What is the difference between a provisional and a non-provisional patent?
A provisional patent application and a non-provisional patent application serve different roles in the U.S. patent process. Understanding the distinction helps you plan your filing strategy and protect your priority date without overspending early in development.
What a provisional application does
A provisional application is a lower-cost placeholder. Filing one gives your invention a priority date — the date the USPTO receives your application — and lets you use the phrase "Patent Pending" for up to 12 months. It is never examined and it never issues as a patent on its own.
After you file a provisional, you have exactly 12 months to file a non-provisional application that claims priority to it. Miss that window and the provisional lapses; you lose the priority date and must start fresh.
What a non-provisional application does
A non-provisional application is the real examination track. It must include formal patent claims (the legal scope of what you are protecting), an abstract, a detailed description, and any required drawings. A USPTO examiner reviews it, issues office actions, and — if the claims are allowed — grants a patent.
When to file which
| Situation | Recommended path |
|---|---|
| Invention is still in flux; you need runway | File provisional first, refine, then non-provisional |
| Invention is complete and competition is immediate | File non-provisional directly |
| You want to test the market before spending on prosecution | File provisional, use "Patent Pending" |
Key differences at a glance
- Cost: Provisionals have lower USPTO fees and do not require formal claims.
- Examination: Only non-provisionals are examined.
- Lifespan: A provisional expires in 12 months. A granted patent from a non-provisional lasts 20 years from the non-provisional filing date.
- Claims: Provisionals have no formal claims. Non-provisionals require at least one claim.
A practical note on scope
The non-provisional can only claim priority to whatever was disclosed in the provisional. Anything you add to the non-provisional that was not in the provisional gets the non-provisional's filing date, not the earlier provisional date. Write your provisional as thoroughly as you can.