Maintenance fees coming due
5 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 11, 2026. Unpaid by Jun 11, 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 10,316,797 | Highly Accurate Continuous-Flow Vaporized Fuel Supply for Large Dynamic Power Ranges In force Fee due Dec 11, 2026 Lapses if unpaid Jun 11, 2027 · High confidence | Econtrols, LLC | In force | Dec 11, 2026 | Jun 11, 2027 | High confidence | |
| US 11,781,508 | Highly Accurate Continuous-Flow Vaporized Fuel Supply for Large Dynamic Power Ranges In force Fee due Apr 10, 2027 Lapses if unpaid Oct 12, 2027 · High confidence | EControls, LLC | In force | Apr 10, 2027 | Oct 12, 2027 | High confidence | |
| US 10,619,599 | Two-Phase LPG Fuel Supply In force Fee due Oct 14, 2027 Lapses if unpaid Apr 14, 2028 · High confidence | Econtrols, LLC | In force | Oct 14, 2027 | Apr 14, 2028 | High confidence | |
| US 10,621,433 | Multiscopic Whitetail Scoring Game Camera Systems and Methods In force Fee due Oct 14, 2027 Lapses if unpaid Apr 14, 2028 · High confidence | EControls Holdings, LLC | In force | Oct 14, 2027 | Apr 14, 2028 | High confidence | |
| US 11,959,442 | Low-Pressure Egr System with Condensate Management In force Fee due Oct 16, 2027 Lapses if unpaid Apr 17, 2028 · High confidence | EControls, LLC | In force | Oct 16, 2027 | Apr 17, 2028 | High confidence |
5 of 5 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.