Patent information:

Patent:Utility 3,658,583
Patented:April 25, 1972
Applied:September 8, 1970
Title:Method for Producing Semi-Conducting Glaze Compositions for Electric Insulators
Description:RFI semi-conductive glaze formulas
Category:RFI
Assigned to:NGK Insulators, Ltd.

Patentee Information:

OGAWA, Yutaka ,, Japan

Class and subclass information:

Class:427COATING PROCESSES
Subclass:126.2ELECTRICAL PRODUCT PRODUCED Metallic compound coating Glass or ceramic base or coating;
Class:174ELECTRICITY: CONDUCTORS AND INSULATORS
Subclass:140CINSULATORS Combined With conductive arcing or stress distributing means Coated;
Class:438SEMICONDUCTOR DEVICE MANUFACTURING: PROCESS
Subclass:104 
Class:501COMPOSITIONS: CERAMIC
Subclass:134CERAMIC COMPOSITIONS Titanate, zirconate, stannate, niobate, or tantalate or oxide of titanium, zirconium, tin, niobium, or tantalum containing (e.g., dielectrics, etc.);

Known specimens:

None known

Drawings:

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