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 11,717,581 | Bacterial Light Source with High Quality of Light In force Fee due Feb 8, 2027 Lapses if unpaid Aug 9, 2027 · High confidence | Ecosense Lighting Inc. | In force | Feb 8, 2027 | Aug 9, 2027 | High confidence | |
| US 10,492,264 | Lighting Systems for Providing Tunable White Light With Functional Diode Emissions In force Fee due May 26, 2027 Lapses if unpaid Nov 26, 2027 · High confidence | Korrus, Inc. | In force | May 26, 2027 | Nov 26, 2027 | High confidence | |
| US 11,963,274 | Methods For Generating Tunable White Light With High Color Rendering In force Fee due Oct 16, 2027 Lapses if unpaid Apr 17, 2028 · High confidence | Korrus, Inc. | In force | Oct 16, 2027 | Apr 17, 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.