Term ended Jan 25, 2026 · High confidence
20-year base term ended Jul 10, 2022
Held by Arkray, Inc.
Filed Jan 7, 2004 as application 10/483,206 · Granted Sep 13, 2011
Base term plus 1295 days of patent term adjustment (USPTO delay)
Today
Term ended Jan 25, 2026
2002
2026
Clock starts
Jul 10, 2002
Jul 10, 2002
Term ended
Jan 25, 2026
Jan 25, 2026
Granted
Sep 13, 2011
Sep 13, 2011
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
1,295
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.
52
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 1295 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 Jul 10, 2002, when application PCT/JP2002/007030, the earliest non-provisional in its chain, was filed (this one was filed Jan 7, 2004) | Jul 10, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1295 days, USPTO patent term adjustment record | Jan 25, 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 | Jan 25, 2026 | High confidence |
This family
| Application 10/481,397 | Abandoned not computed | not computed |
| US 8,016,847 | this patent Jan 2026 | Jan 2026 |
| US 8,801,740 | Term ended Dec 2025 | Dec 2025 |
| US 8,016,773 | Term ended Dec 2022 | Dec 2022 |
| Application 10/503,290 | Abandoned not computed | not computed |
| US 8,052,942 | In force Jan 2029 | Jan 2029 |
| US 7,879,057 | Lapsed on the fee record Feb 2015 | Feb 2015 |
| US 8,123,771 | Lapsed on the fee record Feb 2016 | Feb 2016 |
8 of 52 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 |
|---|---|---|---|
| Jan 7, 2004 Reel 15410, frame 124 | Koike, Masufumi; Fukuzawa, Masahiro | Arkray, 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 1295 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
9
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.