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Drain Valve Device for Cleaning Water Tank, and Drain Valve for Drain Valve Device

US 8,510,876 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Aug 20, 2017 on the fee record · High confidence

First maintenance fee unpaid; grace period ended.

Held by Toto Ltd.
Filed Sep 28, 2009 as application 12/568,516 · Granted Aug 20, 2013
Base term, 20 years from filing, plus 785 days of patent term adjustment (USPTO delay)
Today
Lapsed Aug 20, 2017
2009 2031
Clock starts
Sep 28, 2009
No longer in force
Aug 20, 2017
Granted
Aug 20, 2013
Term would have run to
Nov 22, 2031
base term patent term adjustment after the term ends 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
785
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
23
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 Nov 22, 2031: its 20-year base term plus 785 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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Sep 28, 2009, when this application, 12/568,516, was filedSep 28, 2029High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+785 days, USPTO patent term adjustment recordNov 22, 2031High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidlapsed Aug 20, 2017High confidence
Computed term endThe steps above, in orderAug 20, 2017High confidence

This family

US 8,510,876this patent
Aug 2017
Aug 2017
US 8,235,353Lapsed on the fee record
Aug 2024
Aug 2024
US 8,534,318Lapsed on the fee record
Sep 2021
Sep 2021
Application 12/886,116Abandoned
not computed
not computed
US 8,745,772In force
Aug 2032
Aug 2032
US 9,062,444In force
Jun 2033
Jun 2033
US 8,695,126In force
Jul 2032
Jul 2032
US 10,648,164In force
Sep 2033
Sep 2033
8 of 23 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.
RecordedAssignorAssigneeConveyance
Nov 3, 2009
Reel 23462, frame 418
Sakemi, Koji; Morokuma, YoshihikoToto 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.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited