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Solid Oxide Fuel Cell Systems with Hot Zones Having Improved Reactant Distribution

US 8,614,023 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Dec 24, 2025 on the fee record · High confidence

Third maintenance fee unpaid; grace period ended.

Filed Oct 4, 2012 as application 13/645,054 · Granted Dec 24, 2013
Base term, 20 years from filing
Today
Lapsed Dec 24, 2025
2009 2029
Clock starts
Feb 6, 2009
No longer in force
Dec 24, 2025
Granted
Dec 24, 2013
Term would have run to
Feb 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.
3
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 Feb 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 Feb 6, 2009, when application 12/367,168, the earliest non-provisional in its chain, was filed (this one was filed Oct 4, 2012)Feb 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 Dec 24, 2025High confidence
Computed term endThe steps above, in orderDec 24, 2025High confidence

This family

US 8,304,122In force
Mar 2031
Mar 2031
US 8,614,023this patent
Dec 2025
Dec 2025
US 9,343,758In force
Nov 2029
Nov 2029
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
May 21, 2015
Reel 35748, frame 937
Protonex Technology CorporationSilicon Valley BankSecurity Agreement
Sep 28, 2015
Reel 36700, frame 203
Silicon Valley BankProtonex Technology CorporationRelease of Security Interest
Dec 21, 2018
Reel 47841, frame 877
Protonex Technology CorporationUpstart Power, Inc.Assignment of Assignor's Interest
Jan 14, 2019
Reel 47985, frame 93
Poshusta, Joseph C; Booten, Charles W; Martin, Jerry LProtonex Technology CorporationAssignment of Assignor's Interest
Jan 13, 2020
Reel 51497, frame 597
Upstart Power, Inc.Windsail Capital Fund, L.p.Security Interest
Apr 13, 2021
Reel 55899, frame 517
Windsail Capital Fund, L.p.Upstart Power, Inc.Release of Security 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.

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