81 patents currently held
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 Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
10
Ending by 2030
Dec 2026
Next term end
61
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
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. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Feb 2034 · High confidence
Also notable
Ends Aug 2028 · High confidence
Also notable
Ends Sep 2027 · High confidence
Floor Drain Assembly and Method
US 9,422,708
Cited by 46 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 2034.
Closet Flange System for Existing Installation
US 8,099,801
The most cited patent in this portfolio, cited by 52 later US patents, top 25% of utility patents granted in 2012 in our data. Protection runs to 2028.
Closet Flange Spacer
US 7,805,777
Renewed at every maintenance window since the 2010 grant; no more fees are due before its term ends in 2027.
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 Nov 26, 2026The maintenance fee for Non-Return Valve Assembly of the Pivoting Flap Type, Typically for Insertion in Floor Drains (US 9,038,660) comes due Nov 26, 2026. Unpaid by May 26, 2027, it lapses early.
- 2 fees due Dec 13, 2026
- 2 fees due Mar 3 to 5, 2027 · next Mar 3
- 1 fee due May 19, 2027The maintenance fee for Floor Drain Assembly And Method (US 10,480,170) comes due May 19, 2027. Unpaid by Nov 19, 2027, it lapses early.
- 1 fee due Jul 30, 2027The maintenance fee for Product And Method For Sealing And Lubricating Sewer Manhole Assemblies (US 11,885,094) comes due Jul 30, 2027. Unpaid by Jan 31, 2028, it lapses early.
- 2 fees due Aug 6 to 20, 2027 · next Aug 6
- 2 fees due Oct 2 to 9, 2027 · next Oct 2
- 1 fee due Nov 7, 2027The maintenance fee for Solvent Cement Formulations Having Extended Shelf Life (US 11,976,222) comes due Nov 7, 2027. Unpaid by May 8, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
What they patent
The 5 largest of its 61 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Floor Drain Assembly and Method | 4 in force | to Feb 2034 |
| Primers For Use With Solvent Cements | 3 in force | to Nov 2040 |
| Modular Plumbing Box System And Methods Of Mounting The Same | 3 in force | to Mar 2038 |
| Solvent Cement Formulations | 3 in force | to Jan 2038 |
| Solvent Cement Formulations Having Extended Shelf Life | 2 in force | to Aug 2041 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,350,243 | Closet Flange with Knockout In force · High confidence | In force | High confidence | |
| US 7,805,777 | Closet Flange Spacer In force · High confidence | In force | High confidence | |
| US RE47,752 | Closet Flange System for Existing Installation In force · Low confidence | In force | Low confidence | |
| US 7,592,385 | Universal Solvent Cement In force · High confidence | In force | High confidence | |
| US 8,099,801 | Closet Flange System for Existing Installation In force · High confidence | In force | High confidence | |
| US D721,041 | Outlet Box In force · High confidence | In force | High confidence | |
| US 10,060,102 | Plumbing Supply Boxes In force · High confidence | In force | High confidence | |
| US 7,838,585 | Plastic Adhesive In force · High confidence | In force | High confidence | |
| US D749,521 | Outlet Box In force · High confidence | In force | High confidence | |
| US D759,791 | Grate In force · High confidence | In force | High confidence |
Also on record, not counted in the 81: 14 patents ended · 5 applications pending · 10 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.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.