How to File a Provisional Patent Application Yourself

A provisional patent application establishes your priority date, gives you "patent pending" status, and buys you 12 months to prepare a full application — all for as little as $160 in government fees. This tutorial walks you through filing one at the USPTO, step by step.

This tutorial covers self-filing (pro se). For commercially significant inventions, professional drafting by a patent attorney is strongly recommended — but a well-prepared provisional filed today is better than a perfect one filed after someone else files first.

Before You Start

You will need:

• A written description of your invention (as detailed as possible — every embodiment, variation, and alternative)
• Drawings or sketches of the invention (informal is acceptable for provisionals, but labelled and clear)
• A USPTO.gov account (create one at patentcenter.uspto.gov)
• A credit card or bank account for fee payment
• Knowledge of your entity status: micro entity ($160), small entity ($320), or large entity ($640)

Micro Entity Qualification

You qualify as a micro entity if you meet all of the following: you qualify as a small entity (fewer than 500 employees), your gross income in the previous year did not exceed 3× the US median household income (approximately $225,000 in 2025), you have not been named as an inventor on more than 4 previously filed US patent applications, and you have not assigned or licensed the application to an entity that would not itself qualify as a micro entity.

If you qualify, the filing fee is $160 instead of $320 — significant savings that compound across multiple filings.

Step 1: Prepare the Specification

The specification is the written description of your invention. For a provisional, there are no formal requirements for structure — but the quality of the description determines what you can claim in the non-provisional. Write it as if you are explaining the invention to a skilled engineer who needs to build it without asking you questions.

Include: what problem the invention solves, how it solves it (the mechanism, structure, or process), every alternative embodiment and variation you can think of, the materials and dimensions (or ranges) involved, and how someone would make and use the invention.

Do not include formal patent claims — they are not required for a provisional. But if you can draft rough claims, include them — they help establish what you consider the inventive concept.

Save the specification as a PDF.

Step 2: Prepare Drawings

Provisional drawings can be informal — hand sketches, CAD screenshots, annotated photographs. The key requirements are clarity and completeness: every component should be labelled with a reference numeral, every view should show features relevant to the invention, and the drawings should correspond to the written description.

Number each figure (Fig. 1, Fig. 2, etc.) and reference these numbers in the specification. Save all drawings as a single PDF or as individual image files.

Step 3: File Through Patent Center

1. Go to patentcenter.uspto.gov and log in
2. Select "New Provisional Application" from the filing options
3. Upload your specification PDF
4. Upload your drawings
5. Complete the inventor information form (name, address, citizenship)
6. Select your entity status (micro, small, or large)
7. Complete the Application Data Sheet (ADS) — basic bibliographic information
8. If claiming micro entity status, file a Micro Entity Certification form (USPTO form SB/15A or SB/15B)
9. Pay the filing fee
10. Submit the application

Upon submission, you will receive a filing receipt with your application number and filing date. This is your priority date. Save this receipt — it is your proof of "patent pending" status.

Step 4: What Happens Next

Nothing, immediately. The provisional sits at the USPTO for 12 months. It is not examined, not published, and not reviewed. You now have:

• A US priority date as of your filing date
• The right to use "patent pending" on your product and marketing materials
• 12 months to file a non-provisional application (or PCT application) claiming priority to this provisional
• 12 months to file in other countries under the Paris Convention, claiming this priority date

The critical deadline: At month 12, the provisional expires. If you have not filed a non-provisional or PCT application claiming priority by then, the priority date is lost. Set a calendar reminder for month 10 — two months before expiry — to begin preparing the non-provisional.

Common Mistakes

Writing too little. A one-page description with a single sketch creates a weak foundation. You can only claim in the non-provisional what was adequately disclosed in the provisional. Describe every variation.

Forgetting alternative embodiments. If you describe only a steel bracket, the non-provisional claims may be limited to steel brackets. Describe aluminium, titanium, and composite alternatives — even if your prototype uses steel.

Waiting too long. The provisional exists to let you file fast. If you are spending months perfecting the provisional, you are defeating its purpose. File what you have, then improve the disclosure in the non-provisional.

Not filing drawings. Drawings are technically optional in a provisional, but a provisional without drawings is significantly weaker. Include at least basic labelled sketches.

Sources

1. USPTO — Provisional Application for Patent — Official USPTO guidance on filing a provisional patent application
2. MPEP § 601.01(b) — Provisional Applications — Manual of Patent Examining Procedure section on provisional applications
3. 35 U.S.C. § 111(b) — Statutory basis for provisional patent applications
4. USPTO Patent Center — Online filing system for provisional and nonprovisional patent applications