Term ends Jul 7, 2027 · High confidence
20-year base term ended Aug 28, 2026
Held by Everspin Technologies, Inc.
Filed Aug 28, 2006 as application 11/511,691 · Granted Mar 10, 2009
Base term plus 313 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Aug 28, 2006
Aug 28, 2006
Term ends
Jul 7, 2027
Jul 7, 2027
Granted
Mar 10, 2009
Mar 10, 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
313
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 313 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 Aug 28, 2006, when this application, 11/511,691, was filed | Aug 28, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +313 days, USPTO patent term adjustment record | Jul 7, 2027 | 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 | Jul 7, 2027 | 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 28, 2006 Reel 18253, frame 566 | Rizzo, Nicholas D. | Freescale Semiconductor, Inc. | Assignment of Assignor's Interest |
| Feb 2, 2007 Reel 18855, frame 129 | Freescale Semiconductor, Inc.; Freescale Acquisition Corporation; Freescale Acquisition Holdings Corp.; Freescale Holdings (Bermuda) III, Ltd. | Citibank, N.A. as Collateral Agent | Security Agreement |
| Mar 9, 2009 Reel 22366, frame 467 | Freescale Semiconductor, Inc. | Everspin Technologies, Inc. | Assignment of Assignor's Interest |
| Jul 30, 2010 Reel 24767, frame 398 | Citibank, N.a. | Everspin Technologies, Inc. | Release of Security Interest |
| Jul 9, 2015 Reel 36084, frame 57 | Freescale Semiconductor, Inc. | Everspin Technologies, Inc. | Assignment of Assignor's Interest |
| Dec 21, 2015 Reel 37354, frame 225 | Citibank, N.A., as Collateral Agent | Freescale Semiconductor, Inc. | Patent Release |
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
Jul 2027
Term ends Jul 7, 2027. No further fees fall due before then
Note
The 313 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
163
later US patents cite this one
That is top 5% 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.