Also listed on Arq Solutions, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Jan 3, 2025 (Midcap Funding IV Trust).
Term ends Feb 4, 2031 · High confidence
20-year base term ends Feb 4, 2031
Held by Arq Solutions (Es), Inc.
Filed Nov 23, 2015 as application 14/949,524 · Granted Feb 6, 2018
Base term, 20 years from filing
Today
2011
2031
Clock starts
Feb 4, 2011
Feb 4, 2011
Term ends
Feb 4, 2031
Feb 4, 2031
Granted
Feb 6, 2018
Feb 6, 2018
base term
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
2 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.
17
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 is its 20-year base term, with no adjustment for prosecution delay. 2 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 Feb 4, 2011, when application 13/021,427, the earliest non-provisional in its chain, was filed (this one was filed Nov 23, 2015) | Feb 4, 2031 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 4, 2031 | High confidence |
This family
| US 8,372,362 | In force Feb 2031 | Feb 2031 |
| US 8,524,179 | In force Oct 2031 | Oct 2031 |
| US 8,496,894 | In force Feb 2031 | Feb 2031 |
| US 8,951,487 | In force Oct 2031 | Oct 2031 |
| US 9,352,275 | In force Feb 2031 | Feb 2031 |
| US 9,221,013 | In force Feb 2031 | Feb 2031 |
| US 9,657,942 | In force Oct 2031 | Oct 2031 |
| US 9,884,286 | this patent Feb 2031 | Feb 2031 |
8 of 17 applications in this family shown, earliest filings first. 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 23, 2015 Reel 37122, frame 677 | Sjostrom, Sharon; Senior, Connie; Lagarenne, Jon | Ada-Es, Inc. | Assignment of Assignor's Interest |
| Dec 7, 2018 Reel 47742, frame 652 | Ada-Es, Inc. | The Bank of New York Mellon, as Administrative Agent | Notice of Grant of Security Interest in Patents |
| Oct 8, 2019 Reel 50657, frame 448 | French, Nina B.; Durham, Michael D.; Baldrey, Kenneth E.; Bisque, Ramon E. | Ada-Es, Inc. | Assignment of Assignor's Interest |
| Jun 4, 2021 Reel 56483, frame 657 | The Bank of New York Mellon, as Administrative Agent | Ada-Es, Inc. | Termination and Release of Security Interest in Patents |
| Feb 1, 2023 Reel 62622, frame 51 | Ada Carbon Solutions, LLC; Ada-Es, Inc. | CF Global Credit, LP | Patent Security Agreement |
| Feb 21, 2024 Reel 66643, frame 579 | Ada-Es, Inc. | Arq Solutions (Es), Inc. | Change of Name |
| Dec 27, 2024 Reel 69791, frame 980 | CF Global Credit, LP, as Administrative Agent | Arq Solutions, LLC (F/K/A Ada Carbon Solutions, LLC); Arq Solutions (Es), Inc. (F/K/A Ada-Es, Inc.) | Release of Security Interest |
| Dec 27, 2024 reel/frame not recorded | CF Global Credit, LP, as Administrative Agent | Arq Solutions, LLC (F/K/A Ada Carbon Solutions, LLC) | Release of Security Interest |
| Dec 27, 2024 reel/frame not recorded | CF Global Credit, LP, as Administrative Agent | Arq Solutions (Es), Inc. (F/K/A Ada-Es, Inc.) | Release of Security Interest |
| Jan 3, 2025 Reel 69817, frame 645 | Arq Solutions, LLC; Arq Solutions (Es), Inc. | Midcap Funding IV Trust | 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
Feb 2031
Term ends Feb 4, 2031. Maintenance fees still fall due before then
Citations
35
later US patents cite this one
That is top 10% of utility patents granted in 2018 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.