By Gary Shuster
Provisional patent applications are one of the most valuable tools available to inventors. They let you establish a priority date, secure “patent pending” status, and buy yourself time — all at a fraction of the cost of a full utility patent application.
What Makes Provisionals So Useful
When you file a provisional patent application, you’re essentially planting a flag in the ground. You’re telling the world: “I invented this, and here’s the date to prove it.” For the next 12 months, you can develop your invention further, test the market, seek funding, or line up manufacturing — all while maintaining your priority date.
The Key Rules
- Describe everything: Your provisional must contain enough detail for someone skilled in the field to build your invention. Vague descriptions won’t support the claims you’ll later make in your utility application.
- File before disclosing: If you show your invention publicly (at a trade show, in a pitch meeting without an NDA, or in a publication), your clock starts ticking. File the provisional first.
- Stack provisionals: You can file multiple provisionals as your invention evolves, then roll them all into one utility application before the first one’s anniversary.
- Don’t forget the deadline: You must file a non-provisional (utility) application within 12 months. There is no extension or grace period.
Frequently Asked Questions
Is a provisional patent application worth the cost?
For most inventors, absolutely. The USPTO filing fee is as low as $80 for micro entities. Even with attorney fees, a provisional typically costs $1,500 to $4,000 — a fraction of a full utility application. The priority date and “patent pending” status alone can be worth far more in competitive markets.
What cannot be in a provisional patent application?
A provisional can contain anything a utility application can — descriptions, drawings, flowcharts, data. What it does NOT include are formal patent claims (those come with the utility application). But your descriptions must still be thorough enough to support whatever claims you’ll eventually make.
Ready to protect your invention with a provisional? Contact DeepLaw to get started.