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:
Jan. 25, 1977
Filed:
Apr. 19, 1972
Applicant:
Inventors:
Ronald K Stewart, Mount Clemens, MI (US);
Robert H Insley, Royal Oak, MI (US);
Assignee:
Champion Spark Plug Company, Toledo, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252521 ; 106 46 ;
Abstract
An improved resistor element especially suitable for use in spark plugs is disclosed. The resistor element is prepared from a stannic oxide-barium, calcium or strontium borate composition doped with from 1 to 18 percent tantalum pentoxide or 1/2 to 5 percent niobium pentoxide based on the total batch weight. A method for producing the element is also disclosed.