FAQs Patent Questions

Question:How do I search for a particular type of patent, e.g., a design patent?

Answer:
To search for a particular type of patent, go to any one of the three search pages (Quick, Advanced, Number) and, in the appropriate patent number field (Patent Number, PN/, Query), enter the patent number including the appropriate prefix: 'D' for design patents, 'PP' for plant patents, 'R' for reissue patents, 'T' for defensive publications, 'H' for SIRs, 'X' for X patents, or 'AI' for Additional Improvements

Question:A patent is considered personal property and may be sold, mortgaged and may pass on to the heirs of a deceased patentee.

Answer:
A patent is personal property and may be sold to others or mortgaged; it may be bequeathed by a will; and it may pass to the heirs of a deceased patentee. The patent law provides for the transfer or sale of a patent, or of an application for patent, by an instrument in writing.

Question:How long is a patent granted for?

Answer:
Patents expire 20 years from the date of filing. Many other factors can affect the duration of a patent.

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