The Patent Finder
US

Multi-Level File Digests

US 8,301,896 Term ended
OverviewFamilyAssignmentsSources & methods

Term ended Aug 2, 2024 · High confidence

USPTO later recorded it as expired for non-payment on Dec 2, 2024.

Filed Apr 23, 2010 as application 12/766,536 · Granted Oct 30, 2012
Base term plus 14 days of patent term adjustment (USPTO delay)
Today
20 years from filing
Term ended Aug 2, 2024
2004 2026
Clock starts
Jul 19, 2004
Term ended
Aug 2, 2024
Granted
Oct 30, 2012
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
14
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
2
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 runs 14 days past its 20-year base term on 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 Jul 19, 2004, when application 10/894,493, the earliest non-provisional in its chain, was filed (this one was filed Apr 23, 2010)Jul 19, 2024High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+14 days, USPTO patent term adjustment recordAug 2, 2024High 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 Dec 2, 2024, after the term endedno changeHigh confidence
Computed term endThe steps above, in orderAug 2, 2024High confidence

This family

US 7,707,427In force
May 2027
May 2027
US 8,301,896this patent
Aug 2024
Aug 2024
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
Feb 10, 2011
Reel 25786, frame 471
PSS Systems, Inc.Guardian Data Storage LLCAssignment of Assignor's Interest
Feb 10, 2011
Reel 25787, frame 109
Kenrich, Michael Frederick; Gutnik, YevgeniyPSS Systems, Inc.Assignment of Assignor's Interest
Jun 18, 2013
Reel 30638, frame 219
Guardian Data Storage, LLCIntellectual Ventures I LLCMerger

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