Method of coating with lightweight aggregates
United States Patent 2495540
Inventors:
Nichols, Arthur S.
Prosser, Robert A.
Publication Date:
01/24/1950
Assignee:
ILLINOIS CLAY PRODUCTS COMPANY
Other Classes:
239/431, 106/DIG.003, 427/426, 239/543, 239/428
International Classes:
E04F21/12; E04F21/02