Can I Tell Others About My Invention Before I File a Patent Application?

It depends on where you want patent protection — and the safest answer is always to file before you disclose.

This is one of the most common and important questions inventors ask, and the answer differs significantly between the United States and the rest of the world.

In the United States: A 1-Year Grace Period

In the United States, there is a 1-year grace period. If you publicly disclose your invention — by publishing an article, presenting at a conference, offering it for sale, or any other public disclosure — you have one year from that disclosure to file a U.S. patent application. Disclosures made within that 1-year window generally cannot be used as prior art against your own U.S. patent application.

However, this grace period comes with important caveats:

• The U.S. is a first-to-file country. Even if you publicly disclosed your invention first, if someone else independently invents the same thing and files a patent application before you do, they may be entitled to the patent. The grace period protects you from your own disclosures — it does not protect you from a competing inventor who files first.
• Third-party disclosures can still be prior art. If someone else discloses your invention — not based on information they learned from you — that disclosure can be prior art against your application even within the grace period.
• Filing early is always better. The old patent adage “file often and file early” exists for good reason. Every day you wait after a public disclosure is a day someone else could independently develop and file on the same invention.

Outside the United States: No Grace Period in Most Countries

This is where the stakes get significantly higher. Most countries outside the United States do not have a grace period. They operate under an absolute novelty standard — meaning any public disclosure of your invention before your patent application’s filing date destroys your ability to obtain a patent in those countries.

Each country has its own rules, and some countries do have limited grace periods for certain types of disclosures. But none of them have a broadly applicable 1-year grace period like the United States. If you want to preserve your foreign patent rights, you should file a patent application — or at minimum a provisional patent application to establish a priority date — before publicly disclosing your invention.

This is particularly important if you are considering filing a PCT application to pursue international patent protection. See my page on What is a PCT Application? for more detail on the international filing process.

What Counts as a Public Disclosure?

A public disclosure is broader than most inventors realize. It can include:

• Publishing an article, paper, or blog post describing the invention
• Presenting at a conference or trade show
• Offering the invention for sale — even without a completed sale
• Demonstrating the invention publicly
• Posting about it on social media
• Describing it in a crowdfunding campaign

Confidential disclosures — such as discussions under a non-disclosure agreement — generally do not constitute public disclosures and do not trigger the clock. However, it is important that the NDA is properly drafted and that the disclosure is genuinely confidential.

The Bottom Line

If you want to protect your invention both in the U.S. and internationally, file a patent application before you publicly disclose it. If you have already made a public disclosure, you may still have options in the U.S. — but you should act quickly and consult a patent attorney to understand what rights remain available to you.

Contact me to discuss your invention and your options.

Related Topics:

I Haven’t Filed a Patent Application Yet, What Deadlines Should I be Aware of?

How Do I Protect My Invention in Foreign Countries?

What Does it Mean to Be “Patent Pending”?