Maintenance fees coming due
5 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 11,719,374 | Systems and Methods for Rehabilitation of Water Conduits and Other Conduits In force Fee due Feb 8, 2027 Lapses if unpaid Aug 9, 2027 · High confidence | Fer-Pal Construction Ltd. | In force | Feb 8, 2027 | Aug 9, 2027 | High confidence | |
| US 10,386,006 | Method and Apparatus for Rehabilitation of Water Conduit with Lateral Openings In force Fee due Feb 20, 2027 Lapses if unpaid Aug 20, 2027 · High confidence | Fer-Pal Construction Ltd. | In force | Feb 20, 2027 | Aug 20, 2027 | High confidence | |
| US 10,400,934 | Insertion Tool for Rehabilitation Tubular Liner in Pipes and Pipelines In force Fee due Mar 3, 2027 Lapses if unpaid Sep 3, 2027 · High confidence | Fer-Pal Construction Ltd. | In force | Mar 3, 2027 | Sep 3, 2027 | High confidence | |
| US 10,550,987 | Seismic Reinforced Underground Water Conduit In force Fee due Aug 4, 2027 Lapses if unpaid Feb 4, 2028 · Medium confidence | Fer-Pal Construction Ltd. | In force | Aug 4, 2027 | Feb 4, 2028 | Medium confidence | |
| US 11,965,617 | Method and System for Pressure Pipe Drilling Cement-Mortar Lined and Coated Steel Cylinders In force Fee due Oct 23, 2027 Lapses if unpaid Apr 24, 2028 · High confidence | Fer-Pal Construction Ltd. | In force | Oct 23, 2027 | Apr 24, 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.