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. 07, 1981
Filed:
Jan. 07, 1980
Applicant:
Inventors:
Assignee:
Corning Glass Works, Corning, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
106 52 ;
Abstract
This invention is concerned with sealing glasses exhibiting a coefficient of absorption of infra-red radiation within the range of 0.7-4 microns of at least 98%, an average coefficient of thermal expansion over the range of 20.degree.-300.degree. C. between 88-92.5.times.10.sup.-7 /.degree.C., and a volatilization of less than about 200 ppm at the sealing temperature, said glass being essentially free from K.sub.2 O and B.sub.2 O.sub.3 and consisting essentially, in weight percent on the oxide basis as calculated from the batch, of