The Patent Finder
US

Device with Time Varying Signal

US 8,840,018 Term ended
OverviewFamilyAssignmentsSources & methods

Term ended May 5, 2026 · High confidence

USPTO later recorded it as expired for non-payment on Oct 26, 2026.

Held by CFPH, LLC
Filed Sep 13, 2012 as application 13/615,440 · Granted Sep 23, 2014
Base term, 20 years from filing
Today
20 years from filing
Term ended May 5, 2026
2006 2026
Clock starts
May 5, 2006
Term ended
May 5, 2026
Granted
Sep 23, 2014
base term after the term ends fee events 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.
None
Terminal disclaimer
No disclaimer on this record.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
26
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. 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 May 5, 2006, when application 11/418,939, the earliest non-provisional in its chain, was filed (this one was filed Sep 13, 2012)May 5, 2026High 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 2 maintenance fees paidterm endedHigh confidence
USPTO status recordRecorded as expired for non-payment on Oct 26, 2026, after the term endedno changeHigh confidence
Computed term endThe steps above, in orderMay 5, 2026High confidence

This family

US 7,644,861In force
Aug 2027
Aug 2027
US 7,549,576Term ended
May 2026
May 2026
US 8,939,359In force
Jul 2030
Jul 2030
Application PCT/US2007/066873PCT application
no patent term
no patent term
Application PCT/US2008/057239PCT application
no patent term
no patent term
US 8,403,214In force
Jan 2027
Jan 2027
US 8,899,477Term ended
Sep 2026
Sep 2026
US 8,840,018this patent
May 2026
May 2026
8 of 26 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 12, 2014
Reel 33511, frame 495
Gelman, Geoffrey M.; Rushin, Ronald; Alderucci, Dean P.; Asher, Joseph M.CFPH, LLCAssignment 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 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited