Lapsed Nov 12, 2025 on the fee record · High confidence
20-year base term ends Jul 9, 2030
Third maintenance fee unpaid; grace period ended.
Held by Toto Ltd.
Filed Jul 9, 2010 as application 12/833,532 · Granted Nov 12, 2013
Base term, 20 years from filing, plus 409 days of patent term adjustment (USPTO delay)
Today
Lapsed Nov 12, 2025
2010
2031
Clock starts
Jul 9, 2010
Jul 9, 2010
No longer in force
Nov 12, 2025
Nov 12, 2025
Granted
Nov 12, 2013
Nov 12, 2013
Term would have run to
Aug 22, 2031
Aug 22, 2031
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
409
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
34
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Aug 22, 2031: its 20-year base term plus 409 days of term adjustment for prosecution delay. 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 9, 2010, when this application, 12/833,532, was filed | Jul 9, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +409 days, USPTO patent term adjustment record | Aug 22, 2031 | 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 | 2 of 3 maintenance fees paid | lapsed Nov 12, 2025 | High confidence |
| Computed term end | The steps above, in order | Nov 12, 2025 | High confidence |
This family
| US 8,835,069 | Lapsed on the fee record Sep 2022 | Sep 2022 |
| US 8,580,459 | this patent Nov 2025 | Nov 2025 |
| US 8,667,621 | In force Jan 2033 | Jan 2033 |
| US 9,108,207 | In force Jun 2033 | Jun 2033 |
| US 9,175,460 | In force Feb 2033 | Feb 2033 |
| US 8,444,065 | Lapsed on the fee record May 2025 | May 2025 |
| US 9,328,491 | In force Jun 2034 | Jun 2034 |
| US 8,728,261 | Lapsed on the fee record May 2022 | May 2022 |
8 of 34 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 |
|---|---|---|---|
| Jul 9, 2010 Reel 24659, frame 916 | Akagi, Yousuke; Watanabe, Naoki; Saigan, Shuichiro; Isaka, Nobuo | Toto Ltd. | Assignment of Assignor's Interest |
| Feb 12, 2020 Reel 53125, frame 465 | Toto Ltd. | Morimura Sofc Technology Co., Ltd. | Split & Succession |
| Jun 2, 2020 Reel 52805, frame 902 | Toto Ltd. | Morimura Sofc Technology Co., Ltd. | Split and Succession |
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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 409 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2013 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.