The Patent Finder
US

Membrane Electrode Assembly, Fuel Cell Using the Same and Manufacturing Method of Membrane Electrode Assembly

US 9,761,898 In force
OverviewFamilyAssignmentsSources & methods

Term ends Oct 29, 2031 · High confidence

Filed Mar 14, 2013 as application 13/823,513 · Granted Sep 12, 2017
Base term plus 359 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2010 2031
Clock starts
Nov 4, 2010
Term ends
Oct 29, 2031
Granted
Sep 12, 2017
base term patent term adjustment 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
359
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.
58
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 359 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Nov 4, 2010, when application PCT/JP2010/006503, the earliest non-provisional in its chain, was filed (this one was filed Mar 14, 2013)Nov 4, 2030High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+359 days, USPTO patent term adjustment recordOct 29, 2031High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderOct 29, 2031High confidence

This family

US 8,835,080Lapsed on the fee record
Sep 2026
Sep 2026
US 8,130,108In force
Apr 2029
Apr 2029
US 8,459,385Lapsed on the fee record
Jun 2025
Jun 2025
US 8,982,069In force
May 2032
May 2032
US 9,761,898this patent
Oct 2031
Oct 2031
Application 14/234,189Abandoned
not computed
not computed
US 9,461,312In force
Jan 2033
Jan 2033
US 9,431,661In force
Oct 2032
Oct 2032
8 of 58 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
Mar 18, 2013
Reel 30026, frame 806
Tsubosaka, Kenji; Yoshikawa, Hiroo; Nakanishi, JunjiToyota Jidosha Kabushiki KaishaAssignment of Assignor's Interest
Mar 22, 2013
Reel 30066, frame 190
Tsubosaka, Kenji; Yoshikawa, Hiroo; Nakanishi, JunjiToyota Jidosha Kabushiki KaishaAssignment 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