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. 05, 1976
Filed:
Jul. 26, 1974
Applicant:
Inventors:
Hiroshi Kawarada, Hirakata, JA;
Nobumasa Ohshima, Hirakata, JA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
427 64 ; 427 57 ; 427 66 ; 2523 / ;
Abstract
A method of making a manganese-activated zinc sulphide electroluminescent powder for D.C. excitation which contributes to a high electroluminescent brightness, high breakdown voltage and high uniformity and fineness of luminosity of the luminous area in an electroluminescent panel. The feature of this method is to fire a mixture of raw zinc sulphide powder and a manganese compound in an atmosphere of carbon disulphide with a carrier gas.