Collateral for a security interest recorded Aug 5, 2024 (Wells Fargo Bank, National Association).

Term ends no later than Aug 29, 2028 · Medium confidence

Computed 20-year base term

In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.

Held by 8X8, Inc.

Filed Dec 23, 2013 as application 14/138,871 · Granted Aug 12, 2014

Base term, 20 years from filing

Today

20 years from filing

Ends no later than Aug 29, 2028

2008 2028

Clock starts
Aug 29, 2008

Ends no later than
Aug 29, 2028

Granted
Aug 12, 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.

Unresolved

Terminal disclaimer

On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.

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.

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 on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. 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.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Aug 29, 2008, when application 12/201,599, the earliest non-provisional in its chain, was filed (this one was filed Dec 23, 2013)	Aug 29, 2028	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	None on file	no change	High confidence
Terminal disclaimer cap	Disclaimer on file (approved), reference document not resolved	no cap applied, and none guessed	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	3 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	no later than Aug 29, 2028	Medium confidence

This family

US 8,275,116	In force Jul 2031	Jul 2031
Application PCT/US2009/054780	PCT application no patent term	no patent term
US 8,619,967	Lapsed on the fee record Dec 2025	Dec 2025
US 8,804,940	this patent no later than Aug 2028	no later than Aug 2028
US 9,049,297	In force Aug 2028	Aug 2028
US 9,307,088	In force Aug 2028	Aug 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.

Recorded	Assignor	Assignee	Conveyance
Feb 19, 2014 Reel 32243, frame 88	Southwick, Richard; Townsend, Robert; Salame, Mansour	Contactual, Inc.	Assignment of Assignor's Interest
Feb 19, 2014 Reel 32243, frame 184	Contactual, Inc.	8X8, Inc.	Assignment of Assignor's Interest
Aug 5, 2022 Reel 61085, frame 861	8X8, Inc.; Fuze, Inc.	Wilmington Savings Fund Society, FSB	Intellectual Property Security Agreement
Jan 26, 2024 Reel 66383, frame 936	8X8, Inc.; Fuze, Inc.	Wilmington Savings Fund Society, FSB	Corrective Assignment to Correct the Property Numbers Section to Remove Application Numbers 11265423, 11252205, 11240370, 11252276, and 11297182 Previously Recorded on Reel 061085 Frame 0861. Assignor(S) Hereby Confirms the Intellectual Property Security Agreement.
Aug 5, 2024 Reel 68327, frame 819	8X8, Inc.	Wells Fargo Bank, National Association, as Administrative Agent	Security Interest
Aug 5, 2024 Reel 68328, frame 569	Wilmington Savings Fund Society, FSB	8X8, Inc.; Fuze, Inc.	Release of Security Interest
Aug 5, 2024 reel/frame not recorded	Wilmington Savings Fund Society, FSB	8X8, Inc.	Release of Security Interest
Aug 5, 2024 reel/frame not recorded	Wilmington Savings Fund Society, FSB	Fuze, Inc.	Release of Security 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.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

What's changing

Aug 2028

Term ends no later than Aug 29, 2028. No further fees fall due before then

Note

A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed

Open question

A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Aug 29, 2028. We will not guess the cap.

Citations

later US patents cite this one

That is below the median of utility patents granted in 2014 in our data, the only group it is compared against. How we rank

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

This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. Related patents and pending applications may cover overlapping subject matter.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

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