US Patent Issued to United States Gypsum on May 20 for "Indicator for the sanding of joint compounds and spackles" (Illinois Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,303,935, issued on May 20, was assigned to United States Gypsum Co. (Chicago).

"Indicator for the sanding of joint compounds and spackles" was invented by Alexander J. Donovan (Lake Forest, Ill.), Joseph W. Schlude (Vernon Hills, Ill.) and Tyler Kincaid (Chicago).

According to the abstract* released by the U.S. Patent & Trademark Office: "Joint compounds and spackling compounds which comprise a sanding indicator, the compounds displaying a first color at the surface upon drying/hardening. Methods for finishing a substrate or patching a substrate, the methods comprise applying the joint compound which comprises the sanding indicator and/or the spackling compound which comprises the sa...