US 12,214,237 B2
Long-term fire retardant with corrosion inhibitors and methods for making and using same
Dennis Hulbert, Corvallis, MT (US); Robert J. Burnham, Stevensville, MT (US); Michael S. Schnarr, Roseville, CA (US); Gerald Geissler, Kailua-Kona, HI (US); David W. Wilkening, Ronan, MT (US); Joseph McLellan, Rocklin, CA (US); and Michael White, Roseville, CA (US)
Assigned to FRS Group, LLC, Rocklin, CA (US)
Filed by FRS Group, LLC, Rocklin, CA (US)
Filed on Jan. 4, 2024, as Appl. No. 18/404,387.
Application 18/404,387 is a continuation of application No. 18/404,027, filed on Jan. 4, 2024.
Application 18/404,027 is a continuation of application No. 18/299,525, filed on Apr. 12, 2023, granted, now 11,865,392.
Application 18/299,525 is a continuation of application No. 18/060,946, filed on Dec. 1, 2022, granted, now 11,865,391.
Application 18/060,946 is a continuation of application No. 17/821,060, filed on Aug. 19, 2022, granted, now 11,628,324, issued on Apr. 18, 2023.
Application 17/821,060 is a continuation of application No. 17/552,196, filed on Dec. 15, 2021, granted, now 11,420,084, issued on Aug. 23, 2022.
Claims priority of provisional application 63/140,657, filed on Jan. 22, 2021.
Claims priority of provisional application 63/125,693, filed on Dec. 15, 2020.
Prior Publication US 2024/0149091 A1, May 9, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A62D 1/00 (2006.01); A62C 3/02 (2006.01); C01F 5/40 (2006.01)
CPC A62D 1/005 (2013.01) [A62C 3/02 (2013.01); A62D 1/0007 (2013.01); A62D 1/0035 (2013.01); C01F 5/40 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A forest fire retardant final diluted product, comprising:
a mixture of phosphates comprising:
at least one of diammonium phosphate or monoammonium phosphate; and
at least one of disodium phosphate, monosodium phosphate, dipotassium phosphate, or monopotassium phosphate;
a corrosion inhibitor for at least one of steel, brass, aluminum, or magnesium, present in the final diluted product in an amount having a weight percent of about 0.02% to about 2.0% relative to total weight of the final diluted product; and
water;
wherein:
the final diluted product has a pH of about 6.0 to about 8.0; and
the final diluted product is intended for use to suppress, retard, or contain forest fires.