Term ends Aug 9, 2043 · High confidence
20-year base term ends Jan 24, 2042
Held by Notark Corporation
Filed Jul 23, 2023 as application 18/262,574 · Granted Sep 29, 2026
Base term plus 562 days of patent term adjustment (USPTO delay)
Today
2022
2043
Clock starts
Jan 24, 2022
Jan 24, 2022
Term ends
Aug 9, 2043
Aug 9, 2043
Granted
Sep 29, 2026
Sep 29, 2026
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
562
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 562 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 Jan 24, 2022, when application PCT/US2022/070317, the earliest non-provisional in its chain, was filed (this one was filed Jul 23, 2023) | Jan 24, 2042 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +562 days, USPTO patent term adjustment record | Aug 9, 2043 | 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 | Aug 9, 2043 | High confidence |
This family
| Application 63/140,892 | Provisional application no patent term | no patent term |
| Application PCT/US2022/070317 | PCT application no patent term | no patent term |
| US 12,749,684 | this patent Aug 2043 | Aug 2043 |
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 |
|---|---|---|---|
| Nov 21, 2023 Reel 65635, frame 466 | Wei, Xiangyun; Tian, Jason; Flood, John; Mhetar, Vijay | Kraton Polymers LLC | Assignment of Assignor's Interest |
| Nov 21, 2023 Reel 65660, frame 192 | Kraton Polymers LLC | Kraton Corporation | Change of Name |
| Nov 26, 2023 Reel 65660, frame 747 | Kraton Corporation | Notark LLC | Assignment of Assignor's Interest |
| Jun 4, 2024 Reel 67608, frame 978 | Notark LLC | Notark Corporation | Certificate of Conversion |
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
Aug 2043
Term ends Aug 9, 2043. Maintenance fees still fall due before then
Note
The 562 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
We have no citation count for this patent yet. That is not the same as never having been cited.
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.