Maintenance fees coming due
3 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Feb 11, 2027. Unpaid by Aug 11, 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 9,106,105 | Regulation of Inverter DC Input Voltage in Photovoltaic Arrays In force Fee due Feb 11, 2027 Lapses if unpaid Aug 11, 2027 · High confidence | Also Energy, Inc. | In force | Feb 11, 2027 | Aug 11, 2027 | High confidence | |
| US 9,142,960 | Constraint Weighted Regulation of Dc/Dc Converters In force Fee due Mar 22, 2027 Lapses if unpaid Sep 22, 2027 · High confidence | Also Energy, Inc. | In force | Mar 22, 2027 | Sep 22, 2027 | High confidence | |
| US 10,508,987 | System and Method for Remote Calibration of Irradiance Sensors of a Solar Photovoltaic System In force Fee due Jun 17, 2027 Lapses if unpaid Dec 17, 2027 · High confidence | Also Energy, Inc. | In force | Jun 17, 2027 | Dec 17, 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.