Also listed on Toyoda Gosei Co., Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 13, 2028 · High confidence
20-year base term ends Apr 13, 2027
Held by Astemo Ueda, Ltd.
Filed Oct 10, 2008 as application 12/296,806 · Granted May 3, 2011
Base term plus 335 days of patent term adjustment (USPTO delay)
Today
2007
2028
Clock starts
Apr 13, 2007
Apr 13, 2007
Term ends
Mar 13, 2028
Mar 13, 2028
Granted
May 3, 2011
May 3, 2011
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
335
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 335 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 Apr 13, 2007, when application PCT/JP2007/058173, the earliest non-provisional in its chain, was filed (this one was filed Oct 10, 2008) | Apr 13, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +335 days, USPTO patent term adjustment record | Mar 13, 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 | Mar 13, 2028 | High confidence |
This family
| US 7,935,980 | this patent Mar 2028 | Mar 2028 |
1 of 2 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Oct 10, 2008 Reel 21667, frame 966 | Hanawa, Kenzo; Yokoyama, Yasunori | Showa Denko K.K. | Assignment of Assignor's Interest |
| Dec 18, 2012 Reel 29489, frame 249 | Showa Denko Kabushiki Kaisha | Toyoda Gosei Co., Ltd. | Assignment of Assignor's Interest |
| Mar 2, 2026 Reel 75012, frame 216 | Hitachi Astemo Ueda, Ltd. | Astemo Ueda, Ltd. | 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
Mar 2028
Term ends Mar 13, 2028. No further fees fall due before then
Note
The 335 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
11
later US patents cite this one
That is above the median of utility patents granted in 2011 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.