Collateral for a security interest recorded Aug 27, 2019 (Wells Fargo Capital Finance, LLC).
Term ends no later than Sep 30, 2038 · Medium confidence
20-year base term ends Jun 8, 2038
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Filed Jun 8, 2018 as application 16/003,528 · Granted May 26, 2020
Base term plus 114 days of patent term adjustment (USPTO delay)
Today
2018
2038
Clock starts
Jun 8, 2018
Jun 8, 2018
Ends no later than
Sep 30, 2038
Sep 30, 2038
Granted
May 26, 2020
May 26, 2020
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
114
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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 114 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. 1 of 3 maintenance fees is 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 Jun 8, 2018, when this application, 16/003,528, was filed | Jun 8, 2038 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +114 days, USPTO patent term adjustment record | Sep 30, 2038 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Sep 30, 2038 | Medium confidence |
This family
| US 10,662,561 | this patent 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 | In force 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 |
|---|---|---|---|
| Sep 5, 2018 Reel 46793, frame 883 | Yung, Wai-shing; Osborn, Scott E.; Schwier, Chris E.; Gopal, Vikram; Ortega, Albert | Ascend Performance Materials Operations LLC | Assignment of Assignor's Interest |
| Aug 27, 2019 Reel 50177, frame 150 | Ascend Performance Materials Operations LLC | Wells Fargo Capital Finance, LLC | Security Interest |
| Aug 28, 2019 Reel 50207, frame 184 | Ascend Performance Materials Operations LLC | Bank Of America, N.a. | 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
Sep 2038
Term ends no later than Sep 30, 2038. Maintenance fees still fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 114 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Sep 30, 2038. We will not guess the cap.
Citations
9
later US patents cite this one
That is top 25% of utility patents granted in 2020 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.