Q: When does a plant patent date expire? Twenty years after filling date or patent date?
A: A plant patent grants the holder the exclusive right to make, use, and sell an invention related to a new variety of plant for a period of 20 years from the filing date of the patent application. Therefore, the expiration date of a plant patent is calculated from the filing date, not the date on which the patent was granted. After the expiration date, the plant variety falls into the public domain and can be used by anyone without permission from the patent holder.
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