71309841
Jan 12, 1931
May 26, 1931
SILICIUM CARBIDE, AN ELECTRIC FURNACE PRODUCT USED FOR ABRASIVE AND POLISHING PURPOSES AND FOR REFRACTORY PURPOSES, AND ABRASIVE AND POLISHING ARTICLES MANUFACTURED THEREFROM, SUCH AS GRINDING WHEELS, POLISHING STONES, AND DISCS
Lubricants and Fuels