NATIONAL
[ ACCELERATED WEATHERING AND FADING APPARATUS, BEING APPARATUS FOR TESTING OR DETERMINING THE EFFECT OF LIGHT, WATER, MOISTURE, TEMPERATURE, ATMOSPHERIC CONDITIONS, REFRIGERATION, HEAT, ETC., ON MATERIALS SUCH AS PAINTS, VARNISHES, LACQUERS, ASPHALT, RUBBER, TEXTILES, SYNTHETIC PLASTICS AND PROTECTIVE COATINGS, ON THE COLOR FASTNESS OF DYES, PIGMENTS, ETC., AND ARC LAMPS AND CARBONS USED IN SUCH APPARATUS; ] CARBONS FOR USE IN MOTION PICTURE PROJECTOR, MICROPROJECTOR, STEREOPTICON, PHOTOGRAPH...
Expired · July 3, 1947 · 71525926 ·