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:
Oct. 03, 1995
Filed:
Nov. 03, 1994
Applicant:
Inventor:
Bob R Powell, Birmingham, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; H01B / ;
U.S. Cl.
CPC ...
501 17 ; 501 32 ; 501128 ; 1741 / ; 1741 / ;
Abstract
This invention relates to a lead-free ceramic insulator, such as that utilized in headlamp switching assemblies. The composition utilized to make the lead-free ceramic insulator includes low melting glasses which form low-viscosity liquids at low temperatures. The glasses generally contain alkali and/or alkaline earth oxides and boron oxide. Aluminum oxide may be added to compensate for the alkali and alkaline earth containing glasses which are sensitive to corrosion by water. The compositions have a low sintering temperature.