The Patent Finder
US

Lamp Device and Method to Retrofit a Lighting Fixture

US 7,845,832 In force
OverviewFamilyAssignmentsSources & methods
Collateral for a security interest recorded Apr 6, 2026 (PNC Bank, National Association).

Term ends May 7, 2027 · High confidence

Filed May 6, 2008 as application 12/115,849 · Granted Dec 7, 2010
Base term, 20 years from filing
Today
20 years from filing
2007 2027
Clock starts
May 7, 2007
Term ends
May 7, 2027
Granted
Dec 7, 2010
base term 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.
3 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.
6
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. All three maintenance fees are recorded paid; no more fees are due. 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 7, 2007, when application 11/745,126, the earliest non-provisional in its chain, was filed (this one was filed May 6, 2008)May 7, 2027High 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 events3 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderMay 7, 2027High confidence

This family

US 7,677,766In force
Dec 2027
Dec 2027
US D581,585Term ended
Nov 2022
Nov 2022
US D581,584Term ended
Nov 2022
Nov 2022
US 7,845,832this patent
May 2027
May 2027
US D598,162Term ended
Aug 2023
Aug 2023
Application 12/913,502Abandoned
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
Jul 31, 2008
Reel 21321, frame 910
Boyer, John D.LSI Industries, Inc.Assignment of Assignor's Interest
Apr 6, 2026
Reel 75366, frame 338
LSI Industries Inc.PNC Bank, National Association, as Administrative AgentSecurity 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