Collateral for a security interest recorded Dec 19, 2025 (Morgan Stanley Senior Funding, Inc.).
Term ends Sep 25, 2040 · High confidence
20-year base term ends Jun 5, 2040
Held by Perimeter Solutions, LP
Filed Mar 26, 2021 as application 17/213,770 · Granted Jan 17, 2023
Base term plus 112 days of patent term adjustment (USPTO delay)
Today
2020
2040
Clock starts
Jun 5, 2020
Jun 5, 2020
Term ends
Sep 25, 2040
Sep 25, 2040
Granted
Jan 17, 2023
Jan 17, 2023
base term
patent term adjustment
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
112
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
12
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 112 days past its 20-year base term on prosecution delay. 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 Jun 5, 2020, when application 16/894,214, the earliest non-provisional in its chain, was filed (this one was filed Mar 26, 2021) | Jun 5, 2040 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +112 days, USPTO patent term adjustment record | Sep 25, 2040 | 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 | 1 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 25, 2040 | High confidence |
This family
| US 10,960,249 | In force Jun 2040 | Jun 2040 |
| Application PCT/US2020/036360 | PCT application no patent term | no patent term |
| US 10,960,251 | In force Jun 2040 | Jun 2040 |
| US 11,607,570 | In force Jun 2040 | Jun 2040 |
| US 11,344,760 | In force no later than Jun 2040 | no later than Jun 2040 |
| US 11,554,279 | this patent Sep 2040 | Sep 2040 |
| US 11,554,280 | In force Jun 2040 | Jun 2040 |
| US 11,534,643 | In force Jun 2040 | Jun 2040 |
8 of 12 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 |
|---|---|---|---|
| Apr 29, 2021 Reel 56080, frame 84 | Hulbert, Dennis; Burnham, Robert J.; Schnarr, Michael S.; McLellan, Joseph; Geissler, Gerald | FRS Group, LLC | Assignment of Assignor's Interest |
| Apr 29, 2021 Reel 56080, frame 99 | 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
Sep 2040
Term ends Sep 25, 2040. Maintenance fees still fall due before then
Note
The 112 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
20
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.