one-year rule

one-year rule
A rule that requires a patent application to be filed within one year of:
1) any public use of the invention by the inventor,
2) a sale of the invention,
3) an offer to sell the invention, or
4) any description of the invention by the inventor in a published document. Failure to file a patent application within this one-year period results in the invention's passing into the public domain, where it is no longer eligible for a patent. The application of the one-year rule to sales is sometimes referred to as the on-sale bar.
Category: Patent, Copyright & Trademark → Patent Law

Nolo’s Plain-English Law Dictionary. . 2009.

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