Also listed on NXP USA, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 17, 2026 · High confidence
20-year base term ended Apr 11, 2026
Held by Sigmatel, LLC
Filed Apr 11, 2006 as application 11/402,648 · Granted Apr 21, 2015
Base term plus 220 days of patent term adjustment (USPTO delay)
Today
2006
2026
Clock starts
Apr 11, 2006
Apr 11, 2006
Term ends
Nov 17, 2026
Nov 17, 2026
Granted
Apr 21, 2015
Apr 21, 2015
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
220
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
This patent's term runs 220 days past its 20-year base term on prosecution delay. 2 of 2 maintenance fees are paid so far. 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 Apr 11, 2006, when this application, 11/402,648, was filed | Apr 11, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +220 days, USPTO patent term adjustment record | Nov 17, 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 | 2 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 17, 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 |
|---|---|---|---|
| Aug 11, 2006 Reel 18092, frame 15 | Holley, II, Roderick; Vargas, Raymond L.; Ferrara, John Gregory | Sigmatel, Inc., a Delaware Corporation | Assignment of Assignor's Interest |
| Jul 9, 2008 Reel 21212, frame 372 | Sigmatel, Inc. | Citibank, N.a. | Security Agreement |
| Mar 15, 2010 Reel 24085, frame 1 | Freescale Semiconductor, 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 |
| May 13, 2010 Reel 24397, frame 1 | Freescale Semiconductor, Inc. | Citibank, N.A., as 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 |
| Dec 21, 2015 Reel 37356, frame 553 | Citibank, N.A., as Collateral Agent | Freescale Semiconductor, Inc. | Patent Release |
| 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. |
| 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 |
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
Nov 2026
Term ends Nov 17, 2026. No further fees fall due before then
Note
The 220 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2015 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.