7 patents currently held
20 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
5 more records may belong here and await a decision; they are not counted.
The next term ends in Mar 2029. from the record
Of the 20 now held by other companies, 14 name 2543500 Alberta Ltd. B D a Shaw Pipe Protection as their current owner, and 6 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
1
Ending by 2030
Mar 2029
Next term end
2
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
Only 2 of the currently held patents qualify as notable.
Notable
Ends May 2035 · High confidence
Also notable
Ends Oct 2041 · High confidence
Portable Pipe Lathe and Method
US 10,226,823
The most cited patent in this portfolio, cited by 29 later US patents, top 10% of utility patents granted in 2019 in our data. Protection runs to 2035.
Pressure Equalization in Composite Pipes
US 12,313,190
Granted 2025. Too new for citation comparison; protection runs to 2041.
Formerly held, still cited
Notable
Ends Apr 2037 · High confidence
Cited by 28 later US patents, top 10% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2037.
now held by 2543500 Alberta Ltd. B.D.A. Shaw Pipe Protection
Also notable
Ends May 2036 · High confidence
Cited by 28 later US patents, top 10% of utility patents granted in 2019 in our data. Protection runs to 2036.
now held by SFL Canusa Canada Ltd.
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.
- 1 fee due Jul 26, 2027The maintenance fee for High Temperature Fiber Reinforced Pipe (US 9,243,727) comes due Jul 26, 2027. Unpaid by Jan 26, 2028, it lapses early.
- 1 fee due Oct 26, 2027The maintenance fee for Connection for a Thermoplastic Pipe, Assembly and Method (US 9,322,495) comes due Oct 26, 2027. Unpaid by Apr 26, 2028, it lapses early.
Recent changes
- 2 terms have ended since Aug 16, 2026
What they patent
Grouped by real patent family, largest first, labeled by the earliest filing in each. No technology classification is inferred from titles.
| Pipe Coupling and Method for Installation | 6 in force | to May 2035 |
| Pressure Equalization in Composite Pipes | 1 in force | to Oct 2041 |
Patents held now
Soonest term end first.
Showing 1 to 7 of 7
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,946,629 | Pipe Coupling and Method for Installation In force · High confidence | In force | High confidence | |
| US 10,724,660 | Flexible Reinforced Pipe and Reinforcement Tape held by Shawcor Ltd. Shawcor Ltée In force · High confidence | In force | High confidence | |
| US 9,243,727 | High Temperature Fiber Reinforced Pipe In force · High confidence | In force | High confidence | |
| US 9,322,495 | Connection for a Thermoplastic Pipe, Assembly and Method held by Shawcor Ltd. Shawcor Ltée In force · High confidence | In force | High confidence | |
| US 9,726,306 | Flexible Reinforced Pipe and Reinforcement Tape held by Shawcor Ltd. Shawcor Ltée In force · High confidence | In force | High confidence | |
| US 10,226,823 | Portable Pipe Lathe and Method held by Shawcor Ltd. Shawcor Ltée In force · High confidence | In force | High confidence | |
| US 12,313,190 | Pressure Equalization in Composite Pipes In force · High confidence | In force | High confidence |
Also on record, not counted in the 7: 20 patents in force now held by others · 22 patents ended · 2 applications pending · 28 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.
2 terminal disclaimers are on file with no resolved reference. No cap is applied and none is guessed