Also listed on NXP USA, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Oct 22, 2019 (Morgan Stanley Senior Funding, Inc.).
Term ends Dec 3, 2026 · High confidence
20-year base term ended Feb 17, 2026
Held by Sigmatel, LLC
Filed Feb 17, 2006 as application 11/356,897 · Granted Dec 8, 2009
Base term plus 289 days of patent term adjustment (USPTO delay)
Today
2006
2026
Clock starts
Feb 17, 2006
Feb 17, 2006
Term ends
Dec 3, 2026
Dec 3, 2026
Granted
Dec 8, 2009
Dec 8, 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
289
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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 289 days past its 20-year base term on prosecution delay. 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.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Feb 17, 2006, when this application, 11/356,897, was filed | Feb 17, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +289 days, USPTO patent term adjustment record | Dec 3, 2026 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High 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 | Dec 3, 2026 | High 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 |
|---|---|---|---|
| Feb 17, 2006 Reel 17581, frame 179 | Schultz, Russell Alvin | Sigmatel, Inc. | Assignment of Assignor's Interest |
| Jul 9, 2008 Reel 21212, frame 372 | Sigmatel, Inc. | Citibank, N.a. | Security Agreement |
| Mar 16, 2010 Reel 24079, frame 406 | Sigmatel, LLC | Citibank, N.a. | Security Agreement |
| May 10, 2010 Reel 24358, frame 439 | Sigmatel, LLC | Citibank, N.A., as Notes Collateral Agent | Security Agreement |
| Jun 17, 2013 Reel 30628, frame 636 | Sigmatel, LLC | Citibank, N.A., as Notes Collateral Agent | Security Agreement |
| Nov 12, 2013 Reel 31626, frame 218 | Sigmatel, LLC | Citibank, N.A., as Notes Collateral Agent | Security Agreement |
| Dec 21, 2015 Reel 37355, frame 838 | Citibank, N.A., as Collateral Agent | Sigmatel, Inc. | Patent Release |
| Mar 7, 2016 Reel 38017, frame 58 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Security Agreement Supplement |
| Jul 14, 2016 Reel 39361, frame 212 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12092129 Previously Recorded on Reel 038017 Frame 0058. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
| Aug 15, 2016 Reel 39723, frame 777 | Citibank, N.A., as Collateral Agent | Sigmatel, LLC | Corrective Assignment to Correct the Assignee Name Previously Recorded at Reel: 037354 Frame: 0773. Assignor(S) Hereby Confirms the Patent Release. |
| May 9, 2017 Reel 42762, frame 145 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12681366 Previously Recorded on Reel 039361 Frame 0212. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
| May 9, 2017 Reel 42985, frame 1 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12681366 Previously Recorded on Reel 038017 Frame 0058. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
| Jul 26, 2017 Reel 43328, frame 351 | Sigmatel, LLC | NXP USA, Inc. | Merger |
| Aug 31, 2017 Reel 43735, frame 306 | Sigmatel, Inc. | Sigmatel, LLC | Change of Name |
| Sep 10, 2019 Reel 50745, frame 1 | Morgan Stanley Senior Funding, Inc. | NXP B.V. | Release of Security Interest |
| Oct 22, 2019 Reel 51029, frame 1 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12298143 Previously Recorded on Reel 042985 Frame 0001. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
| Oct 22, 2019 Reel 51029, frame 387 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12298143 Previously Recorded on Reel 039361 Frame 0212. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
| Oct 22, 2019 Reel 51030, frame 1 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12298143 Previously Recorded on Reel 038017 Frame 0058. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
| Oct 22, 2019 Reel 51145, frame 184 | NXP B.V. | Morgan Stanley Senior Funding, Inc. | Corrective Assignment to Correct the Remove Application 12298143 Previously Recorded on Reel 042762 Frame 0145. Assignor(S) Hereby Confirms the Security Agreement Supplement. |
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.
What's changing
Dec 2026
Term ends Dec 3, 2026. No further fees fall due before then
Note
The 289 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
5
later US patents cite this one
That is below the median 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
Computed patent terms end on the dates shown. 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.