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Separator Provided with Asymmetrical Pore Structures for an Electrochemical Cell

US 7,709,140 In force
OverviewFamilyAssignmentsSources & methods

Term ends Jun 10, 2027 · High confidence

Filed May 25, 2005 as application 10/536,270 · Granted May 4, 2010
Base term plus 1312 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2003 2027
Clock starts
Nov 6, 2003
Term ends
Jun 10, 2027
Granted
May 4, 2010
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
1,312
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.
3
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 1312 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 Nov 6, 2003, when application PCT/EP2003/012384, the earliest non-provisional in its chain, was filed (this one was filed May 25, 2005)Nov 6, 2023High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+1312 days, USPTO patent term adjustment recordJun 10, 2027High 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 orderJun 10, 2027High confidence

This family

US 7,709,140this patent
Jun 2027
Jun 2027
US 8,597,819Lapsed on the fee record
Dec 2025
Dec 2025
2 of 3 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
Feb 6, 2008
Reel 20471, frame 633
Hennige, Volker; Hying, Christian; Hoerpel, Gerhard; Novak, Petr; Vetter, JensDegussa AGAssignment of Assignor's Interest
Feb 22, 2010
Reel 23985, frame 296
Evonik Degussa GmbHEvonik Degussa GmbHChange Address
Feb 22, 2010
Reel 23998, frame 937
Degussa AGDegussa GmbHChange of Entity
Feb 23, 2010
Reel 24006, frame 127
Degussa GmbHEvonik Degussa GmbHChange of Name
Jan 31, 2020
Reel 51765, frame 166
Evonik Degussa GmbHEvonik Operations GmbHChange of Name

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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