ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,448, issued on Nov. 11, was assigned to MPRC Products LLC (Cedar Rapids, Iowa).
"Railroad tank car manway nozzle assembly gasket" was invented by Robert Ridgway (Northbrook, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A gasket placed on a railroad tank car manway nozzle to extend the gasket's sealing integrity, durability and life. The gasket comprises an external gasket extension, a sealing surface contact portion, an internal gasket extension and a plurality of tabs on the external gasket extension. The sealing surface contact portion includes an enlarged mass portion which gets flattened under compression and extends linearly to provide a...