73 patents currently held
7 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.
The next term ends in Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
8
Ending by 2030
Dec 2026
Next term end
55
Patent families
When these terms end
Held patents by the year their term ends
notable patents
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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 2035 · High confidence
Also notable
Ends Dec 2026 · High confidence
Also notable
Ends May 2037 · High confidence
Self-Locking Push-To-Connect Insert
US 9,447,906
Cited by 42 later US patents, top 10% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2035.
Boiler Loop System
US 10,458,662
Cited by 11 later US patents, top 25% of utility patents granted in 2019 in our data. Protection runs to 2026. A terminal disclaimer caps this term to an earlier patent's.
Crimp Connection with One or More Crimping Elements
US 10,240,698
Cited by 10 later US patents, top 25% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2037.
Formerly held, still cited
Notable
Ends May 2031 · High confidence
Granted 2016 and renewed at every maintenance window due so far. Protection runs to 2031.
now held by Eaton Intelligent Power Limited
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 Apr 24 to 30, 2027 · next Apr 24
- 1 fee due May 17, 2027The maintenance fee for Crimp Evident Seal (US 9,188,260) comes due May 17, 2027. Unpaid by Nov 17, 2027, it lapses early.
- 1 fee due Jun 22, 2027The maintenance fee for Lead-Free High Temperature/Pressure Piping Components and Methods of Use (US 9,217,521) comes due Jun 22, 2027. Unpaid by Dec 22, 2027, it lapses early.
- 3 fees due Jul 9 to 28, 2027 · next Jul 9
- 3 fees due Aug 13 to 27, 2027 · next Aug 13
- 1 fee due Sep 29, 2027The maintenance fee for Valve Handle Lock (US 9,297,477) comes due Sep 29, 2027. Unpaid by Mar 29, 2028, it lapses early.
Recent changes
- 2 of the patents on this record were granted since Aug 17, 2026
What they patent
The 5 largest of its 55 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Hydronic Expansion Tank Assembly | 3 in force | to Feb 2043 |
| Piping Connections and Connection Sockets | 3 in force | to Sep 2038 |
| Push-To-Connect Fitting | 3 in force | to Apr 2035 |
| Lead-Free High Temperature/Pressure Piping Components and Methods of Use | 3 in force | to Apr 2033 |
| Purge/Fill Valve with a Main Valve Portion Aligned with a Tee | 3 in force | to Jul 2027 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,316,886 | Near Boiler Piping Apparatus with Open Drain In force · High confidence | In force | High confidence | |
| US 10,458,662 | Boiler Loop System In force · High confidence | In force | High confidence | |
| US 8,770,223 | Purge/Fill Valve with a Main Valve Portion Aligned with a Tee In force · High confidence | In force | High confidence | |
| US 7,744,042 | Offset Hanger In force · High confidence | In force | High confidence | |
| US D729,354 | Flange In force · High confidence | In force | High confidence | |
| US D729,355 | Flange In force · High confidence | In force | High confidence | |
| US 8,113,550 | Connection with Tail Piece for a Press-Fitting In force · High confidence | In force | High confidence | |
| US 7,887,248 | Swivel Attachment and Branch Line Restraint In force · High confidence | In force | High confidence | |
| US 9,541,229 | Hydro-Formed T-Fitting In force · High confidence | In force | High confidence | |
| US 8,511,124 | T-Fitting Manufacturing Method and Tool In force · High confidence | In force | High confidence |
Also on record, not counted in the 73: 7 patents in force now held by others · 15 patents ended · 7 applications pending · 15 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.