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Determining Concepts Associated with a Query

US 8,880,515 Grace period ended
OverviewFamilyAssignmentsSources & methods

Term ends Apr 24, 2028 · Low confidence

Grace period ended Nov 4, 2026 · no payment on record as of the Nov 10, 2026 fee file · lapse expected

Filed Sep 9, 2013 as application 14/021,989 · Granted Nov 4, 2014
Base term, 20 years from filing
Today
20 years from filing
2008 2028
Clock starts
Apr 24, 2008
Term ends
Apr 24, 2028
Granted
Nov 4, 2014
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,122,016, US 8,560,532, to Apr 24, 2028. The term already ends on or before that date, so the cap shortened nothing.
2 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.
3
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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 2 of 3 maintenance fees are paid so far. Confidence: Low: the grace period for its third maintenance fee ended Nov 4, 2026 with no payment on record. 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 24, 2008, when application 12/150,311, the earliest non-provisional in its chain, was filed (this one was filed Sep 9, 2013)Apr 24, 2028High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustmentNone on fileno changeHigh confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 8,122,016, US 8,560,532)resolves to Apr 24, 2028, no earlier than this term, so no changeHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee eventsThe grace period ended with no payment on record in the fee filegrace period ended Nov 4, 2026Low confidence
Computed term endThe steps above, in orderApr 24, 2028Low confidence

This family

US 8,122,016In force
May 2029
May 2029
US 8,560,532In force
Apr 2028
Apr 2028
US 8,880,515this patent
Apr 2028
Apr 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
Dec 2, 2013
Reel 31698, frame 299
Lamba, Digvijay Singh; Lam, Wang Chee; Tourn, Michel A.Wal-Mart Stores, Inc.Assignment of Assignor's Interest
Apr 2, 2018
Reel 45817, frame 115
Wal-Mart Stores, Inc.Walmart Apollo, 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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