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:
Aug. 26, 1980
Filed:
Dec. 19, 1977
Applicant:
Inventors:
Yoichi Oba, Hachioji, JP;
Tsuyoshi Kano, Higashiyamato, JP;
Masaaki Hayashi, Kamakura, JP;
Hiroshi Takada, Yokohama, JP;
Katuzo Kanda, Oisomachi, JP;
Shusaku Eguchi, Minami-ashigara, JP;
Assignees:
Hitachi, Ltd., both of, JP;
Kasei Optonix, Ltd., both of, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ;
U.S. Cl.
CPC ...
427 64 ; 428407 ; 427 68 ; 427218 ; 427221 ;
Abstract
Pigment-coated phosphors which may be used in the production of a cathode-ray tube of a high contrast for a color television receiver can be produced by adding a pigment and an anionic polymer emulsion to an aqueous suspension of a phosphor and then making the system neutral or weakly acidic or adding a cationic polymer emulsion or carrying out both of these steps so that the phosphor and the pigment may be coated with the polymer.