Maintenance fees coming due
11 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 20, 2026. Unpaid by Jun 21, 2027, that one lapses early.
A maintenance fee does not end a patent on its due date. It falls due at 3.5, 7.5
and 11.5 years from grant, and the patent lapses only if the fee is still unpaid at the end of the
six month grace period that follows.
| Patent | Title | Holder | Status | Fee due | Lapses if unpaid | Expires | Confidence |
|---|---|---|---|---|---|---|---|
| US 11,679,290 | Liquid Concentrate Fire Retardant Compositions Containing Mixtures of Ammonium Phosphates In force Fee due Dec 20, 2026 Lapses if unpaid Jun 21, 2027 · High confidence | Perimeter Solutions LP | In force | Dec 20, 2026 | Jun 21, 2027 | High confidence | |
| US 11,760,543 | Clamp Ring for Lid In force Fee due Mar 19, 2027 Lapses if unpaid Sep 20, 2027 · High confidence | Perimeter Solutions LP | In force | Mar 19, 2027 | Sep 20, 2027 | High confidence | |
| US 9,162,098 | Liquid Gel Concentrate Compositions and Methods of Use In force Fee due Apr 20, 2027 Lapses if unpaid Oct 20, 2027 · High confidence | Perimeter Solutions LP | In force | Apr 20, 2027 | Oct 20, 2027 | High confidence | |
| US 10,472,169 | Container Having Gate Valve In force Fee due May 12, 2027 Lapses if unpaid Nov 12, 2027 · High confidence | Perimeter Solutions LP | In force | May 12, 2027 | Nov 12, 2027 | High confidence | |
| US 11,819,722 | Long-Term Fire Retardant with Corrosion Inhibitors and Methods for Making and Using Same In force Fee due May 21, 2027 Lapses if unpaid Nov 22, 2027 · Medium confidence | Perimeter Solutions, LP | In force | May 21, 2027 | Nov 22, 2027 | Medium confidence | |
| US 11,819,723 | Long-Term Fire Retardant with Corrosion Inhibitors and Methods for Making and Using Same In force Fee due May 21, 2027 Lapses if unpaid Nov 22, 2027 · High confidence | Perimeter Solutions, LP | In force | May 21, 2027 | Nov 22, 2027 | High confidence | |
| US 11,865,391 | Long-Term Fire Retardant with Corrosion Inhibitors and Methods for Making and Using Same In force Fee due Jul 9, 2027 Lapses if unpaid Jan 10, 2028 · High confidence | Perimeter Solutions, LP | In force | Jul 9, 2027 | Jan 10, 2028 | High confidence | |
| US 11,865,392 | Long-Term Fire Retardant with Corrosion Inhibitors and Methods for Making and Using Same In force Fee due Jul 9, 2027 Lapses if unpaid Jan 10, 2028 · High confidence | Perimeter Solutions, LP | In force | Jul 9, 2027 | Jan 10, 2028 | High confidence | |
| US 11,883,703 | Long-Term Fire Retardant with Magnesium Sulfate and Corrosion Inhibitors and Methods for Making and Using Same In force Fee due Jul 30, 2027 Lapses if unpaid Jan 31, 2028 · High confidence | Perimeter Solutions, LP | In force | Jul 30, 2027 | Jan 31, 2028 | High confidence | |
| US 10,550,483 | Fire-Retardant Compositions and Their Uses In force Fee due Aug 4, 2027 Lapses if unpaid Feb 4, 2028 · High confidence | Perimeter Solutions LP | In force | Aug 4, 2027 | Feb 4, 2028 | High confidence | |
| 1 more maintenance fee coming due in the 12 months from Nov 14, 2026 · Pro | |||||||
10 of 11 patents shown. Soonest fee due date first, then patent number.
Pro members see every patent with a maintenance fee coming due: number, title, status, the due date, and the date it lapses if the fee goes unpaid through the grace period.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.