Collateral for a security interest recorded Nov 6, 2023 (Wells Fargo Bank, National Association).
Lapsed Sep 7, 2025 on the fee record · High confidence
20-year base term ends Nov 10, 2035
First maintenance fee unpaid; grace period ended.
Filed Nov 13, 2019 as application 16/682,072 · Granted Sep 7, 2021
Base term, 20 years from filing
Today
Lapsed Sep 7, 2025
2015
2035
Clock starts
Nov 10, 2015
Nov 10, 2015
No longer in force
Sep 7, 2025
Sep 7, 2025
Granted
Sep 7, 2021
Sep 7, 2021
Term would have run to
Nov 10, 2035
Nov 10, 2035
base term
after the term ends
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,105,671, to Nov 10, 2035. The term already ends on or before that date, so the cap shortened nothing.
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.
4
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Nov 10, 2035: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Nov 10, 2015, when application 14/936,916, the earliest non-provisional in its chain, was filed (this one was filed Nov 13, 2019) | Nov 10, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,105,671) | resolves to Nov 10, 2035, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | lapsed Sep 7, 2025 | High confidence |
| Computed term end | The steps above, in order | Sep 7, 2025 | High confidence |
This family
| US 10,105,671 | In force Jul 2036 | Jul 2036 |
| US 10,507,449 | In force Nov 2035 | Nov 2035 |
| US 11,110,426 | this patent Sep 2025 | Sep 2025 |
| US 11,642,644 | In force Nov 2035 | Nov 2035 |
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 |
|---|---|---|---|
| Jun 4, 2021 Reel 56436, frame 683 | Aimone, Paul R.; Abouaf, Marc; Hogan, Patrick | H.C. Starck Inc. | Assignment of Assignor's Interest |
| Oct 31, 2023 Reel 65402, frame 530 | H.C. Starck Inc. | Coldwater Facility Holding, LLC | Assignment of Assignor's Interest |
| Nov 1, 2023 Reel 65415, frame 744 | Coldwater Facility Holding, LLC | H.C. Starck Solutions Coldwater, LLC | Change of Name |
| Nov 6, 2023 Reel 65472, frame 843 | H.C. Starck Solutions Coldwater, LLC; H.C. Starck Solutions Euclid, LLC | Wells Fargo Bank, National Association | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,105,671, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2021 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.