Collateral for a security interest recorded May 12, 2026 (Fifth Third Bank, National Association).
Term ends Sep 17, 2032 · Low confidence
20-year base term ends Sep 17, 2032
Reissue of US 8,893,422, which was surrendered when this reissue was granted; its term and maintenance fees continue here.
Held by Zev Technologies, LLC
Filed Aug 31, 2015 as application 14/841,298 · Granted Apr 2, 2019
Base term, 20 years from filing
Today
2012
2032
Clock starts
Sep 17, 2012
Sep 17, 2012
Term ends
Sep 17, 2032
Sep 17, 2032
Granted
Apr 2, 2019
Apr 2, 2019
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.
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 the original patent's grant (Nov 25, 2014). This counts the ones the record shows paid.
4
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. All three maintenance fees are recorded paid; no more fees are due. 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 Sep 17, 2012, when application 13/621,713, the earliest non-provisional in its chain, was filed (this one was filed Aug 31, 2015) | Sep 17, 2032 | 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 | 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 | Sep 17, 2032 | Low confidence |
This family
| US 8,832,983 | In force Sep 2032 | Sep 2032 |
| US 8,893,422 | Surrendered on reissue Apr 2019 | Apr 2019 |
| US RE47,335 | this patent Sep 2032 | Sep 2032 |
| Application 16/369,500 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Aug 21, 2018 Reel 46647, frame 969 | Wolf, Alec Daniel | Zev Technologies, Inc. | Assignment of Assignor's Interest |
| Aug 30, 2018 Reel 46759, frame 454 | Zev Technologies, Inc. | Hi Zev, LLC | Security Interest |
| Aug 9, 2024 Reel 68237, frame 470 | Hi Zev, LLC | Zev Technologies, Inc. | Release of Security Interest |
| Aug 13, 2024 Reel 68471, frame 588 | Zev Technologies, Inc. | Zev Technologies, LLC | Assignment of Assignor's Interest |
| May 12, 2026 Reel 75562, frame 524 | Silencerco Weapons Research, LLC; Unity Tactical LLC; Zev Technologies, LLC; Syndicate Optics Research, LLC; Sicosyndicate, LLC | Fifth Third Bank, National Association | Security 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Sep 2032
Term ends Sep 17, 2032. No further fees fall due before then
Citations
17
later US patents cite this one
That is top 25% of utility patents granted in 2019 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.