19 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
3 more records may belong here and await a decision; they are not counted.
The next term ends in Aug 2029. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
2
Ending by 2030
Aug 2029
Next term end
14
Patent families
When these terms end
Held patents by the year their term ends
notable patents
all others
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Mar 2030 · High confidence
Also notable
Ends Aug 2036 · High confidence
Also notable
Ends Apr 2038 · High confidence
Device and Method for the Plugging of Services in Conduits
US 8,197,158
Renewed at every maintenance window since the 2012 grant; no more fees are due before its term ends in 2030.
Liner Removal System
US 10,012,339
Granted 2018 and renewed at every maintenance window due so far. Protection runs to 2036.
Protrusion Patch, Method of Installation and Use, and Measurement of Quality
US 10,669,453
The newest of the three, granted 2020. It anchors the portfolio to 2038, later than anything else here.
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 2 fees due Feb 8 to 20, 2027 · next Feb 8
- 1 fee due Mar 3, 2027The maintenance fee for Insertion Tool for Rehabilitation Tubular Liner in Pipes and Pipelines (US 10,400,934) comes due Mar 3, 2027. Unpaid by Sep 3, 2027, it lapses early.
- 1 fee due Aug 4, 2027The maintenance fee for Seismic Reinforced Underground Water Conduit (US 10,550,987) comes due Aug 4, 2027. Unpaid by Feb 4, 2028, it lapses early.
- 1 fee due Oct 23, 2027The maintenance fee for Method and System for Pressure Pipe Drilling Cement-Mortar Lined and Coated Steel Cylinders (US 11,965,617) comes due Oct 23, 2027. Unpaid by Apr 24, 2028, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 5 largest of its 14 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Systems and Methods for Rehabilitation of Water Conduits and Other Conduits | 2 in force | to Oct 2038 |
| Protrusion Patch, Method of Installation and Use, and Measurement of Quality | 2 in force | to Apr 2038 |
| Insertion Tool for Rehabilitation Tubular Liner in Pipes and Pipelines | 2 in force | to Aug 2037 |
| Method and Apparatus for Rehabilitating an Underground Water Conduit and Detecting and Drilling a Service Entrance in the Conduit | 2 in force | to Mar 2033 |
| Device and Method for the Plugging of Services in Conduits | 2 in force | to Mar 2030 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,272,808 | Device and Method for the Plugging of Services in Conduits In force · High confidence | In force | High confidence | |
| US 8,197,158 | Device and Method for the Plugging of Services in Conduits In force · High confidence | In force | High confidence | |
| US 8,272,406 | Methods for Rehabilitating Conduits Using Structural Liners In force · High confidence | In force | High confidence | |
| US 8,864,418 | Method and Apparatus for Rehabilitating an Underground Water Conduit and Detecting and Drilling a Service Entrance in the Conduit In force · High confidence | In force | High confidence | |
| US 9,410,654 | Apparatus for Rehabilitating an Underground Water Conduit and Detecting and Drilling a Service Entrance in the Conduit In force · High confidence | In force | High confidence | |
| US 10,550,987 | Seismic Reinforced Underground Water Conduit In force · Medium confidence | In force | Medium confidence | |
| US 9,446,455 | Drilling Apparatus In force · High confidence | In force | High confidence | |
| US 11,125,375 | Tubular Liner for Rehabilitating Underground and Surface Pipes and Pipelines In force · High confidence | In force | High confidence | |
| US 10,012,339 | Liner Removal System In force · High confidence | In force | High confidence | |
| US 10,386,006 | Method and Apparatus for Rehabilitation of Water Conduit with Lateral Openings In force · High confidence | In force | High confidence |
Also on record, not counted in the 19: 3 applications pending · 3 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.