In the United States, the patent application must be filed within one year of the first public disclosure, public use, sale, or even offer for sale of the product, or the opportunity to obtain a patent will be lost forever.

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This is known as the "grace period" in U.S. patent law, which allows inventors a one-year window after public disclosure or offering for sale of their invention to file for a patent without losing their rights to the invention.

In the United States, the Patent Application Must Be Filed