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Separators for electrochemical cells

US 8,883,354 In force
OverviewFamilyAssignmentsSources & methods

Term ends Aug 10, 2029 · High confidence

Filed Jan 12, 2007 as application 11/652,948 · Granted Nov 11, 2014
Base term plus 941 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2007 2029
Clock starts
Jan 12, 2007
Term ends
Aug 10, 2029
Granted
Nov 11, 2014
base term patent term adjustment 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
941
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.
32
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 941 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Jan 12, 2007, when this application, 11/652,948, was filedJan 12, 2027High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+941 days, USPTO patent term adjustment recordAug 10, 2029High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events3 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderAug 10, 2029High confidence

This family

US 8,883,354this patent
Aug 2029
Aug 2029
Application PCT/US2011/001274PCT application
no patent term
no patent term
Application 13/744,702Abandoned
not computed
not computed
US 9,871,239In force
Jul 2028
Jul 2028
Application 15/130,660Abandoned
not computed
not computed
Application PCT/US2016/027910PCT application
no patent term
no patent term
Application PCT/US2016/041798PCT application
no patent term
no patent term
US 10,381,623In force
Apr 2036
Apr 2036
8 of 32 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
Aug 21, 2012
Reel 28822, frame 276
Optodot CorporationMadico, Inc.License
Sep 24, 2014
Reel 33809, frame 145
Carlson, Steven Allen; Anakor, Ifenna Kingsley; Farrell, Greg RobertOptodot CorporationAssignment of Assignor's Interest
Feb 11, 2016
Reel 37702, frame 410
Madico, Inc.Optodot CorporationAssignment of Assignor's Interest
Oct 13, 2021
Reel 57790, frame 713
Optodot CorporationUnited States Department of EnergyConfirmatory License
May 24, 2022
Reel 60000, frame 89
Optodot CorporationLG Energy Solution, Ltd.Nunc Pro Tunc Assignment

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 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited