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. 15, 1991
Filed:
May. 04, 1988
Applicant:
Inventors:
Chikao Tanaka, Yokohama, JP;
Setsuro Ito, Yokohama, JP;
Yasumasa Nakao, Tokyo, JP;
Kei Maeda, Yokohama, JP;
Assignee:
Asahi Glass Company Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
501-5 ; 501 10 ;
Abstract
A method for producing a glass-ceramic article, which comprises crystallizing a glass article consisting essentially of from 40 to 60% by weight of SiO.sub.2, from 13 to 19% by weight of Al.sub.2 O.sub.3, from 0 to 6% by weight of B.sub.2 O.sub.3, from 8 to 16% by weight of MgO, from 2 to 6% by weight of CaO, from 3 to 9% by weight of ZnO, from 5 to 12% by weight of TiO.sub.2, from 0 to 3% by weight of Li.sub.2 O+Na.sub.2 O+K.sub.2 O, from 0 to 3% by weight of P.sub.2 O.sub.5 and from 0 to 2% by weight of ZrO.sub.2.