Term ends Apr 22, 2041 · Medium confidence
20-year base term ends Feb 18, 2041
Why Medium: A parent in the chain could not be resolved.
Held by Ticona LLC
Filed Jul 13, 2021 as application 17/374,299 · Granted Aug 15, 2023
Base term plus 63 days of patent term adjustment (USPTO delay)
Today
2021
2041
Clock starts
Feb 18, 2021
Feb 18, 2021
Term ends
Apr 22, 2041
Apr 22, 2041
Granted
Aug 15, 2023
Aug 15, 2023
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
63
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.
9
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 63 days past its 20-year base term on prosecution delay. 0 of 3 maintenance fees are paid so far. Confidence: Medium. 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 Feb 18, 2021, when applications 17/178,292, 17/178,295 and 17/178,312, the earliest non-provisional applications in its chain, were filed (this one was filed Jul 13, 2021); a parent in its chain could not be resolved (the next row) | Feb 18, 2041 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +63 days, USPTO patent term adjustment record | Apr 22, 2041 | 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 | Apr 22, 2041 | Medium confidence |
This family
| US 11,715,579 | In force May 2041 | May 2041 |
| US 11,702,539 | In force May 2041 | May 2041 |
| US 11,729,908 | In force Jan 2042 | Jan 2042 |
| Application PCT/US2021/019443 | PCT application no patent term | no patent term |
| US 12,522,716 | In force Jun 2042 | Jun 2042 |
| US 11,728,065 | this patent Apr 2041 | Apr 2041 |
| Application PCT/US2021/041513 | PCT application no patent term | no patent term |
| US 12,297,348 | In force Feb 2041 | Feb 2041 |
8 of 9 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 |
|---|---|---|---|
| Sep 16, 2021 Reel 57503, frame 611 | Kim, Young Shin | Ticona 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
Apr 2041
Term ends Apr 22, 2041. Maintenance fees still fall due before then
Note
The 63 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
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.