Term ends Jun 12, 2040 · High confidence
20-year base term ends Jan 31, 2040
Held by Epirus, Inc.
Filed Mar 24, 2023 as application 18/189,985 · Granted Dec 9, 2025
Base term plus 133 days of patent term adjustment (USPTO delay)
Today
2020
2040
Clock starts
Jan 31, 2020
Jan 31, 2020
Term ends
Jun 12, 2040
Jun 12, 2040
Granted
Dec 9, 2025
Dec 9, 2025
base term
patent term adjustment
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
133
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
10
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 runs 133 days past its 20-year base term on prosecution delay. 0 of 3 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 Jan 31, 2020, when application 16/779,036, the earliest non-provisional in its chain, was filed (this one was filed Mar 24, 2023) | Jan 31, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +133 days, USPTO patent term adjustment record | Jun 12, 2040 | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jun 12, 2040 | High confidence |
This family
| US 11,658,410 | In force Feb 2041 | Feb 2041 |
| Application PCT/US2020/021895 | PCT application no patent term | no patent term |
| US 11,211,703 | In force Jan 2040 | Jan 2040 |
| US 11,522,286 | In force Jan 2040 | Jan 2040 |
| Application PCT/US2022/014615 | PCT application no patent term | no patent term |
| US 11,616,295 | In force Jan 2040 | Jan 2040 |
| US 12,368,239 | In force Oct 2040 | Oct 2040 |
| US 12,494,575 | this patent Jun 2040 | Jun 2040 |
8 of 10 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 |
|---|---|---|---|
| Dec 26, 2024 Reel 69684, frame 188 | Marr,, Harry Bourne, JR.; Dower, William Griffin; Kultran, Denpol; Borisov, Michael Alex; Ligon, Ryan Scott; Buetow, Scott William; Carter, Ross Charles; Chaves, Jason Reis; Gray, Steven Deward | Epirus, 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jun 2040
Term ends Jun 12, 2040. Maintenance fees still fall due before then
Note
The 133 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
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.