What is a USPTO patent file wrapper?
The file wrapper — formally the Image File Wrapper, or IFW — is the complete prosecution record of a US patent application: every paper the applicant filed with the USPTO, and every paper the Office sent back. It is the written record of how a patent was argued into existence, which makes it the primary source for prosecution history estoppel, claim construction, validity and freedom-to-operate analysis, and competitive intelligence on a rival's portfolio.
This tool reads that record live from the USPTO's public API and hands it back to you as PDFs. It is free, and there is no account to create.
What you get back
Enter an application number and every document on file is listed, dated, and sorted into categories so a hundred-document history stays navigable:
- Office Actions — non-final and final rejections, restriction requirements, Ex parte Quayle actions, advisory actions, examiner's answers
- Responses — amendments, applicant arguments and remarks, after-final responses, preliminary and supplemental amendments
- Prior Art — references cited (PTO-892), examiner search strategies, foreign references, non-patent literature
- IDS — information disclosure statements, PTO-1449 and SB08 forms, third-party submissions
- Appeals — notices of appeal, appeal and reply briefs, PTAB and Board decisions, requests for rehearing
- Allowance — notices of allowance, issue fee payments, issue notifications, certificates of correction
- Application papers — specification, claims, abstract, oath or declaration, application data sheet, terminal disclaimers, drawings
- Plus RCE and continuation requests, petitions, PCT and national stage papers, fees, notices, and general correspondence
Filter by category or search document titles to pull out just the office actions, just the amendments, or just the cited art.
Three ways to download
One at a time. Download any single document as a PDF, or as a Word file where the USPTO offers that format.
Download All (ZIP). Every document as its own PDF, each named with its official date and document type, bundled into a single ZIP.
Download Merged PDF. The entire file history combined into one chronological PDF with a bookmark for each document, so you can read a prosecution straight through from filing to issue and jump to any paper from the outline pane. Very large histories are split into numbered parts automatically and delivered as a ZIP.
Finding an application number
A US patent application number is eight digits: a two-digit series code followed by a six-digit serial number, conventionally written 14/472,023. Enter it however you have it — with or without the slash and comma, with a US or Ser. No. prefix, or as eight bare digits — and it will be read correctly.
If you only have a granted patent number, the application number appears on the front page of the patent under “Appl. No.”, and in the bibliographic data on Google Patents or in USPTO Patent Center.