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. 23, 1985
Filed:
Oct. 19, 1984
Applicant:
Inventors:
Assignee:
National Institute for Researches in Inorganic Materials, Ibaraki, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C / ;
U.S. Cl.
CPC ...
501 73 ; 106 97 ; 501 64 ;
Abstract
A process for preparing aluminosilicate glass comprising from 30 to 60 molar % of SiO.sub.2, from 20 to 35 molar % of Al.sub.2 O.sub.3 and from 10 to 30 molar % of a total of rare earth oxides composed mainly of Y.sub.2 O.sub.3, wherein an yttrium concentrate is used as the rare earth oxides composed mainly of Y.sub.2 O.sub.3, and ZrO.sub.2 not in excess of 8 molar % to improve alkali resistance.