Term ended Jul 21, 2025 · High confidence
20-year base term ended Aug 4, 2024
Held by Denso Corporation and Nippon Soken, Inc.
Filed Aug 4, 2004 as application 10/910,585 · Granted Nov 11, 2008
Base term plus 351 days of patent term adjustment (USPTO delay)
Today
Term ended Jul 21, 2025
2004
2026
Clock starts
Aug 4, 2004
Aug 4, 2004
Term ended
Jul 21, 2025
Jul 21, 2025
Granted
Nov 11, 2008
Nov 11, 2008
base term
patent term adjustment
after the term ends
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
351
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.
48
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 351 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 Aug 4, 2004, when this application, 10/910,585, was filed | Aug 4, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +351 days, USPTO patent term adjustment record | Jul 21, 2025 | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | Jul 21, 2025 | High confidence |
This family
| US 7,449,822 | this patent Jul 2025 | Jul 2025 |
| US 7,535,733 | In force Oct 2027 | Oct 2027 |
| US 7,605,110 | Lapsed on the fee record Oct 2013 | Oct 2013 |
| Application 11/808,977 | Abandoned not computed | not computed |
| US 7,567,051 | Lapsed on the fee record Jul 2013 | Jul 2013 |
| US 7,783,401 | Lapsed on the fee record Aug 2022 | Aug 2022 |
| US 7,444,228 | Lapsed on the fee record Oct 2020 | Oct 2020 |
| US 7,893,604 | In force Jul 2028 | Jul 2028 |
8 of 48 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 |
|---|---|---|---|
| Aug 4, 2004 reel/frame not recorded | Hori, Tsunenobu; Morita, Hitoshi; Okabe, Shinichi; Yorita, Hiroshi | Denso Corporation | Assignment of Assignor's Interest |
| Aug 4, 2004 reel/frame not recorded | Hori, Tsunenobu; Morita, Hitoshi; Okabe, Shinichi; Yorita, Hiroshi | Nippon Soken, Inc. | Assignment of Assignor's Interest |
| Aug 4, 2004 Reel 15654, frame 404 | Yorita, Hiroshi; Okabe, Shinichi; Morita, Hitoshi; Hori, Tsunenobu | Denso Corporation; Nippon Soken, Inc. | Assignment of Assignor's Interest |
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
Note
The 351 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
2
later US patents cite this one
That is below the median of utility patents granted in 2008 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.