Also listed on JSR Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ended Oct 24, 2026 · Medium confidence
20-year base term ended Oct 27, 2025
Why Medium: A parent in the chain could not be resolved.
Held by Isc Co., Ltd.
Filed Apr 26, 2007 as application 11/718,065 · Granted Feb 2, 2010
Base term plus 362 days of patent term adjustment (USPTO delay)
Today
Term ended Oct 24, 2026
2005
2026
Clock starts
Oct 27, 2005
Oct 27, 2005
Term ended
Oct 24, 2026
Oct 24, 2026
Granted
Feb 2, 2010
Feb 2, 2010
base term
patent term adjustment
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
362
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 362 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. Confidence: Medium. 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 Oct 27, 2005, when application PCT/JP2005/019799, the earliest non-provisional in its chain, was filed (this one was filed Apr 26, 2007); a parent in its chain could not be resolved (the next row) | Oct 27, 2025 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +362 days, USPTO patent term adjustment record | Oct 24, 2026 | 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 | Oct 24, 2026 | Medium confidence |
This family
| US 7,656,176 | this patent Oct 2026 | Oct 2026 |
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 |
|---|---|---|---|
| Dec 15, 2009 Reel 23652, frame 338 | Yoshioka, Mutsuhiko; Fujiyama, Hitoshi; Igarashi, Hisao | JSR Corporation | Assignment of Assignor's Interest |
| Jul 11, 2014 Reel 33301, frame 837 | JSR Corporation | Isc Co., Ltd. | 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.
What's changing
Note
The 362 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
3
later US patents cite this one
That is below 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.