Maintenance fees coming due
2 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Feb 25, 2027. Unpaid by Aug 25, 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 9,119,327 | Thermal Management System and Method In force Fee due Feb 25, 2027 Lapses if unpaid Aug 25, 2027 · High confidence | TDK-Lambda Corporation | In force | Feb 25, 2027 | Aug 25, 2027 | High confidence | |
| US 9,143,047 | Loosely Regulated Feedback Control for High Efficiency Isolated Dc-Dc Converters In force Fee due Mar 22, 2027 Lapses if unpaid Sep 22, 2027 · Medium confidence | TDK-Lambda Corporation | In force | Mar 22, 2027 | Sep 22, 2027 | Medium confidence |
2 of 2 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.