The Patent Finder
US

Nearly Index-Matched Luminescent Glass-Phosphor Composites for Photonic Applications

US 10,746,374 In force
OverviewFamilyAssignmentsSources & methods

Term ends Jul 21, 2028 · High confidence

Filed Apr 27, 2018 as application 15/965,793 · Granted Aug 18, 2020
Base term, 20 years from filing
Today
20 years from filing
2008 2028
Clock starts
Jul 21, 2008
Term ends
Jul 21, 2028
Granted
Aug 18, 2020
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.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
8
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. 1 of 1 maintenance fees is 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 Jul 21, 2008, when application PCT/US2008/070621, the earliest non-provisional in its chain, was filed (this one was filed Apr 27, 2018)Jul 21, 2028High 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 events1 of 1 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderJul 21, 2028High confidence

This family

Application PCT/US2008/070621PCT application
no patent term
no patent term
Application 12/669,579Abandoned
not computed
not computed
US 8,791,631In force
Jul 2028
Jul 2028
US 8,598,778In force
Jul 2028
Jul 2028
US 9,078,332In force
Jul 2028
Jul 2028
US 9,420,664In force
Jul 2028
Jul 2028
Application 15/236,127Abandoned
not computed
not computed
US 10,746,374this patent
Jul 2028
Jul 2028
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 8, 2018
Reel 46033, frame 249
Allen, Steven C.; Steckl, Andrew J.University of CincinnatiAssignment of Assignor's Interest
Jun 8, 2018
Reel 46033, frame 257
University of CincinnatiQuarkstar 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