ALEXANDRIA, Va., June 9 -- United States Patent no. 12,648,579, issued on June 9, was assigned to Wm. Wrigley Jr. Co. (Chicago).

"Medium-chain-length polyhydroxyalkanoates and their use in chewing gum bases" was invented by Jingping Liu (Chicago), David R. Phillips (Chicago) and Richard Gross (Troy, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure is directed to medium chain length polyhydroxyalkanoate (mcl-PHA) copolymers, and to chewing gum bases and chewing gums comprising the mcl-PHA copolymers. In some instances, the mcl-PHA copolymers may partially or completely replace conventional petroleum-based gum base polymers, including elastomers, in the chewing gum and gum base. The c...