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US

Integrated Process for Generating Acid Anhydrides

US 12,637,405 In force
OverviewFamilyAssignmentsSources & methods

Also listed on Hyconix, Inc., an earlier holder on the record. The recorded assignments below show how it moved.

Term ends May 7, 2041 · Medium confidence

Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 12,358,860), so the cap could be lower.

Filed May 6, 2022 as application 17/738,607 · Granted May 26, 2026
Base term, 20 years from filing · capped by a resolved terminal disclaimer
Today
20 years from filing
2022 2042
Clock starts
May 6, 2022
Term ends
May 7, 2041
Granted
May 26, 2026
base term after the term ends 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
None
Term adjustment
No prosecution delay on this record.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 11,608,306, US 12,358,860, US 12,637,405.
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.
2
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 0 of 3 maintenance fees are paid so far. Confidence: Medium. 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 May 6, 2022, when this application, 17/738,607, was filedMay 6, 2042High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 11,608,306, US 12,358,860, US 12,637,405)capped to May 7, 2041Medium confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderMay 7, 2041Medium confidence

This family

US 12,637,405this patent
May 2041
May 2041
Application 19/659,869Pending
not computed
not computed
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
Jun 10, 2022
Reel 60344, frame 503
Gorke, Johnathan; Hashiguchi, Brian; Konnick, Michael; Kouba, Jay; Scher, Erik; Patt, Jeremy; Bjorklund, MaryHyconix, Inc.Assignment of Assignor's Interest
Apr 18, 2025
Reel 70885, frame 733
Hyconix, Inc.Cleantech Building Materials PLCAssignment 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.

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