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:
Feb. 21, 2006
Filed:
Mar. 07, 2002
Hajime Itoh, Yokohama, JP;
Rei Kitamura, Yokohama, JP;
Mitsuyoshi Sakai, Chiba, JP;
Keito Sekine, Takasago, JP;
Misao Okada, Yokohama, JP;
Hajime Itoh, Yokohama, JP;
Rei Kitamura, Yokohama, JP;
Mitsuyoshi Sakai, Chiba, JP;
Keito Sekine, Takasago, JP;
Misao Okada, Yokohama, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
A process for producing a glass for cathode ray tubes, having a SbOcontent of from 0 to 0.19% as represented by mass percentage and containing HO, which process comprises a step of melting a raw material in an atmosphere under a pressure of Pto obtain a molten glass, and a step of vacuum degassing the molten glass in an atmosphere under a pressure Pwhich is lower than P, wherein the pressure P of the molten glass is made to be at most (6.1 W+0.06) atm in the vacuum degassing step, wherein W is the content of said HO as represented by mass percentage.