Term ends Dec 16, 2041 · High confidence
20-year base term ends Dec 14, 2041
Held by Notark Corporation
Filed Dec 14, 2021 as application 17/644,146 · Granted Jan 16, 2024
Base term plus 2 days of patent term adjustment (USPTO delay)
Today
2021
2041
Clock starts
Dec 14, 2021
Dec 14, 2021
Term ends
Dec 16, 2041
Dec 16, 2041
Granted
Jan 16, 2024
Jan 16, 2024
base term
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
2
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.
8
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 2 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 Dec 14, 2021, when this application, 17/644,146, was filed | Dec 14, 2041 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2 days, USPTO patent term adjustment record | Dec 16, 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 | Dec 16, 2041 | High confidence |
This family
| Application 63/130,130 | Provisional application no patent term | no patent term |
| US 11,873,369 | this patent Dec 2041 | Dec 2041 |
| Application 63/367,531 | Provisional application no patent term | no patent term |
| Application 63/375,895 | Provisional application no patent term | no patent term |
| Application 63/375,889 | Provisional application no patent term | no patent term |
| Application 18/344,988 | Pending not computed | not computed |
| Application 18/468,814 | Pending not computed | not computed |
| US 12,545,780 | In force Sep 2042 | Sep 2042 |
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 |
|---|---|---|---|
| Feb 4, 2022 Reel 58884, frame 435 | Tian, Jason; Reiter, Chad; Ding, Ruidong | Kraton Polymers LLC | Assignment of Assignor's Interest |
| Mar 18, 2022 Reel 59864, frame 455 | Kraton Chemical, LLC; Kraton Polymers LLC; Kraton Polymers U.S. LLC | Goldman Sachs Bank USA, as Collateral Agent | Security Interest |
| Nov 17, 2023 Reel 65617, frame 157 | 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 |
| Jul 24, 2024 Reel 68671, frame 836 | Goldman Sachs Bank USA, as Collateral Agent | Kraton Chemical, LLC; Kraton Corporation | Release of Security Interest in Patents |
| Jul 24, 2024 reel/frame not recorded | Goldman Sachs Bank USA, as Collateral Agent | Kraton Chemical, LLC | Release of Security Interest in Patents |
| Jul 24, 2024 reel/frame not recorded | Goldman Sachs Bank USA, as Collateral Agent | Kraton Corporation | Release of Security Interest in Patents |
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
Dec 2041
Term ends Dec 16, 2041. Maintenance fees still fall due before then
Note
The 2 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 2024 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.