The Patent Finder
US

Voice Activity Detection/Silence Suppression System

US 8,909,519 Term ended
OverviewFamilyAssignmentsSources & methods

Term ended Sep 16, 2024 · Medium confidence

Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,577,674), so the cap could be lower.

Filed Mar 10, 2014 as application 14/202,640 · Granted Dec 9, 2014
Base term, 20 years from filing
Today
20 years from filing
Term ended Sep 16, 2024
2004 2026
Clock starts
Sep 16, 2004
Term ended
Sep 16, 2024
Granted
Dec 9, 2014
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,917,356, US 8,346,543, US 8,577,674, US 8,700,390, to Sep 16, 2024. The term already ends on or before that date, so the cap shortened nothing.
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.
8
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. 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 Sep 16, 2004, when application 10/942,518, the earliest non-provisional in its chain, was filed (this one was filed Mar 10, 2014)Sep 16, 2024High 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 7,917,356, US 8,346,543, US 8,577,674, US 8,700,390)resolves to Sep 16, 2024, no earlier than this term, so no changeMedium confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 2 maintenance fees paidterm endedHigh confidence
Computed term endThe steps above, in orderSep 16, 2024Medium confidence

This family

US 7,917,356In force
Feb 2028
Feb 2028
US 8,346,543Term ended
Sep 2024
Sep 2024
US 8,577,674Term ended
no later than Sep 2024
no later than Sep 2024
US 8,700,390Term ended
Sep 2024
Sep 2024
US 8,909,519this patent
Sep 2024
Sep 2024
US 9,009,034Lapsed on the fee record
Apr 2023
Apr 2023
US 9,224,405Lapsed on the fee record
Dec 2023
Dec 2023
US 9,412,396Lapsed on the fee record
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
Mar 10, 2014
Reel 32394, frame 846
Chen, Bing; James, James H.AT&T Corp.Assignment of Assignor's Interest
Mar 10, 2014
Reel 32395, frame 31
AT&T Corp.AT&T Properties, LLCAssignment of Assignor's Interest
Mar 10, 2014
Reel 32395, frame 145
AT&T Properties, LLCAT&T Intellectual Property II, L.P.Assignment of Assignor's Interest
Jul 19, 2019
Reel 49805, frame 451
AT&T Corp.AT&T Properties, LLCCorrective Assignment to Correct the Referenced Attachment a Previously Recorded at Reel: 032395 Frame: 0031. Assignor(S) Hereby Confirms the Assignment.
Jul 19, 2019
Reel 49805, frame 508
AT&T Properties, LLCAT&T Intellectual Property II, L.P.Corrective Assignment to Correct the Referenced Attachment a Previously Recorded at Reel: 032395 Frame: 0145. Assignor(S) Hereby Confirms the Assignment.
Nov 14, 2019
Reel 51005, frame 99
AT&T Intellectual Property II, L.P.Shopify, Inc.Assignment 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.

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