Patent information:

Patent:Utility 2,327,972
Patented:August 24, 1943
Applied:January 17, 1939
Title:High Strength Ceramic Surface
Description:Manufacturing method of using porcelain ""sand"" with a lower coefficient of expansion than the insulator body to rough up the surface and provide a strong cement joint without reducing the effectiveness of the compression glaze (see 2,337,691)
Category:Manufacturing
Assigned to:Lapp Insulator Co., Inc.

Patentee Information:

STETTINIUS, Kenneth E. Le Roy, NY
DEWEY, Benjamin F. Le Roy, NY

Class and subclass information:

Class:428STOCK MATERIAL OR MISCELLANEOUS ARTICLES
Subclass:149STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION, ETC.) Continuous and nonuniform or irregular surface on layer or component (e.g., roofing, etc.) Particulate matter Silicon containing;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:137AINSULATORS Coated;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:137RINSULATORS;
Class:428STOCK MATERIAL OR MISCELLANEOUS ARTICLES
Subclass:446COMPOSITE (NONSTRUCTURAL LAMINATE) Of silicon containing (not as silicon alloy);

Known specimens:

None known