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US 8,560,396 Term ended
OverviewSources & methods

Term ended Aug 25, 2017 · Medium confidence

Why Medium: A parent in the chain could not be resolved.

USPTO later recorded it as expired for non-payment on Nov 22, 2021.

Held by Tumbleweed Holdings LLC
Filed Dec 23, 2010 as application 12/977,764 · Granted Oct 15, 2013
Base term plus 220 days of patent term adjustment (USPTO delay)
Today
20 years from filing
Term ended Aug 25, 2017
1997 2026
Clock starts
Jan 17, 1997
Term ended
Aug 25, 2017
Granted
Oct 15, 2013
base term patent term adjustment 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
220
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.

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.
Step Input Date after this step Confidence
Base term, 20 years from filingClock starts Jan 17, 1997, when the earliest non-provisional application in its chain was filed (this one was filed Dec 23, 2010); a parent in its chain could not be resolved (the next row)Jan 17, 2017High confidence
Continuity chainA parent in the chain could not be resolveddated from this application's own claimMedium confidence
Patent term adjustment+220 days, USPTO patent term adjustment recordAug 25, 2017High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 1 maintenance fees paidterm endedHigh confidence
USPTO status recordRecorded as expired for non-payment on Nov 22, 2021, after the term endedno changeHigh confidence
Computed term endThe steps above, in orderAug 25, 2017Medium confidence

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.

Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.

Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

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