US Patents are valid 17 years IIRC...
Renewal or similar fees are to be paid for the duration of the patent.
The US Patent Office has details.
The fees can be paid annually, and other options may be available.
The holder can pay fees to revive the patent to protect his invention if needed.
Renewal or similar fees are to be paid for the duration of the patent.
The US Patent Office has details.
The fees can be paid annually, and other options may be available.
The holder can pay fees to revive the patent to protect his invention if needed.