177 patents currently held
4 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 Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
42
Ending by 2030
Nov 2026
Next term end
174
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 Nov 2028 · High confidence
Also notable
Ends Jul 2030 · High confidence
Also notable
Ends Feb 2030 · High confidence
Plug Screw Feeder for Feeding Cellulose Pulp/Chips
US 8,181,570
The largest patent family in this portfolio, 44 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Apparatus for Washing and Dewatering Pulp, a System for Controlling Such an Apparatus, and a Method for Processing Pulp in Such an Apparatus
US 8,808,499
The largest patent family in this portfolio, 33 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2030.
Arrangement for the Treatment of Cellulose Pulp in a Washing Apparatus Arranged With a Reinforcing Frame
US 8,556,087
The largest patent family in this portfolio, 42 related applications, renewed at 3 of 3 maintenance windows. Protection runs to 2030.
Formerly held, still cited
Notable
Ends Dec 2040 · High confidence
The newest of the three, granted 2022. It anchors the portfolio to 2040, later than anything else here.
now held by Wetend Technologies Oy
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 Nov 23 to 28, 2026 · next Nov 23
- 3 fees due Dec 9, 2026
- 2 fees due Jan 23 to 25, 2027 · next Jan 23
- 2 fees due Feb 15 to 22, 2027 · next Feb 15
- 3 fees due Mar 15 to 22, 2027 · next Mar 15
- 3 fees due Apr 17 to 30, 2027 · next Apr 17
- 5 fees due May 5 to 26, 2027 · next May 5
- 6 fees due Jun 1 to 30, 2027 · next Jun 1
- 4 fees due Jul 2 to 7, 2027 · next Jul 2
- 4 fees due Aug 6 to 23, 2027 · next Aug 6
- 4 fees due Sep 10 to 15, 2027 · next Sep 10
- 7 fees due Oct 9 to 30, 2027 · next Oct 9
- 1 fee due Nov 5, 2027The maintenance fee for System of Thermal Recovery Relating to the Operation of a Dissolver of a Chemical Recovery Boiler (US 10,640,924) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
- 6 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 174 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Method and System of Thermal Recovery Relating to the Operation of a Dissolver of a Chemical Recovery Boiler | 2 in force | to Feb 2038 |
| Foil Apparatus for Paper Making Machine | 2 in force | to Dec 2034 |
| Apparatus and Method for Separating Steam from Pulp Fibers | 2 in force | to Feb 2030 |
| Continuous Disc Filter Device | 1 in force | to Feb 2044 |
| Bracket for a Pivot Rod in a Doctor Arrangement and Doctor Arrangement for a Fiber Web Machine | 1 in force | to Oct 2043 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,422,132 | Vacuum Belt Conveyor with Lateral Guidance for a Web Forming Machine In force · High confidence | In force | High confidence | |
| US 7,500,553 | Belt Conveyor for Transferring a Web Threading Tail in a Web Manufacturing Machine and a Method for Changing the Belt Loop of a Belt Conveyor for a Web Threading Tail in a Web Manufacturing Machine In force · High confidence | In force | High confidence | |
| US 7,458,539 | Winder Roll Starting Apparatus for Thick Webs In force · High confidence | In force | High confidence | |
| US 7,691,235 | Apparatus and Method for Separating Steam from Pulp Fibers In force · High confidence | In force | High confidence | |
| US 7,943,012 | Protecting Device for Spraying Equipment and Method of Protecting It and Its Surroundings In force · High confidence | In force | High confidence | |
| US 7,569,265 | Seal Strip for a Suction Roll In force · High confidence | In force | High confidence | |
| US 7,491,160 | Grooved Forming Roll In force · High confidence | In force | High confidence | |
| US 7,935,179 | Method and Arrangement for Exhausting Gas from a Coating Material In force · High confidence | In force | High confidence | |
| US 7,492,271 | Method and Device for Monitoring the Condition of Shoe Roll In force · High confidence | In force | High confidence | |
| US 7,749,358 | Installation Module for a Paper or Board Machine In force · High confidence | In force | High confidence |
Also on record, not counted in the 177: 4 patents in force now held by others · 520 patents ended · 18 applications pending · 189 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.