The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 1976
Filed:
Oct. 25, 1974
Applicant:
Inventor:
Francis H Dulin, Oakland Township, Oakland County, MI (US);
Assignee:
Champion Spark Plug Company, Toledo, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252516 ; 106 44 ; 264104 ;
Abstract
A method for producing a semi-conductor body is disclosed. The batch for the body is silicon carbide and reactive alumina. The batch is first dry ball milled with from 1/2 to 2% fatty acid and pressed into a shape. The shape is then fired either in air below 2300.degree.F. or in an inert gas atmosphere to a temperature from about 2000.degree. to 3000.degree.F., and for a time sufficiently long to produce a semi-conductor body having a specified apparent porosity. An impregnation step is also disclosed to achieve the specified apparent porosity.