470 patents currently held
123 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
Of the 123 now held by other companies, 75 name Mirai Casting America Inc. as their current owner, and 48 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
65
Ending by 2030
Dec 2026
Next term end
415
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 Dec 2029 · High confidence
Also notable
Ends Apr 2033 · High confidence
Also notable
Ends May 2027 · High confidence
Flow Rate Control Using Mass Flow Rate Control Device
US 8,485,219
The most cited patent in this portfolio, cited by 412 later US patents, top 1% of utility patents granted in 2013 in our data. Protection runs to 2029.
Complex Harness
US 9,000,301
Cited by 90 later US patents, top 5% of utility patents granted in 2015 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2033.
Multi-Mode Control Algorithm
US 7,640,078
Cited by 30 later US patents, top 25% of utility patents granted in 2009 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 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.
- 4 fees due Nov 30, 2026
- 9 fees due Dec 4 to 30, 2026 · next Dec 4
- 10 fees due Jan 2 to 30, 2027 · next Jan 2
- 11 fees due Feb 1 to 28, 2027 · next Feb 1
- 9 fees due Mar 5 to 29, 2027 · next Mar 5
- 18 fees due Apr 3 to 30, 2027 · next Apr 3
- 8 fees due May 5 to 21, 2027 · next May 5
- 15 fees due Jun 5 to 29, 2027 · next Jun 5
- 12 fees due Jul 9 to 30, 2027 · next Jul 9
- 8 fees due Aug 6 to 27, 2027 · next Aug 6
- 13 fees due Sep 5 to 26, 2027 · next Sep 5
- 14 fees due Oct 2 to 30, 2027 · next Oct 2
- 4 fees due Nov 5 to 7, 2027 · next Nov 5
Recent changes
- 21 of the patents on this record were granted since Aug 16, 2026
- 5 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 415 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Method for Manufacturing Magnetostrictive Torque Sensor Shaft | 18 in force | to Nov 2042 |
| Complex Harness | 9 in force | to Apr 2033 |
| On-Tool Mass Flow Controller Diagnostic Systems and Methods | 4 in force | to Mar 2035 |
| Flow Controller Delivery of a Specified-Quantity of a Fluid | 4 in force | to Nov 2028 |
| Fe-BASED AMORPHOUS ALLOY RIBBON, PRODUCTION METHOD THEREOF, IRON CORE, AND TRANSFORMER | 3 in force | to Jun 2040 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,918,238 | Flow Controller and Its Regulation Method In force · High confidence | In force | High confidence | |
| US 8,177,921 | R-Fe-B Rare Earth Sintered Magnet In force · Medium confidence | In force | Medium confidence | |
| US 8,177,922 | R-Fe-B Anisotropic Sintered Magnet In force · High confidence | In force | High confidence | |
| US 8,182,619 | R-Fe-B Rare-Earth Sintered Magnet and Process for Producing the Same In force · Medium confidence | In force | Medium confidence | |
| US 8,187,392 | R-Fe-B Type Rare Earth Sintered Magnet and Process for Production of the Same In force · High confidence | In force | High confidence | |
| US 7,687,008 | Method for Producing Ceramic Honeycomb Filter In force · High confidence | In force | High confidence | |
| US 7,823,604 | Exhaust Apparatus Pressure Control System In force · High confidence | In force | High confidence | |
| US 7,603,186 | Adaptive Response Time Closed Loop Control Algorithm In force · High confidence | In force | High confidence | |
| US 7,640,078 | Multi-Mode Control Algorithm In force · High confidence | In force | High confidence | |
| US 7,699,070 | Shutoff Valve Apparatus and Mass Flow Control Device with Built-In Valve In force · High confidence | In force | High confidence |
Also on record, not counted in the 470: 123 patents in force now held by others · 19 patents ended · 233 applications pending · 28 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.