Patent Process · USPTO Prosecution
Patent Prosecution Timeline
Filing a patent application starts a 2–4 year process of examination, office actions, and negotiation with a USPTO examiner. Here's what happens at each stage — and what you can do to accelerate the timeline.
Typical timeline
18–30 mo
Filing to first action
Varies by art unit
24–36 mo
Total to grant
Average across all units
12 mo
Track One (expedited)
Final disposition guaranteed
14–18 mo
Design patent
Faster than utility
Stage-by-stage
What happens after you file
Filing
Day 0–30
PendingApplication filed and acknowledged
The USPTO receives your application and issues a filing receipt with an application number. For non-provisional applications, a filing date is assigned. A filing receipt arrives within 1–3 weeks. The application is then docketed to a Technology Center and an art unit based on the technology classification.
What to do
Review your filing receipt for errors — the filing date, inventor names, and priority claim are all on this document. Correct errors promptly via petition or supplemental application data sheet.
Pre-examination
Months 1–6
Pending — Awaiting examinationPre-examination processing and publication
The application is assigned to an examiner. For most applications, the USPTO publishes the application 18 months after the earliest effective filing date (not the non-provisional filing date — the provisional's date, if claimed). This publication is not the patent — it is a public disclosure of the pending application.
What to do
This is a good time to refine your commercial strategy. The published application gives you provisional rights (patent-pending notice) against infringers who knew of the publication — though you cannot sue until the patent issues.
Examination
Months 6–30 (varies by art unit)
First Action Pending (FAP)First Office Action on the Merits (FOAM)
The examiner conducts a prior art search and issues the First Office Action on the Merits. This is the examiner's first substantive evaluation of your claims — almost all applications receive at least one rejection. Common rejections: § 102 anticipation, § 103 obviousness, § 101 patent eligibility, § 112 enablement or indefiniteness. Wait time for first action varies enormously by art unit: software/business methods: 24–36 months; mechanical/electrical: 18–24 months; biotech/pharma: 18–30 months. Track One prioritized examination can get a first action in 2–4 months.
What to do
Do not panic at a first rejection — it is expected. You have 3 months to respond without an extension fee (up to 6 months with extension fees). Review the rejection carefully with your attorney. Claim amendments and arguments are your tools.
Response
3–6 months after office action
Response FiledApplicant response to first office action
You have 3 months from the office action date to respond without extension fees. Responses can include: claim amendments (narrowing claims to distinguish prior art); arguments (without amendments, explaining why the examiner's rejection is wrong); or a combination. After-final responses, RCEs, and appeal briefs have different timing rules. Failing to respond within 6 months (with maximum extension fees) results in abandonment.
What to do
A well-crafted response distinguishes the claimed invention from the cited prior art based on specific technical differences — not just legal arguments. The response becomes part of the prosecution history and affects claim scope interpretation (prosecution history estoppel).
Second examination
Months 3–12 after response
Final Rejection or AllowanceSecond office action (often 'final')
The examiner reviews the response and issues a second office action. This is often designated 'Final' — though in practice, the examiner may still allow after a proper after-final amendment. A final rejection means the examiner considers the prosecution record complete and is not obligated to further consider amendments. Options after final: After-Final Consideration Program (AFCP 2.0), Request for Continued Examination (RCE), Pre-Appeal Brief Conference, or Appeal to PTAB.
What to do
Consider a pre-appeal conference if the rejection appears unsupported by the prior art. RCE is the most common path — it costs $880–$1,760 (small entity) but reopens prosecution for another round of examination. Appeal is more expensive but creates a stronger record and higher chance of reversal for certain rejection types.
Allowance
Whenever examiner is satisfied
Allowed — Issue Fee DueNotice of Allowance
The examiner issues a Notice of Allowance when the claims are in allowable condition. The applicant must pay the issue fee (approximately $1,200 small entity, $600 micro entity) within 3 months. If you want to add new claims or file a continuation, file it before the patent issues — the parent application closes upon issue. After the issue fee is paid, the patent typically grants within 2–4 months.
What to do
Before paying the issue fee, confirm the claims as allowed reflect your commercial needs. If the allowed claims are too narrow, consider a continuation to pursue broader coverage while the parent issues. A continuation can be filed at any time before issue.
Grant
2–4 months after issue fee
IssuedPatent issues
The patent issues and appears in the USPTO Patent Full-Text Database (patents.google.com or USPTO Public PAIR). The patent number is printed on the document. You can now mark products with the patent number and have full enforcement rights. Track maintenance fee deadlines (3.5, 7.5, and 11.5 years from grant) to keep the patent in force.
What to do
Update product marking immediately. Consider whether continuations, divisionals, or continuation-in-parts should be filed to capture improvements or different claim scopes. Notify the market of your patent coverage through press release, website, and partnership communications.
Acceleration options
How to get a patent faster
Track One Prioritized Examination
USPTO guarantee: final disposition within 12 months. Limited to 10,000 petitions per fiscal year. Best for: fast-moving markets, investor milestones, licensing conversations where 'allowed' status helps.
Patent Prosecution Highway (PPH)
Requires prior allowance in a PPH-partner country. US has agreements with JPO, EPO, KIPO, CNIPA, and ~20 others. Claims must correspond to allowed foreign claims. Best for: applicants who already have an international prosecution strategy.
Accelerated Examination (AE)
Requires applicant to submit a pre-examination search statement identifying the closest prior art. Seldom used due to complexity and risk of prosecution history from the pre-exam search. Track One is usually preferred.
After Final Consideration (AFCP 2.0)
Submit an after-final amendment that doesn't require substantial new search. Examiner has 3 hours to consider. If the amendment places the application in allowable condition without extensive search, examiner can allow. No guarantee.
FAQ
Patent prosecution timeline questions
How long does it take to get a patent in the US?
The average time from non-provisional patent application filing to grant is 24–30 months for US utility patents, based on recent USPTO data. However, timing varies significantly by technology area: Computer Science and Business Methods (Technology Center 2100/3600): 30–48 months average; Electrical/Electronic (TC 2800): 22–30 months; Mechanical/Automotive (TC 3700): 20–28 months; Chemical (TC 1700): 24–32 months; Biotechnology and Pharmaceutical (TC 1600): 24–36 months; Design patents: 14–18 months average. The two main options for faster examination: (1) Track One Prioritized Examination ($4,000/$2,000 large/small entity) — USPTO guarantees final disposition within 12 months; most first actions arrive within 2–4 months; limited to 10,000 petitions per fiscal year. (2) Patent Prosecution Highway (PPH) — if a corresponding application in Japan, Europe, or another PPH partner has been allowed, you can request accelerated examination based on the foreign allowance at no cost; typically produces faster first action and improved allowance rates.
What is a patent office action?
A patent office action is a written communication from the USPTO examiner to the applicant explaining why the pending claims are not allowable. Office actions can include: rejections (the claims are rejected on specific statutory grounds — § 101, § 102, § 103, or § 112) and objections (the claims or other parts of the application have formal deficiencies that must be corrected). Most applications receive at least one substantive office action. The first office action on the merits (FOAM) is typically a non-final rejection, giving the applicant 3 months (extendable to 6 months with fees) to respond. A second office action is often designated 'Final Rejection,' which limits the options available for response. Responding to office actions is where prosecution strategy matters most — the response becomes permanent prosecution history that affects claim scope interpretation for the life of the patent.
What happens if my patent application is finally rejected?
A Final Rejection does not mean the application is dead — it means the examiner considers prosecution sufficiently developed to send the case to closure. Options after a Final Rejection: (1) After-Final Amendment with AFCP 2.0 — submit an amendment that doesn't require substantial new search; the examiner may allow with no additional fee; (2) Request for Continued Examination (RCE, $880–$1,760 small entity) — reopens prosecution and gives the applicant another complete round of examination with the same examiner; (3) Appeal to the Patent Trial and Appeal Board (PTAB) — file a notice of appeal and then an appeal brief (typically $5,000–$15,000 in attorney fees); PTAB reverses examiners about 50% of the time on appealed claims; (4) Pre-Appeal Brief Conference — a 3-examiner panel review before formally appealing; quick and inexpensive, can sometimes result in allowance or examiner reconsidering; (5) Abandon and continue — if the application has continuation or continuation-in-part applications pending, abandon the parent and continue prosecution in the child applications. Continuation applications can be filed before the parent abandons or issues.
What is Patent Prosecution Highway (PPH) and how does it work?
Patent Prosecution Highway (PPH) is a bilateral agreement between patent offices that allows an applicant who has received an allowance or positive search report in one country to request accelerated examination in another PPH-partner country. The US (USPTO) has PPH agreements with Japan (JPO), Europe (EPO), Korea (KIPO), China (CNIPA), and approximately 20 other offices. How it works: (1) Get a positive result in the first office — an allowance, a positive written opinion from the ISA, or an international preliminary examination report indicating claims are allowable; (2) File a PPH request in the second office, attaching the first office's work product; (3) The second examiner starts from the first office's analysis rather than from scratch, significantly reducing redundant search time. Benefits: faster first office actions (often 2–6 months instead of 18–36); higher allowance rates (examiners give weight to foreign allowances); no additional government fee at many offices. Limitation: the claims in the second-country application must correspond to the claims allowed in the first country — if you want a broader claim scope in the US than was allowed in Japan, PPH may not apply to those broader claims.
When does 'patent pending' protection start?
'Patent pending' status begins the moment a patent application is filed — either when a provisional application is filed (establishing a priority date and allowing 'patent pending' marking) or when the non-provisional application is filed. Patent pending status gives you the right to mark products and warn infringers. However, you cannot sue for infringement during the patent-pending period. Provisional rights (the right to collect damages for pre-issuance infringement) begin when the application publishes (18 months after the priority date) — but only against infringers who had actual knowledge of the published application and copied what was described. These provisional rights are retroactively available when the patent issues, but only for infringement that began after the publication date and only if the claims in the issued patent are substantially identical to the published claims. Most patent owners do not rely on provisional rights and simply wait for the patent to issue before asserting rights.