Maintenance fees coming due
3 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Feb 8, 2027. Unpaid by Aug 9, 2027, that one lapses early.
A maintenance fee does not end a patent on its due date. It falls due at 3.5, 7.5
and 11.5 years from grant, and the patent lapses only if the fee is still unpaid at the end of the
six month grace period that follows.
| Patent | Title | Holder | Status | Fee due | Lapses if unpaid | Expires | Confidence |
|---|---|---|---|---|---|---|---|
| US 11,721,235 | Quadcopter Sensor Noise and Camera Noise Recording and Simulation In force Fee due Feb 8, 2027 Lapses if unpaid Aug 9, 2027 · High confidence | Performance Drone Works LLC | In force | Feb 8, 2027 | Aug 9, 2027 | High confidence | |
| US 10,467,825 | Airframe Health Monitor In force Fee due May 5, 2027 Lapses if unpaid Nov 5, 2027 · High confidence | Performance Drone Works LLC | In force | May 5, 2027 | Nov 5, 2027 | High confidence | |
| US 10,499,003 | Diversity Receiver In force Fee due Jun 3, 2027 Lapses if unpaid Dec 3, 2027 · High confidence | Performance Drone Works LLC | In force | Jun 3, 2027 | Dec 3, 2027 | High confidence |
3 of 3 patents shown. Soonest fee due date first, then patent number.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.