Maintenance fees coming due
3 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Feb 15, 2027. Unpaid by Aug 16, 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 11,727,988 | Ternary Memory Cell for Logic-In-Memory and Memory Device Comprising Same In force Fee due Feb 15, 2027 Lapses if unpaid Aug 16, 2027 · High confidence | Ternell Co., Ltd. | In force | Feb 15, 2027 | Aug 16, 2027 | High confidence | |
| US 11,908,863 | Transistor Element, Ternary Inverter Apparatus Comprising Same, and Method for Producing Same In force Fee due Aug 20, 2027 Lapses if unpaid Feb 22, 2028 · High confidence | Ternell Co., Ltd. | In force | Aug 20, 2027 | Feb 22, 2028 | High confidence | |
| US 11,923,846 | Ternary Logic Circuit In force Fee due Sep 5, 2027 Lapses if unpaid Mar 6, 2028 · High confidence | Ternell Co., Ltd. | In force | Sep 5, 2027 | Mar 6, 2028 | 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.