ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,725, issued on Nov. 3, was assigned to Waukesha Bearings Corp. (Waukesha, Wis.).

"Composite structures for reciprocating gas compressor systems" was invented by Jie Zhou (Pearland, Texas) and David Donald Johnson III (Louisville, Ky.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A packing case assembly includes a packing cup configured to be disposed along a piston rod of a reciprocating gas compressor system; and a packing ring set disposed in the packing cup, the packing ring set including multiple rings. The packing ring set is configured to be disposed circumferentially around a portion of the length of the piston rod. A backup packing ring of t...