ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,367, issued on Sept. 23, was assigned to Dow Global Technologies LLC (Midland, Mich.).
"Polyurethane rigid foam" was invented by Dakai Ren (Manvel, Texas) and William J. Harris (Lake Jackson, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A foam-forming composition for producing a rigid polyurethane foam including: (a) at least one isocyanate component; and (b) at least one isocyanate-reactive composition including: (bi) a rigid polyol compound; and (bii) a flexible polyol compound; (c) a catalyst package including at least one latent gelling catalyst; and (d) at least one blowing agent."
The patent was filed on Feb. 15, 2021, under Applicat...