US Patent Issued to Basell Poliolefine Italia on May 6 for "Propylene polymer fibers" (Italian, Belgian, Spanish Inventors)

ALEXANDRIA, Va., June 10 -- United States Patent no. 12,291,628, issued on May 6, was assigned to Basell Poliolefine Italia S.r.l. (Milan).

"Propylene polymer fibers" was invented by Roberto De Palo (Ferrara, Italy), Jaume Marti Porqueres (Reus, Spain), Renaud Lemaire (Brussels) and Claudio Cavalieri (Ferrara, Italy).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process for preparing fibers made from or containing propylene homopolymer having: a melting point ranging from 150deg C. to 164deg C.; a fraction soluble in xylene at 25deg C. between 6.0 wt % and 2.0 wt %; a fraction soluble in acetone 25deg C. between 0.5 wt % and 2.0 wt %; a ratio fraction soluble in xylene at 25deg C./fraction soluble in aceto...