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 ended Oct 27, 2026 · High confidence
20-year base term ended Oct 27, 2026
Held by Arq Solutions (Es), Inc.
Filed Aug 4, 2011 as application 13/198,381 · Granted Oct 23, 2012
Base term, 20 years from filing
Today
Term ended Oct 27, 2026
2006
2026
Clock starts
Oct 27, 2006
Oct 27, 2006
Term ended
Oct 27, 2026
Oct 27, 2026
Granted
Oct 23, 2012
Oct 23, 2012
base term
after the term ends
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.
3 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.
9
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. All three maintenance fees were paid, so no fee lapse ended it. 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 Oct 27, 2006, when application 11/553,849, the earliest non-provisional in its chain, was filed (this one was filed Aug 4, 2011) | Oct 27, 2026 | 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 | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Oct 27, 2026 | High confidence |
This family
| US 6,729,248 | Term ended Nov 2021 | Nov 2021 |
| US 6,773,471 | Term ended Jun 2021 | Jun 2021 |
| US 7,332,002 | Term ended Jun 2021 | Jun 2021 |
| US 8,919,266 | Term ended Nov 2025 | Nov 2025 |
| US 8,124,036 | In force Nov 2028 | Nov 2028 |
| US 8,439,989 | Term ended Feb 2022 | Feb 2022 |
| US 8,293,196 | this patent Oct 2026 | Oct 2026 |
| US 9,951,287 | Term ended Jan 2022 | Jan 2022 |
8 of 9 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 |
|---|---|---|---|
| Dec 20, 2011 Reel 27416, frame 650 | Baldrey, Kenneth E.; Sjostrom, Sharon; French, Nina Bergan; Durham, Michael D. | Ada Environmental Solutions, LLC | Assignment of Assignor's Interest |
| Dec 20, 2011 Reel 27416, frame 755 | Ada Environmental Solutions, LLC | Ada-Es, Inc. | Assignment of Assignor's Interest |
| Oct 23, 2015 Reel 36865, frame 55 | Ada-Es, Inc. | Wilmington Trust, National Association, as Collateral Agent | Security Interest |
| Jul 1, 2016 Reel 39064, frame 268 | Wilmington Trust, National Association | Ada-Es, Inc. | Release of Security 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 |
| 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.
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Alerts on its grants, lapses and transfers.
Citations
31
later US patents cite this one
That is top 25% of utility patents granted in 2012 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.