a specific technical improvement, such as how a computer or network operates, fare better than claims to a business result performed on generic computers.

Do I need a provisional application before a utility application?

No. A provisional is optional. It gives you a filing date for 12 months for a lower fee, but nothing is examined until you file the nonprovisional utility application. Many applicants file the utility application directly when the invention is settled.

Sources: 35 U.S.C. 101, 111, 154, 161 and 171; 37 CFR 1.51, 1.63, 1.76, 1.77, 1.16, 1.18 and 1.20 (eCFR, current as of October 22, 2026); MPEP 2106; USPTO fee schedule (effective January 19, 2025, last revised August 14, 2026); USPTO DOCX guidance. Checked October 26, 2026. This guide is general information, not legal advice. Have a registered patent attorney or agent review your application before you file.