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Light Emitting Device

US 11,255,524 Lapsed on the fee record
OverviewFamilyAssignmentsSources & methods

Lapsed Feb 22, 2026 on the fee record · Medium confidence

Why Medium: A terminal disclaimer is on file (approved) with no resolved reference, so the term may end earlier.

First maintenance fee unpaid; grace period ended.

Filed May 29, 2020 as application 16/887,948 · Granted Feb 22, 2022
Base term, 20 years from filing
Today
Lapsed Feb 22, 2026
2013 2033
Clock starts
Mar 15, 2013
No longer in force
Feb 22, 2026
Granted
Feb 22, 2022
Term would have run to
Mar 15, 2033
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.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
0 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.
6
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

Its term would have run to Mar 15, 2033: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 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 Mar 15, 2013, when application 13/834,246, the earliest non-provisional in its chain, was filed (this one was filed May 29, 2020)Mar 15, 2033High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer on file (approved), reference document not resolvedno cap applied, and none guessedMedium confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events0 of 2 maintenance fees paidlapsed Feb 22, 2026High confidence
Computed term endThe steps above, in orderFeb 22, 2026Medium confidence

This family

US 9,166,116In force
May 2033
May 2033
US 9,741,699In force
no later than Mar 2033
no later than Mar 2033
US 10,247,395In force
no later than Mar 2033
no later than Mar 2033
US 10,670,244In force
no later than Mar 2033
no later than Mar 2033
US 11,255,524this patent
Feb 2026
Feb 2026
US 11,808,436In force
Mar 2033
Mar 2033
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
Dec 12, 2024
Reel 69604, frame 414
Epistar CorporationEdisonled 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.

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