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US 8,171,235 In force
OverviewFamilyAssignmentsSources & methods

Term ends Dec 6, 2026 · High confidence

Filed Jan 28, 2009 as application 12/361,301 · Granted May 1, 2012
Base term plus 370 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2005 2026
Clock starts
Dec 1, 2005
Term ends
Dec 6, 2026
Granted
May 1, 2012
base term patent term adjustment fee events Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
370
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,509,463, to Dec 6, 2026. The term already ends on or before that date, so the cap shortened nothing.
3 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.
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 370 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. All three maintenance fees are recorded paid; no more fees are due. 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 Dec 1, 2005, when application 11/291,307, the earliest non-provisional in its chain, was filed (this one was filed Jan 28, 2009)Dec 1, 2025High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+370 days, USPTO patent term adjustment recordDec 6, 2026High confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 7,509,463)resolves to Dec 6, 2026, no earlier than this term, so no changeHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events3 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderDec 6, 2026High confidence

This family

US 7,509,463In force
Dec 2026
Dec 2026
US 8,171,235this patent
Dec 2026
Dec 2026
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 26, 2011
Reel 27446, frame 1
Sony Computer Entertainment Inc.Sony Network Entertainment Platform Inc.Change of Name
Dec 27, 2011
Reel 27557, frame 1
Sony Network Entertainment Platform Inc.Sony Computer Entertainment Inc.Assignment of Assignor's Interest
Jul 1, 2016
Reel 39239, frame 356
Sony Computer Entertainment Inc.Sony Interactive Entertainment Inc.Change of Name

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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