Can You Sell a Provisional Patent? What the Buyer Gets

Can you sell a provisional patent? Yes. A provisional is a patent application, and applications for patent, patents, or any interest therein are assignable in law by an instrument in writing. You can sign it over to a buyer this afternoon.

The more useful question is what the buyer walks away with. Every page on the first screen of results stops at "yes, but it rarely happens". None of them says what is in the box. So here is the short version: a buyer of a provisional is not buying a patent, and is not even buying a claim. They are buying a filing date, with a hard expiry, that is only worth something if somebody does the next piece of work in time.

That reframing changes how you sell it, who you sell it to, and what you can realistically ask for.

What is actually changing hands

Start with what a provisional is in the eyes of the patent office. A provisional application does not need a formal patent claim or an oath or declaration, and it is not examined. It exists to establish an early effective filing date for a later nonprovisional application, and it lets you use the term "Patent Pending". Its pendency lasts 12 months from filing and cannot be extended.

Read those properties as a buyer would:

• No examination. Nobody at the patent office has looked at whether the invention is new. There is no office action to read, no allowed claim to price.
• No claims required. The document may not even say what the eventual monopoly would cover. The buyer is inferring scope from a description.
• Twelve months, no extension. The asset starts decaying on the day it is filed.
• It never grants by itself. A provisional only becomes a patent through a later application that claims its benefit, or through conversion.

So the honest description of the asset is: a priority date, attached to a written disclosure, with whatever time remains on the clock. Everything else a buyer pays for is the buyer's own bet on what the follow-on application will be.

If you are deciding between a provisional and a full filing, our piece on how pending and issued patents differ walks through the value steps further along the curve.

The legal mechanics of the sale

A written assignment, signed by every owner

The statute requires writing, and nothing less works. An assignment must be in writing and signed by the owner; oral agreements and handshake deals have no legal effect on title. It should identify the application by number and title and name the assignor and assignee. That source is explicit that a provisional and a PCT application can be assigned before grant, tied to the application number and filing date.

Co-inventors are where provisional sales most often break. The same guide notes that every co-owner must sign, and that one co-owner can only assign their own undivided interest. On a provisional drafted in a hurry, inventorship is frequently loose. If your former co-founder is on the filing and never signed anything, you cannot deliver full title, and a buyer's counsel will find that in the first hour of diligence.

Check your employment and university agreements too. Many inventors discover at sale time that a contract they signed years ago already assigned their rights to someone else.

Record it within three months

Recording is not what makes the assignment valid between you and the buyer. It is what protects the buyer against you. The assignment should be recorded with the USPTO to reflect the transfer, and recording online is free. Under section 261, an unrecorded assignment is void against a later purchaser who buys without notice, unless it is recorded within three months of its date or before that later purchase. A serious buyer will insist on recording. If one does not, that tells you something about the buyer.

The buyer is buying a priority date on a 12-month clock

This is the section the ranking pages skip, and it is where the value of a provisional actually lives.

In the US: the benefit claim

The buyer only captures your filing date if a nonprovisional is filed in time and points back to it. Per the USPTO, the nonprovisional must be filed within the 12-month pendency. A nonprovisional filed after 12 months but within 14 can still get the benefit restored, but only with a grantable petition stating the delay was unintentional and paying a petition fee. The nonprovisional must also include a specific reference to the provisional in its application data sheet, within four months of its own filing or sixteen months of the provisional's, whichever is later.

Translate that into deal terms. If you sell in month nine, the buyer has three months to do diligence, decide what to claim, and get a full application drafted and filed. A provisional sold in month eleven is worth noticeably less than the same document sold in month two, because the buyer's ability to use it is shrinking by the week. Time is the one variable in this negotiation you control, so start early.

In Europe: the successor in title

Most buyers who care about the asset will want protection beyond the US. The European rule is written around exactly this situation. Under Article 87 EPC, any person who has duly filed an application in a Paris Convention or WTO state, "or his successor in title", enjoys a right of priority for twelve months when filing a European application for the same invention.

"Successor in title" is the buyer. The question that used to make European counsel nervous was whether the EPO would second-guess that succession. In 2023 the Enlarged Board settled it in G 1/22: there is a rebuttable presumption that the applicant claiming priority is entitled to it, and that presumption applies even where the priority applicant and the later applicant are not the same.

Rebuttable is the important word. The presumption helps the buyer, but it can be attacked. The practical lesson for both sides is the same: the assignment should state in plain words that it transfers the right to claim priority from the provisional in every jurisdiction, not only the US application, and it should be signed before the buyer files anything that relies on it. A clean document now is cheaper than an argument at the EPO later.

Why a provisional on its own rarely finds a buyer

Every attorney writing on this agrees on the direction. One puts it bluntly: selling a provisional application is possible but rarely happens, because buyers see it as an idea without proven market demand, and it would take an extremely innovative idea to convince them to take that chance before it is patented.

That is true, and it is incomplete. Practitioners also note that it is not unusual for companies to buy rights in inventions that appear in provisionals, or for investors to appraise a portfolio of provisionals, and a buyer may reference the provisional for priority in a new application.

Put the two together and the pattern is clear. Nobody buys a provisional for the document. They buy it because they already wanted the invention and the provisional gives them an earlier date than they could get by filing themselves. That means your buyer list is not "companies in my industry". It is the short list of companies for whom your filing date blocks or beats something they are already doing.

The same logic applies one step later, and we have covered it in detail for selling a pending application. Pending assets sell best attached to something stronger. A provisional is the earliest and least examined form of pending, so the discount is steepest. For what the label does and does not protect while you search for that buyer, see what patent pending status really protects. And if your real question is about selling goods while the application is open, that is a different topic: selling a product marked patent pending.

Ways to get paid without an outright sale

An assignment is the cleanest exit, and it is not the only one.

License instead of assign. The same practitioner guide on recording notes that an applicant can license the rights under a provisional to another party rather than giving them all up. Section 261 also lets an applicant grant an exclusive right under an application for the whole or a specified part of the United States. A field-limited or territory-limited licence lets a buyer move without paying for rights it does not need, and you keep the rest.

File the nonprovisional first. If the clock allows, converting the asset into something with real claims changes the conversation. It costs money and it does not guarantee grant, but it gives a buyer something to read other than a description. When we draft, the novelty search runs through Patsnap and filing goes through an independent licensed patent attorney of record; EX-IX is not a firm of patent attorneys, and a novelty search does not guarantee grant.

Treat it as a trade secret deal. If you have not filed yet, the attorney quoted above suggests licensing the idea as a trade secret under a nondisclosure agreement. Once a provisional is on file, that route narrows, but the NDA discipline still matters for anything you add after filing.

Run it as a process, not a listing. Posting a provisional on a marketplace and waiting is the weakest version of every option above. The buyer pool is small and specific, so the work is finding it. That is what a patent broker does when the job is done properly. Our own brokerage is success based: the seller pays a commission on completion, with a minimum of EUR 5,000 per completed transaction, and no sale means no fee. With that minimum, a broker only makes sense where a buyer's willingness to pay comfortably clears it, which is itself a useful test for a provisional.

We hold ourselves to the same honesty about timing that we ask of sellers. Our first listed family, Edge Assist (EXIX001), is described on IX Markets as application P00202606645, filed and pending examination, with grant uncertain. Filed in June 2026, its priority year is the planning horizon for every foreign filing decision on that family. Pending is pending, and we say so on every page.

A seller's checklist before the first call

Before you talk to a single buyer, have these answers on one page:

1. The filing date and the exact day the 12 months end. Every conversation is priced against it.
2. Every named inventor, and a signed assignment from each into whoever is selling. Fix gaps now, not in diligence.
3. Every employment, university or consulting agreement that might already cover the invention.
4. What the description actually discloses. A buyer can only claim what you wrote down. If the commercially valuable embodiment is not in there, the date does not protect it.
5. Who files the follow-on, where, and by when. Decide whether you sell before or after filing a nonprovisional or PCT.
6. The priority language in the assignment, covering every jurisdiction the buyer might want, signed before any filing that relies on it.
7. An attorney of record. This article explains how the market works. It is not legal advice on your filing.

FAQ

Is a provisional patent actually a patent?

No. It is an application that is never examined and expires 12 months after filing. It only leads to a patent if a nonprovisional application claims its benefit in time, or if it is converted by petition within those 12 months.

What happens if the buyer misses the 12-month deadline?

The benefit of the earlier date is lost. The USPTO allows restoration only if the nonprovisional is filed within 14 months of the provisional, with a grantable petition stating the delay was unintentional and the petition fee paid. Build the deadline into the contract.

Can the buyer file in Europe using my US provisional as priority?

Yes. Article 87 EPC gives the priority right to the original applicant or a successor in title, and G 1/22 presumes the later applicant is entitled unless that is rebutted. An assignment that expressly transfers the right to claim priority makes the presumption much harder to attack.

Can I license a provisional instead of selling it?

Yes. You can license rights under the application, exclusively or not, and limit the licence by field or territory. You keep ownership, and with it the obligation to file the follow-on application before the 12 months run out.