Also listed on Snapin Software Inc., an earlier holder on the record. The recorded assignments below show how it moved.

Term ends no later than May 25, 2027 · 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 Microsoft Technology Licensing, LLC

Filed Feb 7, 2007 as application 11/672,499 · Granted May 26, 2009

Base term plus 107 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Ends no later than May 25, 2027

2007 2027

Clock starts
Feb 7, 2007

Ends no later than
May 25, 2027

Granted
May 26, 2009

base term patent term adjustment 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

107

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

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.

This patent's term runs 107 days past its 20-year base term on 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 Feb 7, 2007, when this application, 11/672,499, was filed	Feb 7, 2027	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+107 days, USPTO patent term adjustment record	May 25, 2027	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 May 25, 2027	Medium confidence

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
Apr 13, 2007 Reel 19157, frame 668	Roundtree, Brian	Snapin Software Inc.	Assignment of Assignor's Interest
Mar 2, 2011 Reel 25885, frame 295	Snapin Software, Inc.	Nuance Communications, Inc.	Assignment of Assignor's Interest
Oct 17, 2023 Reel 65257, frame 821	Nuance Communications, Inc.	Microsoft Technology Licensing, LLC	Assignment of Assignor's Interest
Nov 13, 2023 Reel 65552, frame 934	Nuance Communications, Inc.	Microsoft Technology Licensing, LLC	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.

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Alerts on its grants, lapses and transfers.

What's changing

May 2027

Term ends no later than May 25, 2027. 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

Note

The 107 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Open question

A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than May 25, 2027. We will not guess the cap.

Citations

later US patents cite this one

That is top 10% of utility patents granted in 2009 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.

Method and System for Enhancing Voice Calls, Such as Enhancing Voice Calls with Data Services