Collateral for a security interest recorded Jan 3, 2025 (Midcap Funding IV Trust).

Term ends Oct 25, 2031 · High confidence

Computed 20-year base term

Held by Arq Solutions (Es), Inc.

Filed Jan 23, 2015 as application 14/604,153 · Granted May 23, 2017

Base term, 20 years from filing

Today

20 years from filing

Term ends Oct 25, 2031

2011 2031

Clock starts
Oct 25, 2011

Term ends
Oct 25, 2031

Granted
May 23, 2017

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.

No effect

Terminal disclaimer

Resolved from the filed document, referencing US 8,951,487, to Oct 25, 2031. The term already ends on or before that date, so the cap shortened nothing.

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.

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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Oct 25, 2011, when application 13/281,066, the earliest non-provisional in its chain, was filed (this one was filed Jan 23, 2015)	Oct 25, 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	Disclaimer resolved from the filed document (refs US 8,951,487)	resolves to Oct 25, 2031, no earlier than this term, so no change	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	Oct 25, 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	this patent Oct 2031	Oct 2031
US 9,884,286	In force 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
Jan 23, 2015 Reel 34801, frame 954	Durham, Michael D.; Sjostrom, Sharon; Baldrey, Kenneth E.	Ada-Es, Inc.	Assignment of Assignor's Interest
Oct 26, 2015 Reel 36878, frame 72	Ada-Es, Inc.	Wilmington Trust, National Association, as Collateral Agent	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
Jan 14, 2019 Reel 47991, frame 693	Wilmington Trust, National Association	Ada-Es, Inc.	Release of Security 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

Oct 2031

Term ends Oct 25, 2031. Maintenance fees still fall due before then

Terminal disclaimer

A terminal disclaimer resolved from the filed document, referencing US 8,951,487, ends no earlier than this term, so it caps nothing.

Citations

later US patents cite this one

That is top 25% of utility patents granted in 2017 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.

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