Maintenance fees coming due
2 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Dec 9, 2026. Unpaid by Jun 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 9,054,425 | Spherical Perturbation of an Array Antenna In force Fee due Dec 9, 2026 Lapses if unpaid Jun 9, 2027 · High confidence | Ems Technologies Canada, Ltd. | In force | Dec 9, 2026 | Jun 9, 2027 | High confidence | |
| US 9,118,118 | Increased Gain in an Array Antenna Through Optimal Suspension of Piece-Wise Linear Conductors In force Fee due Feb 25, 2027 Lapses if unpaid Aug 25, 2027 · High confidence | Ems Technologies Canada, Ltd. | In force | Feb 25, 2027 | Aug 25, 2027 | High 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.