ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,238, issued on Feb. 3, was assigned to The Procter & Gamble Co. (Cincinnati).

"Dissolvable solid structure having first and second layers" was invented by Mark William Hamersky (Hamilton, Ohio), Jennifer Elaine Hilvert (Cincinnati), Min Mao (Cincinnati) and Dinah Achola Nyangiro (Cincinnati).

According to the abstract* released by the U.S. Patent & Trademark Office: "A dissolvable solid structure with a first layer and a second layer. The first layer includes from about 20% to about 100%, by weight of the first layer, of a first water-soluble polymer. The second layer includes from about 1% to about 50%, by weight of the second layer, of a second water-soluble polymer, a high melt...