What is Patent Prosecution?
From drafting to allowance: the stages of US prosecution, how long each takes, what it costs, and the analytics that change how it is run.
Definition
Patent prosecution is the process of preparing, filing, and negotiating a patent application with a patent office until it is granted or abandoned. It covers drafting the specification and claims, responding to examiner rejections, amending claims, and paying the fees that carry the application to issue.
Key Facts
- Average US pendency: About 2 to 3 years from filing to final disposition, with the first office action arriving after roughly 18 to 20 months
- Accelerated options: Track One prioritized examination targets a final disposition within 12 months; the Patent Prosecution Highway uses a favorable foreign or PCT result to jump the queue
- Typical cost: Drafting and filing a US utility application commonly runs in the low five figures in attorney fees, with each office action response adding a few thousand dollars
- Rounds: Most applications see two or three office actions before allowance or abandonment
- Not litigation: Prosecution is an ex parte negotiation with the examiner; litigation is enforcement in court
The Stages
- Invention disclosure and the decision to file
- Drafting: Specification, drawings, and claims, often preceded by a prior art search
- Filing: A provisional, a non-provisional, or a PCT application, with the inventor declaration and assignment
- Publication: 18 months after the earliest priority date unless a non-publication request was filed
- Examination: The examiner searches, may issue a restriction requirement, then issues a first office action
- Response and amendment: The applicant argues, amends, interviews the examiner, or files an information disclosure statement
- Final action and after-final options: A request for continued examination, an appeal to the Patent Trial and Appeal Board, or an after-final amendment
- Notice of allowance and issue fee, with the continuation decision made before the patent issues
- Grant, after which maintenance fees keep the patent alive
The Rejections That Drive It
Most prosecution time is spent on four grounds: § 101 subject matter eligibility, § 102 anticipation, § 103 obviousness, and § 112 written description, enablement, and indefiniteness. Obviousness is by far the most common. Each response must address every ground, and every argument made becomes part of the prosecution history that a court can later use to limit the claims.
Prosecution as a Managed Process
Examiner allowance rates vary from under 30% to over 90% within the same technology center, and outside counsel differ just as widely in rounds per allowance. Examiner analytics tell an attorney whether to interview, amend, or appeal before drafting; prosecution analytics show which firms and which art units are consuming budget. ArcPrime's office action response drafting builds the first pass from the cited references so attorney time goes to the strategy those numbers point at.
Frequently Asked Questions
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How long does patent prosecution take?
At the USPTO, about two to three years on average from filing to grant, varying widely by art unit. Software and business method art units run slower; Track One prioritized examination can reach a final disposition in about a year for an additional fee.
How much does patent prosecution cost?
Drafting and filing a US utility application typically costs in the low five figures in attorney fees plus USPTO fees. Each office action response adds several thousand dollars, so total cost through grant commonly lands between the mid and high five figures for a domestic case, with foreign filings multiplying that.
What is the difference between patent prosecution and patent litigation?
Prosecution is the process of obtaining a patent from the patent office. Litigation is enforcing a granted patent, or defending against one, in court. Different lawyers usually handle each, and statements made during prosecution can be used against the patent in litigation.
What is an examiner interview?
A telephone or video conversation between the applicant's attorney and the examiner, usually held after an office action, to discuss the rejections and possible amendments. Interviews resolve many cases faster than written responses alone, and a summary is placed in the file.
Can prosecution be accelerated?
Yes. Track One prioritized examination, available for a fee, targets final disposition within 12 months. The Patent Prosecution Highway lets an applicant with allowed claims in one office request fast-track examination of corresponding claims in another. Applicants over 65 or in poor health can petition to make special at no cost.
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