US Patent Issued to VALQUA on Sept. 22 for "Annular seal material and manufacturing method" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,500, issued on Sept. 22, was assigned to VALQUA LTD. (Tokyo).

"Annular seal material and manufacturing method" was invented by Naoki Osumi (Gojo, Japan), Tomomitsu Mochizuki (Gojo, Japan) and Miki Otsuka (Gojo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to an annular seal material comprising a core and an outer layer covering a periphery of the core, wherein the core and the outer layer comprises a crosslinked product of a crosslinkable rubber composition having a different color from each other either after hot press molding or after secondary crosslinking or both. According to the present invention, provide...