Demos, papers, and launches: protecting patent rights before you go public
The US grace period is real, narrower than most founders assume, and missing in much of the world.
Technology companies disclose constantly. Product launches, conference talks, research papers, open source releases, demo days, investor decks, sales conversations. Each of these can affect your ability to patent what you are showing. The rules are not intuitive, and the most common mistake is not a reckless one. It is a reasonable assumption that turns out to be wrong.
The US grace period, and its limits
In the United States, an inventor generally has a one-year grace period after their own public disclosure to file a patent application. That is a real protection, and it is why a US filing is often still possible after a launch. But three limits catch companies out.
1. Much of the world has no general grace period
Many major jurisdictions, including Europe and China, require absolute novelty with only narrow exceptions. In those places, a public disclosure before your filing date can prevent a patent on what you disclosed. Some countries have their own grace periods, but they differ in length and scope. If international protection could matter to your business, the safe assumption is that you need to file before you disclose.
2. The grace period is not a priority date
Between your disclosure and your filing, someone else may file on related work or publish something similar. US law gives your own disclosure some protection against those intervening events, but that protection is narrower and less certain than many founders assume, particularly when what the other party disclosed is not identical to yours.
3. A year goes quickly
The relevant date may be earlier than the public launch, and earlier than anyone remembers: a beta, a conference poster, a blog post, a demo video, or a commercial offer or sale, even a confidential one. Companies that plan to "file within the year" often discover the year began months before they thought it did. Give counsel the full timeline, including confidential sales activity, so the dates can be assessed for the subject matter you want to claim.
What counts as a disclosure
The categories are broader than many people expect:
- Publications: papers, preprints, theses, blog posts, technical documentation, and conference slides.
- Public use and demos: showing the invention working to people not bound by confidentiality, including at trade shows and demo days.
- Product releases: a launch, a public beta, an app store release, or an open source repository.
- Sales and offers: a commercial offer for sale of an invention that is ready for patenting can start the clock even when the deal itself is confidential. The US Supreme Court confirmed in 2019 that a confidential sale can still trigger the on-sale bar. Not every sales conversation is an offer, but the analysis turns on the facts, so flag sales activity to counsel early.
Pitching investors under a nondisclosure agreement is generally not a public disclosure, and an NDA helps for partner demos too. But an NDA does not make an offer for sale safe, and a demo day audience is not under an NDA.
If something is about to become public, file first. A well-prepared provisional application filed before the disclosure can support the filing date of later claims, but only for subject matter it adequately describes and enables. Follow-on US and international filings generally must be made within twelve months to claim its benefit.
Before you go public: a short checklist
- Flag disclosures early. Put launches, papers, talks, and open source releases on counsel's calendar weeks ahead, not days.
- Decide what is worth protecting. Not every disclosed feature needs a patent. Evaluate the candidates and file on the ones that matter.
- Make the provisional match the disclosure. A provisional only supports what it adequately describes and enables; a brief mention is not enough. A thin provisional filed the night before a launch may not cover what you showed.
- Disclose deliberately. You often control how much detail goes public. A launch can show what a product does without explaining how it does it. But withholding implementation details does not necessarily prevent a public-use or on-sale bar, so have counsel assess the planned activity.
- Record what went out and when. Keep copies and dates of papers, slides, and releases. They matter later.
Where this connects
This is one of the most common reasons companies lose patent rights they would have wanted, and one of the easiest to prevent with a standing process. When counsel knows what is coming, the filing can be ready before the announcement rather than reconstructed after it.
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