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US

Single or Multi-Fire Semi-Automatic Perforation System and Methods of Use

US 11,846,164 In force
OverviewFamilyAssignmentsSources & methods

Term ends Apr 18, 2043 · High confidence

Filed Apr 18, 2023 as application 18/302,628 · Granted Dec 19, 2023
Base term, 20 years from filing
Today
20 years from filing
2023 2043
Clock starts
Apr 18, 2023
Term ends
Apr 18, 2043
Granted
Dec 19, 2023
base term 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.
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.
5
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. 0 of 3 maintenance fees are paid so far. 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 Apr 18, 2023, when this application, 18/302,628, was filedApr 18, 2043High 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 events0 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderApr 18, 2043High confidence

This family

US 11,846,164this patent
Apr 2043
Apr 2043
Application PCT/US2023/019139PCT application
no patent term
no patent term
US 12,110,770In force
Apr 2043
Apr 2043
US 12,523,128In force
Apr 2043
Apr 2043
Application 19/420,249Pending
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
Apr 18, 2023
Reel 63366, frame 369
Blois, Stanley Jon; Griffin, Lawrence Gene; Janke, Ian Graham; Keyes, Cullen Craig; Jones, Gareth NicholasDefiant Engineering LLCAssignment of Assignor's Interest
Apr 12, 2024
Reel 67089, frame 847
Defiant Engineering, LLCGriffin, Lawrence G.; Rigdon, LarrySecurity Interest
Apr 12, 2024
reel/frame not recorded
Defiant Engineering, LLCGriffin, Lawrence G.Security Interest
Apr 12, 2024
reel/frame not recorded
Defiant Engineering, LLCRigdon, LarrySecurity Interest
Nov 5, 2025
Reel 73485, frame 616
Defiant Engineering, LLCDefiant Precision Technologies, LLCChange of Name
Nov 19, 2025
Reel 73606, frame 433
Defiant Engineering, LLCDefiant Precision Technologies, LLCChange of Name
May 4, 2026
Reel 74547, frame 676
Griffin, Lawrence G; Rigdon, LarryDefiant Precision Technologies, LLCRelease 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.

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