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Azeotrope-Like Composition of 1,1,1,2,2,3,3-Heptafluoro-3-Methoxypropane and 1-Chloro-3,3,3-Trifluoropropene

US 8,790,539 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Jul 29, 2026 on the fee record · High confidence

Third maintenance fee unpaid; grace period ended.

Held by Arkema Inc.
Filed Sep 20, 2011 as application 13/237,024 · Granted Jul 29, 2014
Base term, 20 years from filing
Today
Lapsed Jul 29, 2026
2009 2029
Clock starts
Mar 6, 2009
No longer in force
Jul 29, 2026
Granted
Jul 29, 2014
Term would have run to
Mar 6, 2029
base term after the term ends 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
None
Term adjustment
No prosecution delay on this record.
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.
9
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 Mar 6, 2029: its 20-year base term, with no 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 Mar 6, 2009, when application PCT/US2009/036268, the earliest non-provisional in its chain, was filed (this one was filed Sep 20, 2011)Mar 6, 2029High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 3 maintenance fees paidlapsed Jul 29, 2026High confidence
Computed term endThe steps above, in orderJul 29, 2026High confidence

This family

Application PCT/US2009/036268PCT application
no patent term
no patent term
US 8,703,690In force
Dec 2030
Dec 2030
US 8,790,539this patent
Jul 2026
Jul 2026
Application PCT/US2012/054745PCT application
no patent term
no patent term
US 9,404,678In force
Apr 2029
Apr 2029
US 9,222,705In force
Jul 2029
Jul 2029
Application PCT/US2015/017032PCT application
no patent term
no patent term
US 10,077,388In force
no later than Mar 2029
no later than Mar 2029
8 of 9 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 18, 2011
Reel 27252, frame 971
Abbas, LaurentArkema Inc.Assignment of Assignor's Interest
Mar 18, 2014
Reel 32459, frame 312
Abbas, Laurent; Van Horn, Brett L.Arkema Inc.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 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