Term ends Sep 15, 2040 · High confidence
20-year base term ends Aug 11, 2040
Held by AdvanSix Resins & Chemicals LLC
Filed Apr 14, 2021 as application 17/230,278 · Granted Apr 9, 2024
Base term plus 35 days of patent term adjustment (USPTO delay)
Today
2020
2040
Clock starts
Aug 11, 2020
Aug 11, 2020
Term ends
Sep 15, 2040
Sep 15, 2040
Granted
Apr 9, 2024
Apr 9, 2024
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
35
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 35 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 11, 2020, when application 16/990,855, the earliest non-provisional in its chain, was filed (this one was filed Apr 14, 2021) | Aug 11, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +35 days, USPTO patent term adjustment record | Sep 15, 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 | Sep 15, 2040 | High confidence |
This family
| US 11,008,348 | In force Aug 2040 | Aug 2040 |
| US 11,952,394 | this patent Sep 2040 | Sep 2040 |
| US 12,459,963 | In force Aug 2040 | Aug 2040 |
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 |
|---|---|---|---|
| Oct 27, 2021 Reel 57940, frame 794 | Advansix Inc.; Advansix Resins & Chemicals LLC | Truist Bank, As Administrative Agent | Security Interest |
| Aug 14, 2026 Reel 76163, frame 178 | Advansix Inc.; Advansix Resins & Chemicals LLC | Citizens Bank, N.A., as Administrative Agent | Security Interest |
| Aug 14, 2026 Reel 76510, frame 1 | Truist Bank | Advansix Inc.; Advansix Resins & Chemicals LLC | Release of Security Interest |
| Aug 14, 2026 reel/frame not recorded | Truist Bank | Advansix Inc. | Release of Security Interest |
| Aug 14, 2026 reel/frame not recorded | Truist Bank | Advansix Resins & Chemicals LLC | Release of Security 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
Sep 2040
Term ends Sep 15, 2040. Maintenance fees still fall due before then
Note
The 35 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
14
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.