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. 05, 1982
Filed:
Nov. 03, 1980
Applicant:
Inventors:
James E Flannery, Corning, NY (US);
John L Stempin, Beaver Dams, NY (US);
Dale R Wexell, Corning, NY (US);
Assignee:
Corning Glass Works, Corning, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 32 ; 65 33 ; 65 45 ; 501 63 ;
Abstract
This invention relates to the manufacture of spontaneous opal glasses demonstrating a dense, milky-white appearance, excellent resistance to attack by water and detergents, softening points in excess of 760.degree. C., and containing either NaBaPO.sub.4 or Na.sub.5 P.sub.3 O.sub.10 as the predominant crystal phase. The glasses consist essentially, expressed in weight percent on the oxide basis, of 6-12% Na.sub.2 O, 5-16% BaO, 0.9-7% Al.sub.2 O.sub.3, 2-7% B.sub.2 O.sub.3, 55-70% SiO.sub.2, and 5-9% P.sub.2 O.sub.5.