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:
Sep. 03, 1991
Filed:
Oct. 20, 1989
Applicant:
Inventors:
Takashi Numata, Chiba, JP;
Yusuke Kobayashi, Komae, JP;
Yoshihito Katayama, Tokyo, JP;
Junichi Iura, Yokohama, JP;
Toshiyasu Kawaguchi, Atsugi, JP;
Tsunehiko Sugawara, Chiba, JP;
Assignee:
Asahi Glass Company Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313479 ; 313450 ; 3134 / ; 313364 ; 313313 ; 315 85 ; 358245 ;
Abstract
A cathode ray tube has an insulating layer formed at at least a part of the outer surface of a neck tube. The insulating layer is a layer obtained by coating and baking a sol prepared by dispersing one or two or more metal alkoxides and metal salts in a hydrophilic oligomer state by adding water and an acid to a solution having one or two or more metal alkoxides and metal salts dissolved in an organic solvent such as an alcohol.