Patent information:

Patent:Utility 1,633,462
Patented:June 21, 1927
Applied:February 27, 1924
Title:Ceramic Insulating Material
Description:Clay mixture to produce a black porcelain body.
Assigned to:Star Porcelain Co.

Patentee Information:

SORTWELL, Harold H. Trenton, NJ

Class and subclass information:

Subclass:144CERAMIC COMPOSITIONS Clay containing (e.g., porcelain, earthenware, etc.) And flint or feldspar Kaolin (e.g., ball clay, fire clay, etc.) containing;

Known specimens:

None known