71285291
Jun 8, 1929
Jul 22, 1930
CLEAR VISCOUS SOLUTIONS OR RESINS CONSISTING ESSENTIALLY OF AROMATIC SULPHONAMIDE REACTION PRODUCTS USED ALONE OR IN COMBINATION WITH OTHER MATERIALS TO FORM FILMS, THREADS, ARTIFICIAL SILK, LAMINATED GLASS, BINDING COMPOSITIONS, LACQUERS, VARNISHES, AND NATURAL-RESIN SUBSTITUTES
Chemicals