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:
Oct. 01, 1996
Filed:
Jun. 01, 1995
Applicant:
Inventors:
Katsutoshi Ohno, Tokyo, JP;
Tsuneo Kusunoki, Kanagawa, JP;
Kenichi Ozawa, Kanagawa, JP;
Kenji Takayanagi, Kanagawa, JP;
Shigeo Sasaki, Saitama, JP;
Akira Nishio, Saitama, JP;
Assignees:
Sony Corporation, Tokyo, JP;
Dainichiseika Color & Chemicals Mfg. Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G09C / ;
U.S. Cl.
CPC ...
427510 ; 106457 ; 359885 ;
Abstract
A minute-particle iron oxide red pigment slurry is formed by adding sodium silicate to a minute-particle iron oxide red pigment slurry, and used to form a red filter formed between a phosphor layer of a color cathode ray tube and a panel thereof. Therefore, even if the red filter is brought in contact with a black matrix under the condition of a process of manufacturing the color cathode ray tube at high temperature, the red filter does not discolor the black matrix.