Maintenance fees coming due
2 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Jun 3, 2027. Unpaid by Dec 3, 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 10,495,944 | Nonlinear Optical System for Generating or Amplifying Light Pulses by N-Wave Mixing, Including a Fast Modulating Device In force Fee due Jun 3, 2027 Lapses if unpaid Dec 3, 2027 · High confidence | Amplitude Systemes | In force | Jun 3, 2027 | Dec 3, 2027 | High confidence | |
| US 9,240,669 | Device and Passive Method for the Coherent Combination of Two Amplified And/Or Spectrally Broadened Optical Beams In force Fee due Jul 19, 2027 Lapses if unpaid Jan 19, 2028 · High confidence | Ecole Polytechnique and Amplitude Systemes | In force | Jul 19, 2027 | Jan 19, 2028 | 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.