ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,762, issued on May 20, was assigned to AIGI ENVIRONMENTAL INC. (Jiangsu, China).
"Sealing packing" was invented by Jingwei Zhao (Jiangsu, China) and Jun Zhang (Jiangsu, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A sealing packing includes a core portion and a housing wrapped around the exterior of the core portion that has a rounded rectangular cross-sectional shape. The housing comprises a plurality of fiber threads woven together with each other and a barrier sealant filled between the plurality of fiber threads. Between the core portion and the housing, a lubricating layer covers the housing. The core portion has a cross-sectional area ...