A fee charged by the patent office to keep the patent in force. Maintenance Fees are due at 3½, 7½, and 11½ years from the date of issue of the patent. Failure to pay the maintenance fees will result in abandonment of the patent.
A fee charged by the patent office to keep the patent in force. Maintenance Fees are due at 3½, 7½, and 11½ years from the date of issue of the patent. Failure to pay the maintenance fees will result in abandonment of the patent.
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