Collateral for a security interest recorded Dec 19, 2025 (Morgan Stanley Senior Funding, Inc.).
Term ends Aug 26, 2041 · High confidence
20-year base term ends Aug 26, 2041
Held by Perimeter Solutions, LP
Filed Jun 21, 2022 as application 17/845,569 · Granted Mar 14, 2023
Base term, 20 years from filing
Today
2021
2041
Clock starts
Aug 26, 2021
Aug 26, 2021
Term ends
Aug 26, 2041
Aug 26, 2041
Granted
Mar 14, 2023
Mar 14, 2023
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 11,395,934, to Aug 26, 2041. The term already ends on or before that date, so the cap shortened nothing.
1 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.
18
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. 1 of 3 maintenance fees is 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 Aug 26, 2021, when application 17/458,002, the earliest non-provisional in its chain, was filed (this one was filed Jun 21, 2022) | Aug 26, 2041 | 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 11,395,934) | resolves to Aug 26, 2041, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Aug 26, 2041 | High confidence |
This family
| US 11,395,934 | In force Aug 2041 | Aug 2041 |
| US 11,420,084 | In force Dec 2041 | Dec 2041 |
| US 11,602,658 | this patent Aug 2041 | Aug 2041 |
| US 11,628,324 | In force Dec 2041 | Dec 2041 |
| US 11,865,391 | In force Aug 2041 | Aug 2041 |
| US 11,975,231 | In force Dec 2041 | Dec 2041 |
| US 11,883,703 | In force Aug 2041 | Aug 2041 |
| US 11,865,392 | In force Aug 2041 | Aug 2041 |
8 of 18 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 |
|---|---|---|---|
| Jun 28, 2022 Reel 60335, frame 979 | Hulbert, Dennis; Burnham, Robert J.; Schnarr, Michael S.; Geissler, Gerald; McLellan, Joseph | FRS Group, LLC | Assignment of Assignor's Interest |
| Jun 28, 2022 Reel 60336, frame 1 | Wilkening, David | FRS Group, LLC | Assignment of Assignor's Interest |
| Jun 6, 2023 Reel 63868, frame 441 | FRS Group LLC | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Interest |
| Jun 2, 2025 Reel 71285, frame 944 | JPMorgan Chase Bank, N.A. as Collateral Agent | FRS Group LLC | Release of Security Interest |
| Sep 2, 2025 Reel 72791, frame 298 | Fortress North America, LLC; FRS Group LLC; Compass Minerals America Inc. | Perimeter Solutions, LP | Assignment of Assignor's Interest |
| Dec 19, 2025 Reel 74007, frame 465 | Perimeter Solutions LP | Morgan Stanley Senior Funding, Inc., as Administrative Agent | Patent Security Agreement |
| Jan 2, 2026 Reel 73353, frame 552 | Perimeter Solutions LP | U.S. Bank Trust Company, National Association, as Notes Collateral Agent | Security Interest |
| Jan 2, 2026 Reel 74174, frame 258 | Perimeter Solutions LP | U.S. Bank Trust Company, National Association, as Notes Collateral Agent | Notes Patent Security Agreement |
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
Aug 2041
Term ends Aug 26, 2041. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 11,395,934, ends no earlier than this term, so it caps nothing.
Citations
16
later US patents cite this one
That is top 5% of utility patents granted in 2023 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.