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Compressed Air Energy Storage

US 9,243,558 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Jan 26, 2020 on the fee record · High confidence

First maintenance fee unpaid; grace period ended.

Filed Mar 13, 2012 as application 13/419,101 · Granted Jan 26, 2016
Base term, 20 years from filing, plus 853 days of patent term adjustment (USPTO delay)
Today
Lapsed Jan 26, 2020
2012 2034
Clock starts
Mar 13, 2012
No longer in force
Jan 26, 2020
Granted
Jan 26, 2016
Term would have run to
Jul 14, 2034
base term patent term adjustment after the term ends 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
853
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.
32
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 Jul 14, 2034: its 20-year base term plus 853 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 Mar 13, 2012, when this application, 13/419,101, was filedMar 13, 2032High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+853 days, USPTO patent term adjustment recordJul 14, 2034High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidlapsed Jan 26, 2020High confidence
Computed term endThe steps above, in orderJan 26, 2020High confidence

This family

US 9,243,558this patent
Jan 2020
Jan 2020
Application PCT/US2013/030991PCT application
no patent term
no patent term
Application PCT/US2013/030911PCT application
no patent term
no patent term
US 9,804,636In force
Jun 2033
Jun 2033
US 9,398,938Lapsed on the fee record
Jul 2020
Jul 2020
US 9,367,090In force
Jun 2033
Jun 2033
US 10,019,034In force
Mar 2033
Mar 2033
Application 15/173,644Abandoned
not computed
not computed
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 28824, frame 511
Samara-rubio, Dean; Samara-rubio, Elizabeth; Ackler, Harold; Moffat, RobertStorwatts, 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