Collateral for a security interest recorded Dec 8, 2022 (Wells Fargo Capital Finance, LLC).
Term ends Jul 20, 2038 · High confidence
20-year base term ends Jun 8, 2038
Filed May 12, 2021 as application 17/318,494 · Granted Feb 14, 2023
Base term plus 73 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2018
2038
Clock starts
Jun 8, 2018
Jun 8, 2018
Term ends
Jul 20, 2038
Jul 20, 2038
Granted
Feb 14, 2023
Feb 14, 2023
base term
patent term adjustment
fee events
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
73
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 11,376,534.
1 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.
5
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 73 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 3 maintenance fees is 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 Jun 8, 2018, when application 16/003,528, the earliest non-provisional in its chain, was filed (this one was filed May 12, 2021) | Jun 8, 2038 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +73 days, USPTO patent term adjustment record | Aug 20, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,376,534) | capped to Jul 20, 2038 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 20, 2038 | High confidence |
This family
| US 10,662,561 | In force no later than Sep 2038 | no later than Sep 2038 |
| US 11,376,534 | In force Jul 2038 | Jul 2038 |
| US 11,421,359 | In force Jul 2038 | Jul 2038 |
| US 11,578,438 | this patent Jul 2038 | Jul 2038 |
| US 11,674,247 | In force Jun 2038 | Jun 2038 |
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 16, 2022 Reel 61796, frame 451 | Yung, Wai-shing; Osborn, Scott E.; Schwier, Chris E.; Gopal, Vikram; Ortega, Albert | Ascend Performance Materials Operations LLC | Assignment of Assignor's Interest |
| Dec 8, 2022 Reel 62094, frame 172 | Ascend Performance Materials Operations LLC | Wells Fargo Capital Finance, LLC | Security Interest |
| Apr 10, 2025 Reel 70811, frame 705 | Bank Of America, N.a. | Wilmington Savings Fund Society, FSB | Security Interest |
| Dec 19, 2025 Reel 74007, frame 183 | Ascend Performance Materials Operations LLC | Wells Fargo Bank, National Association | Security Interest |
| Dec 23, 2025 Reel 74050, frame 90 | Wilmington Savings Fund Society, FSB | Ascend Performance Materials Operations LLC | Release of Security Interest |
| Dec 23, 2025 Reel 74056, frame 183 | Ascend Performance Materials Operations LLC | Wilmington Savings Fund Society, FSB | 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
Jul 2038
Term ends Jul 20, 2038. Maintenance fees still fall due before then
Note
The 73 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 11,376,534.
Citations
0
later US patents cite this one
That is below the median 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.