Term ends Feb 29, 2040 · High confidence
20-year base term ends Aug 18, 2037
Held by Versum Materials US, LLC
Filed Jan 27, 2022 as application 17/586,405 · Granted Dec 23, 2025
Base term plus 925 days of patent term adjustment (USPTO delay)
Today
2017
2040
Clock starts
Aug 18, 2017
Aug 18, 2017
Term ends
Feb 29, 2040
Feb 29, 2040
Granted
Dec 23, 2025
Dec 23, 2025
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
925
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.
7
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 925 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 Aug 18, 2017, when application 15/681,102, the earliest non-provisional in its chain, was filed (this one was filed Jan 27, 2022) | Aug 18, 2037 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +925 days, USPTO patent term adjustment record | Feb 29, 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 | Feb 29, 2040 | High confidence |
This family
| US 10,468,244 | In force Sep 2037 | Sep 2037 |
| Application PCT/US2017/048599 | PCT application no patent term | no patent term |
| US 11,017,998 | In force Aug 2037 | Aug 2037 |
| US 11,270,880 | In force Aug 2037 | Aug 2037 |
| Application 17/083,356 | Abandoned not computed | not computed |
| US 12,505,999 | this patent Feb 2040 | Feb 2040 |
| Application 19/429,899 | Pending not computed | not computed |
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
Feb 2040
Term ends Feb 29, 2040. Maintenance fees still fall due before then
Note
The 925 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
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.