US Patent Issued to COLAS on May 5 for "Method for renovating a roadway and machine for simultaneous spreading of fibres and bitumen emulsion" (Michigan, Ohio Inventors)

ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,202, issued on May 5, was assigned to COLAS (Paris).

"Method for renovating a roadway and machine for simultaneous spreading of fibres and bitumen emulsion" was invented by Nelson K. Wesenberg (Ann Arbor, Mich.) and Jean-Paul Fort (Cincinnati).

According to the abstract* released by the U.S. Patent & Trademark Office: "In a method for renovating a roadway, a first tack coat including a bitumen emulsion, a second coat of fibres and then a third surface coat that is a "clean" bitumen emulsion or includes an anhydrous asphalt binder, is spread by a spreading machine from bottom to top and overlaid on the milled or planed roadway. The fibres are sprayed onto the tack coat and the spray...