68 patents currently held
2 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.
66
Ending by 2030
Dec 2026
Next term end
64
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 Aug 2028 · High confidence
Also notable
Ends Sep 2029 · High confidence
Also notable
Ends Oct 2028 · High confidence
Peroxide Crosslinked Ethylene Polymer Pressure Pipe and a Method for the Preparation Thereof
US 8,968,851
The most cited patent in this portfolio, cited by 19 later US patents, top 25% of utility patents granted in 2015 in our data. Protection runs to 2028.
Polyolefin Compositions Having Improved Optical and Mechanical Properties
US 8,288,481
Renewed at every maintenance window since the 2012 grant; no more fees are due before its term ends in 2029.
Article
US 9,139,709
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2028.
Formerly held, still cited
Notable
Ends Apr 2030 · High confidence
Renewed at every maintenance window since the 2013 grant; no more fees are due before its term ends in 2030.
now held by CRTS Global, LLC
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 Mar 22, 2027The maintenance fee for Article (US 9,139,709) comes due Mar 22, 2027. Unpaid by Sep 22, 2027, it lapses early.
- 3 fees due Jun 1 to 22, 2027 · next Jun 1
Recent changes
- 3 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 64 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Equipment and Process for Producing Polymer Pellets | 3 in force | to Mar 2032 |
| Polyolefin Composition for Medium/High/Extra High Voltage Cables with Improved Electrical Breakdown Strength | 2 in force | to Nov 2029 |
| Semiconductive Polyolefin Composition | 2 in force | to Jun 2029 |
| Removing Volatile Compounds from Polymer Pellets | 1 in force | to Oct 2031 |
| Low Migration Polyolefin Composition | 1 in force | to Sep 2030 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,732,711 | Semiconductive Polymer Composition In force · High confidence | In force | High confidence | |
| US 8,124,877 | Semiconductive Polymer Composition In force · High confidence | In force | High confidence | |
| US 8,044,160 | Polyethylene Composition for Injection Molded Caps and Closure Articles In force · High confidence | In force | High confidence | |
| US 8,399,374 | Catalyst Particles In force · High confidence | In force | High confidence | |
| US 8,058,336 | Flame Retardant Polymer Composition Comprising Polyolefin with High Molecular Weight Distribution In force · High confidence | In force | High confidence | |
| US 8,153,745 | Multi-Branched Polypropylene In force · High confidence | In force | High confidence | |
| US 7,820,773 | Olefin Polymerisation Catalyst In force · High confidence | In force | High confidence | |
| US 8,278,393 | Polyethylene Blend Component and Blends Containing the Same In force · High confidence | In force | High confidence | |
| US 7,740,808 | Process and Apparatus for Producing Olefin Polymers In force · High confidence | In force | High confidence | |
| US 7,799,841 | Polypropylene Foam In force · High confidence | In force | High confidence |
Also on record, not counted in the 68: 2 patents in force now held by others · 56 patents ended · 9 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.