A US utility patent lapses — also called expiring due to non-payment — when the patent holder fails to pay a required maintenance fee to the USPTO. Once lapsed, the patented technology enters the public domain: anyone can use, manufacture, or sell it without a licence or royalty payment.
The lapse process
USPTO opens a maintenance fee payment window (at 3.5, 7.5, and 11.5 years post-grant)
Patent holder has 6 months to pay without surcharge
A further 6-month grace period applies with a late surcharge
If still unpaid after 12 months from the due date, the patent lapses
USPTO publishes the lapse in the Official Gazette
The technology immediately enters the public domain
Can a lapsed patent be reinstated?
Yes — within 2 years of lapse, if the patent holder can show the delay was "unintentional", they can petition for reinstatement and pay all overdue fees plus surcharges. This creates a window of uncertainty for competitors: the patent may look lapsed but could be reinstated.
Strategic opportunity for competitors
Patent lapses create immediate commercial opportunities: freedom to operate, ability to manufacture previously blocked products, and competitive intelligence on where rivals are cutting R&D investment. PatentLapse monitors USPTO fee events in real time and alerts subscribers when watched patents enter fee windows or lapse.
Monitor any patent for maintenance fee windows and lapses — automatically
Does a lapsed patent become public domain immediately?
Yes. Once a US patent lapses due to non-payment of maintenance fees, the technology enters the public domain immediately and anyone can use it without a licence.
Can you use technology from a lapsed patent?
Yes — once lapsed and past the 2-year reinstatement window, the technology is freely usable. During the reinstatement window, there is some risk the patent could be revived.
How do you find out if a patent has lapsed?
Check the USPTO patent maintenance fee status via PatentLapse or the USPTO Patent Center. Lapses are published in the Official Gazette.
Last updated: 2026-08-30 · Data: USPTO public domain ·
Not legal advice — consult a patent attorney before acting on this information.