Term ends Nov 18, 2040 · High confidence
20-year base term ends Nov 18, 2040
Held by Kerr Machine Co.
Filed Feb 10, 2022 as application 17/668,529 · Granted Feb 14, 2023
Base term, 20 years from filing
Today
2020
2040
Clock starts
Nov 18, 2020
Nov 18, 2020
Term ends
Nov 18, 2040
Nov 18, 2040
Granted
Feb 14, 2023
Feb 14, 2023
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.
1 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.
40
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. 1 of 3 maintenance fees is 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 Nov 18, 2020, when applications 16/951,605 and 16/951,741, the earliest non-provisional applications in its chain, were filed (this one was filed Feb 10, 2022) | Nov 18, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 18, 2040 | High confidence |
This family
| US 11,300,111 | In force Nov 2040 | Nov 2040 |
| US 11,162,479 | In force Nov 2040 | Nov 2040 |
| US 11,359,615 | In force no later than Nov 2040 | no later than Nov 2040 |
| US D1,061,819 | In force Feb 2040 | Feb 2040 |
| US 11,644,018 | In force Nov 2040 | Nov 2040 |
| US 11,578,711 | this patent Nov 2040 | Nov 2040 |
| US 11,859,611 | In force Nov 2040 | Nov 2040 |
| US 11,560,884 | In force Nov 2040 | Nov 2040 |
8 of 40 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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
Nov 2040
Term ends Nov 18, 2040. Maintenance fees still fall due before then
Citations
5
later US patents cite this one
That is top 25% of utility patents granted in 2023 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.