Term ends Apr 11, 2041 · High confidence
20-year base term ends Jan 26, 2041
Held by The Eastern Company
Filed Jan 26, 2021 as application 17/158,606 · Granted Jul 11, 2023
Base term plus 75 days of patent term adjustment (USPTO delay)
Today
2021
2041
Clock starts
Jan 26, 2021
Jan 26, 2021
Term ends
Apr 11, 2041
Apr 11, 2041
Granted
Jul 11, 2023
Jul 11, 2023
base term
patent term adjustment
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
75
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 12,049,778, to Apr 11, 2041. The term already ends on or before that date, so the cap shortened nothing.
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.
5
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 75 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 26, 2021, when this application, 17/158,606, was filed | Jan 26, 2041 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +75 days, USPTO patent term adjustment record | Apr 11, 2041 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 12,049,778) | resolves to Apr 11, 2041, no earlier than this term, so no change | 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 | Apr 11, 2041 | High confidence |
This family
| Application 62/967,840 | Provisional application no patent term | no patent term |
| US 11,697,958 | this patent Apr 2041 | Apr 2041 |
| Application 63/171,777 | Provisional application no patent term | no patent term |
| US 12,049,778 | In force Apr 2041 | Apr 2041 |
| US 12,584,342 | In force Jan 2041 | Jan 2041 |
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 |
|---|---|---|---|
| Jan 16, 2023 Reel 62385, frame 161 | Weinerman, Lee S.; Bernot, Reese; Braun, Keith; Paxitzis, James; Rosu, Marinel | The Eastern Company | 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
Apr 2041
Term ends Apr 11, 2041. Maintenance fees still fall due before then
Note
The 75 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 12,049,778, ends no earlier than this term, so it caps nothing.
Citations
4
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.