"Sell my idea" is the most common phrase inventors use, and the hardest thing to actually do.
The problem is not that ideas lack value. It is that an idea is not property. There is nothing to hand over, nothing to record, and — once you have described it — nothing stopping the listener from using it.
Companies buy assets, not information. A patent application has a number, an owner and a chain of title. It can be assigned in a one-page document. An idea cannot.
Which makes the answer a sequence rather than a refusal. Create the asset, then sell it.
The gap between an idea and an asset
Six stages, and the sellable line sits in the middle.
| Stage | What exists | Sellable? |
|---|---|---|
| Concept in your head | Nothing | No |
| Written description | Information | No |
| Prior art searched, claim reframed | A better idea | No |
| Provisional filed | A 12-month priority date | Weakly |
| Non-provisional filed | An assignable asset with a number | Yes |
| Granted patent | An enforceable right | Yes |
Everything above the line is information. Sharing it transfers knowledge and retains nothing. Everything below it is property that can be described in an assignment document and recorded.
The searching stage does more than protect you. Reading the close prior art usually reveals what has already been tried and where the unsolved problem actually sits — which is where a sellable claim comes from.
Most ideas stop at stage three, and that is the system working. Discovering cheaply that something already exists is a better outcome than discovering it after spending five figures.
Why a bare idea is hard to sell
| Problem | Consequence |
|---|---|
| Nothing to transfer | No assignment document is possible |
| Disclosure is irreversible | Once told, the company knows |
| No exclusivity | Nothing stops them or anyone else using it |
| Independent development | They may already be doing it |
| No verification | The buyer cannot confirm you are the source |
| No priority | Someone else may file first |
Independent development is more common than inventors expect. Large companies have engineering teams working on obvious problems. A submission that arrives describing something already on their roadmap creates a legal headache for them and no payment for you.
That risk is exactly why submission programmes are structured the way they are — with waivers rather than NDAs.
What a buyer is actually pricing
Buyers do not pay for novelty. They pay for the position an asset gives them.
| What the buyer assesses | Effect on price |
|---|---|
| Does anyone practise the claims? | The single largest driver |
| Remaining term | Multiplier on everything else |
| Claim scope and design-around cost | Sets the ceiling |
| Chain of title | A defect stops the deal entirely |
| Prosecution history | Limits how broadly claims can be read |
| Existing licences | Reduce value substantially |
| Foreign family members | Often the difference between small and large |
"Does anyone practise the claims" outranks how clever the invention is. A modest improvement covering something a competitor ships is worth more than an elegant invention nobody makes.
Design-around cost sets the ceiling. A buyer will pay up to roughly what avoiding the patent would cost them, so narrow claims describing one specific implementation support very little.
Chain of title is binary. Every named inventor must have assigned. A single unassigned inventor can stop a transaction outright, whatever the technology is worth.
What companies will actually buy
| What you have | Sellable? | Why |
|---|---|---|
| An idea, undocumented | No | Nothing to transfer |
| A detailed written description | Barely | Still just information |
| A filed provisional | Weakly | A priority date, expiring in 12 months |
| A filed non-provisional | Yes | An assignable asset with a filing date |
| A granted patent | Yes | An enforceable right |
| A patent plus evidence of use | Strongly | A priced asset with an identified buyer |
| A product with demonstrated sales | Yes | You are selling a business |
The step change is the non-provisional filing. Below that line you are asking someone to pay for information. Above it you are offering property.
Evidence of use is what turns an asset into a priced one. A patent with a claim chart mapping its elements to a specific shipping product is a different proposition from a patent with no identified practitioner.
The realistic routes
Route 1 — File, then sell
The default, and the one that works.
| Step | Cost | Time |
|---|---|---|
| Prior art search | Free | Hours |
| Provisional application | ~$60–$300 in fees plus preparation | Weeks |
| Non-provisional | $8,000–$20,000 all in | Within 12 months |
| Approach buyers | Your time, or broker commission | Months |
Search before spending anything. Most ideas are already described somewhere, and finding that out costs nothing. See invention ideas for how to run the search and what to do when it comes back occupied.
A thin provisional is worse than none. Priority extends only to what the provisional actually enabled, so a two-page sketch filed to feel safe supports claims it cannot carry. See provisional patent application.
Route 2 — Company submission programmes
Many large companies accept unsolicited submissions, on their terms.
| Typical term | What it means |
|---|---|
| No confidentiality | They owe you no secrecy |
| No obligation to pay | Even if they use it |
| Acknowledgement of parallel work | They may already have it |
| Consideration only for patented ideas, sometimes | Your filing status matters |
| Their forum and law | Disputes on their terms |
Read the waiver before submitting. These terms are not negotiable and are not hidden — they are the price of being considered at all.
Submitting with a filed application changes the position materially. Some programmes explicitly consider only submissions with patent protection, because a patent gives them something to buy rather than information to receive.
Route 3 — Build it
Selling a product with customers is a different transaction. You are no longer selling an idea; you are selling a business with revenue, and the idea is one of its assets.
Hardest route, highest return, and outside most inventors' resources. But it is the only route where the idea itself never needs to be the thing sold.
Invention promotion companies
The industry that monetises people trying to sell ideas, rather than monetising the ideas.
Federal law requires disclosure. Under 35 U.S.C. §297, before you contract, an invention promoter must tell you in writing:
- How many customers they have had in the past five years
- How many received a net financial profit from their services
- How many received licence agreements
- Any other names they have traded under
Ask in writing and read the second number. Thousands of customers and a single-digit profit count is the success rate, stated plainly. Failure to give the disclosure gives you a civil action for damages.
| Red flag | What it usually means |
|---|---|
| Unsolicited approach, then enthusiasm | The enthusiasm preceded any evaluation |
| Paid "market evaluation" returning positive | Positive evaluations are the product |
| Large upfront fee for submissions | Submission is cheap; the fee is the business |
| Reluctance to give the §297 disclosure | The numbers are bad |
| Pressure to decide quickly | Filing deadlines are real; sales deadlines are not |
| No registered patent attorney named | Nobody accountable is drafting |
Legitimate help exists. Registered patent attorneys and agents are searchable on the USPTO roster, many bar associations run reduced-fee inventor clinics, the USPTO operates a Pro Se Assistance Program, and law school IP clinics take inventors at no charge.
Worked example: two approaches, same idea
A packaging closure that reduces spillage. The inventor approaches a manufacturer.
Approach A — describe it
| Step | Outcome |
|---|---|
| Emails a description, asks for an NDA | NDA declined; submission policy sent |
| Submits under the waiver | Acknowledged |
| Response after 10 weeks | "Not pursuing at this time" |
| 18 months later | A similar closure appears in their product line |
| Recourse | None realistically — no patent, no NDA, independent development plausible |
Approach B — file first
| Step | Outcome | Cost |
|---|---|---|
| Prior art search | Two close references; claim reframed around the sealing geometry | $0 |
| Provisional filed | Priority secured | $130 fees + $2,200 drafting |
| Non-provisional filed at month 11 | Assignable asset exists | $800 fees + $9,000 |
| Approaches four manufacturers | Two request the application | — |
| One negotiates | Purchase of the pending application | — |
| Outcome | Assignment at $145,000 | Net ~$133,000 |
The difference is not effort or luck. In Approach A there was nothing to buy. In Approach B there was.
The search did real work too. It found the close references that would have sunk the original framing, and the reframing around sealing geometry came out of reading them.
Timeline for Approach B: about two years. Anyone expecting to sell an idea in a month is expecting something that does not happen.
Before you disclose anything
| What you do | US position | Rest of world |
|---|---|---|
| Nothing public | Clear | Clear |
| Told a friend, no obligation | Arguably a disclosure | Risk |
| Under a signed NDA | Not public | Not public |
| Crowdfunding page, trade show, conference | 12-month grace period running | Rights likely lost |
| Offered for sale | 12-month grace period running | Rights likely lost |
The US grace period is twelve months from your own disclosure. Most other countries give nothing, so a public disclosure usually destroys foreign rights immediately and permanently.
File before disclosing. It is the only sequence that keeps every option open, and it costs nothing extra to get the order right.
Sell my idea: the checklist
- Search the prior art first. Free, and it eliminates most ideas before any money is spent.
- Reframe the idea as a mechanism, not a result. "A better closure" is not sellable; a specified sealing geometry might be.
- Check what you have already disclosed. If anything is public, the US twelve-month clock is running and foreign rights are probably gone.
- File before approaching anyone. A provisional is modest; a non-provisional is what actually creates a sellable asset.
- Do not expect an NDA from a large company. Read their submission waiver instead, and decide with your eyes open.
- Get the §297 disclosure from anyone offering to commercialise for you, and read the net-profit figure rather than the customer count.
- Identify who already makes similar products. They are the likely buyer and the likely independent developer, which is why filing first matters.
- Build evidence of use if you can. A claim chart against a shipping product turns an asset into a priced one.
- Budget two years, not two months, from idea to payment.
- Compare selling against licensing once you have an asset — a sale ends the maintenance fees and the enforcement burden; a licence does not.