The judgment of the United States District Court for the District of South Carolina, 219 USPQ 223, holding that the Lindemann patent No. 3,708,388 (the 388 patent), assigned to appellee Air Products and Chemicals, Inc. (Air Products), is not invalid, is enforceable, and is infringed by the products of appellants Chas. S. Tanner Co. and National Starch and Chemical Corp. (National), is affirmed.
