ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,163, issued on March 4.
"Method for patinating zinc surfaces and system therefor" was invented by Koos Jan Baas (Wellington, Fla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for patinating zinc surfaces of a structural element, including the steps of: providing a structural element with a zinc surface in a housing; providing an atmosphere around the zinc surface, wherein said atmosphere comprises carbon based gas and humidity; and heating the zinc surface for at least one hour, to provide a patinated zinc surface. The heating of the zinc surface occurs by heating the atmosphere to a temperature of at least 50deg ...