2,004 patents currently held
18 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.
4 more records may belong here and await a decision; they are not counted.
The next term ends in Nov 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
267
Ending by 2030
Nov 2026
Next term end
1,940
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 May 2035 · High confidence
Also notable
Ends Feb 2028 · High confidence
Also notable
Ends Aug 2038 · High confidence
Composite Substrate
US 10,211,389
Cited by 11 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 2035.
Honeycomb Segment
US 7,858,169
Cited by 58 later US patents, top 25% of utility patents granted in 2010 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Member for Semiconductor Manufacturing Apparatus, Method for Producing the Same, and Heater Including Shaft
US 10,631,370
A family of 14 related applications built on the 2020 grant. Protection runs to 2038.
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.
- 12 fees due Nov 14 to 30, 2026 · next Nov 14
- 36 fees due Dec 2 to 30, 2026 · next Dec 2
- 22 fees due Jan 2 to 30, 2027 · next Jan 2
- 29 fees due Feb 1 to 27, 2027 · next Feb 1
- 32 fees due Mar 1 to 29, 2027 · next Mar 1
- 41 fees due Apr 1 to 30, 2027 · next Apr 1
- 36 fees due May 3 to 28, 2027 · next May 3
- 38 fees due Jun 1 to 30, 2027 · next Jun 1
- 41 fees due Jul 2 to 30, 2027 · next Jul 2
- 44 fees due Aug 2 to 27, 2027 · next Aug 2
- 39 fees due Sep 1 to 30, 2027 · next Sep 1
- 34 fees due Oct 2 to 30, 2027 · next Oct 2
- 7 fees due Nov 3 to 10, 2027 · next Nov 3
Recent changes
- 68 of the patents on this record were granted since Aug 16, 2026
- 25 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 1,940 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Catalyst Carrier for Exhaust Gas Purification | 4 in force | to Nov 2035 |
| Catalyst Support and Induction Heating Catalyst System | 3 in force | to Aug 2041 |
| Composite Substrate for Electro-Optic Element and Method for Manufacturing the Same | 3 in force | to May 2038 |
| Gas Sensor | 3 in force | to Jun 2037 |
| Ceramic Formed Body Extrusion Method, Ceramic Formed Body, and Ceramic Porous Body | 3 in force | to Jun 2037 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,608,138 | Device for Measuring Filter Pressure Loss In force · High confidence | In force | High confidence | |
| US 7,687,824 | Method of Improving Surface Flatness of Group-III Nitride Crystal, Substrate for Epitaxial Growth, and Semiconductor Device In force · High confidence | In force | High confidence | |
| US 7,754,309 | Ceramic Honeycomb Structure Body and Method of Manufacturing the Same In force · High confidence | In force | High confidence | |
| US 7,575,942 | Epitaxial Substrate, Semiconductor Element, Manufacturing Method for Epitaxial Substrate and Method for Unevenly Distributing Dislocations in Group III Nitride Crystal In force · High confidence | In force | High confidence | |
| US 7,553,787 | Aluminum Nitride-Based Ceramic Sintered Body and Member for Semiconductor Manufacturing Device In force · High confidence | In force | High confidence | |
| US 7,755,750 | Method of Detecting Porous Material Defect In force · High confidence | In force | High confidence | |
| US 7,585,347 | Ceramic Filter In force · High confidence | In force | High confidence | |
| US 7,488,367 | Honeycomb Filter and Method of Manufacturing the Same In force · High confidence | In force | High confidence | |
| US 7,442,450 | Yttria Sintered Body, Electrostatic Chuck, and Manufacturing Method of Yttria Sintered Body In force · High confidence | In force | High confidence | |
| US 7,678,439 | Honeycomb Structure and Die for Forming Honeycomb Structure In force · High confidence | In force | High confidence |
Also on record, not counted in the 2,004: 18 patents in force now held by others · 1,175 patents ended · 480 applications pending · 794 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.