Term ends Jun 10, 2031 · Low confidence
20-year base term ends Jun 10, 2031
Reissue of US 10,622,554, which was surrendered when this reissue was granted; its term and maintenance fees continue here.
Held by Everspin Technologies, Inc.
Filed Apr 8, 2022 as application 17/658,470 · Granted Mar 4, 2025
Base term, 20 years from filing
Today
2011
2031
Clock starts
Jun 10, 2011
Jun 10, 2011
Term ends
Jun 10, 2031
Jun 10, 2031
Granted
Mar 4, 2025
Mar 4, 2025
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,199,574, US 10,347,828, US 9,418,208, to Jun 10, 2031. The term already ends on or before that date, so the cap shortened nothing.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from the original patent's grant (Apr 14, 2020). This counts the ones the record shows paid.
9
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 resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 1 of 3 maintenance fees is paid so far. Confidence: Low. 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 Jun 10, 2011, when application 13/158,171, the earliest non-provisional in its chain, was filed (this one was filed Apr 8, 2022) | Jun 10, 2031 | High confidence |
| Continuity chain | A reissue: its term follows the original patent's, with the original's term adjustment | follows the original patent | Medium confidence |
| Patent term adjustment | No term adjustment record on a grant after 2005, so none is added | no change | Medium confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,199,574, US 10,347,828, US 9,418,208) | resolves to Jun 10, 2031, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 10, 2031 | Low confidence |
This family
| US 8,686,484 | In force Dec 2031 | Dec 2031 |
| US 9,159,906 | In force Jun 2031 | Jun 2031 |
| US 9,553,258 | In force no later than Jun 2031 | no later than Jun 2031 |
| US 9,947,865 | In force Jun 2031 | Jun 2031 |
| US 10,199,574 | In force Jun 2031 | Jun 2031 |
| US 10,347,828 | In force Jun 2031 | Jun 2031 |
| US 10,622,554 | Surrendered on reissue Mar 2025 | Mar 2025 |
| US RE50,331 | this patent Jun 2031 | Jun 2031 |
8 of 9 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Jun 18, 2024 Reel 67758, frame 929 | Whig, Renu; Slaughter, Jon; Rizzo, Nicholas; Sun, Jijun; Mancoff, Frederick; Houssameddine, Dimitri | Everspin Technologies, Inc. | 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
Jun 2031
Term ends Jun 10, 2031. No further fees fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,199,574, US 10,347,828, US 9,418,208, ends no earlier than this term, so it caps nothing.
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.