Is infringement possible for an expired patent?
- Boolean IP Team
- Feb 7, 2018
- 1 min read

Even if a patent is expired, the patent owner has six years from the expiration date to file a lawsuit in order to collect monetary damages for past infringement before the expiration date. Also, note that the claims of a patent can be invalidated by federal courts and/or the USPTO prior to their expiration, but not afterwards.
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