ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,603, issued on Jan. 28, was assigned to Hilti AG (Schaan, Liechtenstein).
"Fastening element with particle coating" was invented by Mareike Frensemeier (Buchs, Switzerland), Jens Kondratiuk (Buchs, Switzerland) and Arturo Guevara Arriola (Irving, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fastening element is provided, in particular an expansion anchor, having a bolt and a retainer arranged on the bolt for introducing tensile forces into the bolt, the bolt having a first metal friction surface and the retaining element having a second metal friction surface, which is associated with the first friction surface. A coating in which particle...