Collateral for a security interest recorded Jan 23, 2020 (The Huntington National Bank).
Term ends Mar 31, 2036 · High confidence
20-year base term ends Jun 29, 2035
Filed Jun 29, 2015 as application 14/754,157 · Granted May 15, 2018
Base term plus 276 days of patent term adjustment (USPTO delay)
Today
2015
2036
Clock starts
Jun 29, 2015
Jun 29, 2015
Term ends
Mar 31, 2036
Mar 31, 2036
Granted
May 15, 2018
May 15, 2018
base term
patent term adjustment
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
276
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
5
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 runs 276 days past its 20-year base term on 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 Jun 29, 2015, when this application, 14/754,157, was filed | Jun 29, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +276 days, USPTO patent term adjustment record | Mar 31, 2036 | 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 | Mar 31, 2036 | High confidence |
This family
| Application 62/020,267 | Provisional application no patent term | no patent term |
| US 9,968,228 | this patent Mar 2036 | Mar 2036 |
| Application PCT/US2015/038347 | PCT application no patent term | no patent term |
| US 10,342,396 | In force Jul 2035 | Jul 2035 |
| Application 16/506,213 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Aug 19, 2015 Reel 36358, frame 826 | Klein, Daniel Alan | Clack Corporation | Assignment of Assignor's Interest |
| Aug 19, 2015 Reel 36358, frame 624 | Sellars, Ryan; Ziegert, Thomas T. | Sellars Absorbent Materials, Inc. | Assignment of Assignor's Interest |
| Aug 19, 2015 Reel 36358, frame 882 | Clack Corporation | Sellars Absorbent Materials, Inc. | Assignment of Assignor's Interest |
| 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.
What's changing
Mar 2036
Term ends Mar 31, 2036. Maintenance fees still fall due before then
Note
The 276 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
10
later US patents cite this one
That is above the median 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.