US Patent Issued to Freedom Chemical on March 4 for "System and method for waterproofing railway structures" (California Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,207, issued on March 4, was assigned to Freedom Chemical Corp. (Foothill Ranch, Calif.).

"System and method for waterproofing railway structures" was invented by Jonathan Wolff Haydu (San Diego) and Kyle David Flanagan (Rancho Santa Margarita, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A waterproofing structure for a railway structure includes a waterproof membrane that is applied over a bed of the railway structure, and a membrane protection layer that is applied over the waterproof membrane. The membrane protection layer is an elastomeric foam that excludes a filler material. The membrane protection layer can be a polyurea foam applied ...