Collateral for a security interest recorded Jun 19, 2013 (Firstmerit Bank, N.A.).
Term ended Oct 4, 2026 · High confidence
20-year base term ended Oct 4, 2026
Filed Nov 16, 2012 as application 13/679,846 · Granted Mar 10, 2015
Base term, 20 years from filing
Today
Term ended Oct 4, 2026
2006
2026
Clock starts
Oct 4, 2006
Oct 4, 2006
Term ended
Oct 4, 2026
Oct 4, 2026
Granted
Mar 10, 2015
Mar 10, 2015
base term
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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 8,118,177, to Oct 4, 2026. The term already ends on or before that date, so the cap shortened nothing.
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.
6
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. 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 4, 2006, when application 11/538,746, the earliest non-provisional in its chain, was filed (this one was filed Nov 16, 2012) | Oct 4, 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 | Disclaimer resolved from the filed document (refs US 8,118,177) | resolves to Oct 4, 2026, no earlier than this term, so no change | 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 4, 2026 | High confidence |
This family
| US 8,318,062 | In force Dec 2031 | Dec 2031 |
| Application 11/789,187 | Abandoned not computed | not computed |
| Application PCT/US2007/079896 | PCT application no patent term | no patent term |
| Application PCT/US2007/079908 | PCT application no patent term | no patent term |
| US 8,118,177 | In force Dec 2027 | Dec 2027 |
| US 8,973,762 | this patent Oct 2026 | Oct 2026 |
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 20, 2012 Reel 29332, frame 951 | Sellars, John C.; Sellars, William R.; Schutt, Thomas C. | Sellars Absorbent Materials, Inc. | Assignment of Assignor's Interest |
| Jun 19, 2013 Reel 30657, frame 571 | Sellars Absorbent Materials, Inc. | Firstmerit Bank, N.a. | Security Agreement |
| Jun 20, 2013 Reel 30663, frame 753 | Sellars Absorbent Materials, Inc. | Spell Capital Mezzanine Partners SBIC, LP | Security Agreement |
| Jun 21, 2013 Reel 30666, frame 364 | Sellars Absorbent Materials, Inc. | Spell Capital Mezzanine Partners SBIC, LP | Security Agreement |
| Jul 18, 2016 Reel 39375, frame 958 | Spell Capital Mezzanine Partners SBIC, LP | Sellars Absorbent Materials, Inc. | Release of Security Interest |
| Jul 18, 2016 Reel 39376, frame 903 | Spell Capital Mezzanine Partners SBIC, LP | Sellars Mezz Debt Investors, LLC | Change of Collateral Agent |
| Jan 23, 2020 Reel 51684, frame 141 | Sellars Absorbent Materials, Inc. | The Huntington National Bank | Security Interest |
| Mar 23, 2020 Reel 52207, frame 803 | Sellars Absorbent Materials, Inc. | Sellars Mezz Debt Investors, LLC | Amended and Restated Intellectual Property Security Agreement |
| May 7, 2021 Reel 56173, frame 220 | Sellars Mezz Debt Investors, LLC | Sellars Absorbent Materials, Inc. | Release of Security Interest |
| Jul 28, 2026 Reel 75416, frame 822 | Sellars Absorbent Materials, Inc. | The Huntington National Bank | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 8,118,177, 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 2015 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.