Term ends Jan 27, 2042 · High confidence
20-year base term ends May 8, 2040
Held by ST Equipment & Technology LLC
Filed Nov 5, 2021 as application 17/609,305 · Granted Jul 1, 2025
Base term plus 629 days of patent term adjustment (USPTO delay)
Today
2020
2042
Clock starts
May 8, 2020
May 8, 2020
Term ends
Jan 27, 2042
Jan 27, 2042
Granted
Jul 1, 2025
Jul 1, 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
629
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.
3
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 629 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 May 8, 2020, when application PCT/US2020/032098, the earliest non-provisional in its chain, was filed (this one was filed Nov 5, 2021) | May 8, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +629 days, USPTO patent term adjustment record | Jan 27, 2042 | 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 | Jan 27, 2042 | High confidence |
This family
| Application PCT/US2020/032098 | PCT application no patent term | no patent term |
| US 12,343,736 | this patent Jan 2042 | Jan 2042 |
| Application 19/236,240 | Pending 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 |
|---|---|---|---|
| Jan 19, 2024 Reel 66175, frame 984 | Barber, Natsuki; Flynn, Kyle P.; Gupta, Abhishek | Separation Technologies LLC | Assignment of Assignor's Interest |
| Nov 7, 2024 Reel 69183, frame 522 | Separation Technologies LLC | ST Equipment & Technology LLC | 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
Jan 2042
Term ends Jan 27, 2042. Maintenance fees still fall due before then
Note
The 629 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites 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.