STIFLEX
RUBBER COMPOSITION, EITHER NATURAL, OR SYNTHETIC, REINFORCED WITH FIBERS USED FOR VARIOUS PURPOSES-NAMELY, FOR DRIVING OR CONVEYING BELTS, COTS, APRONS, ETC., WHICH RUBBER COMPOSITION IS GENERALLY SOLD IN THE FORM OF SLABS, TUBES, SHEETS, STRIPS, ETC.
Cancelled · July 22, 1944 · 71472510 ·