Also listed on Minebea Co., Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Dec 27, 2028 · High confidence
20-year base term ends Jan 25, 2028
Filed Jan 25, 2008 as application 12/019,736 · Granted Nov 23, 2010
Base term plus 337 days of patent term adjustment (USPTO delay)
Today
2008
2028
Clock starts
Jan 25, 2008
Jan 25, 2008
Term ends
Dec 27, 2028
Dec 27, 2028
Granted
Nov 23, 2010
Nov 23, 2010
base term
patent term adjustment
fee events
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
337
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 337 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Jan 25, 2008, when this application, 12/019,736, was filed | Jan 25, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +337 days, USPTO patent term adjustment record | Dec 27, 2028 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 27, 2028 | High confidence |
This family
| US 7,839,113 | this patent Dec 2028 | Dec 2028 |
| US 8,035,330 | In force Jan 2028 | Jan 2028 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| May 6, 2008 Reel 20903, frame 64 | Maeda, Daisuke; Endo, Tsunehiro; Shirahama, Hidefumi; Sakurai, Kenji; Hasegawa, Hiroyuki; Mishima, Mitsuhiro | Hitachi, Ltd.; Hitachi Information & Control Solutions, Ltd. | Assignment of Assignor's Interest |
| May 6, 2008 reel/frame not recorded | Maeda, Daisuke; Sakurai, Kenji; Hasegawa, Hiroyuki; Mishima, Mitsuhiro; Shirahama, Hidefumi; Endo, Tsunehiro | Hitachi, Ltd. | Assignment of Assignor's Interest |
| May 6, 2008 reel/frame not recorded | Maeda, Daisuke; Sakurai, Kenji; Hasegawa, Hiroyuki; Mishima, Mitsuhiro; Shirahama, Hidefumi; Endo, Tsunehiro | Hitachi Information & Control Solutions, Ltd. | Assignment of Assignor's Interest |
| Nov 12, 2014 Reel 34153, frame 954 | Hitachi, Ltd. | Hitachi Power Semiconductor Device, Ltd. | Assignment of Assignor's Interest |
| Apr 30, 2025 Reel 71142, frame 232 | Hitachi Power Semiconductor Device Ltd. | Minebea Power Semiconductor Device Inc. | Change of Name |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Dec 2028
Term ends Dec 27, 2028. No further fees fall due before then
Note
The 337 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
19
later US patents cite this one
That is above the median of utility patents granted in 2010 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.