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:
Dec. 14, 1993
Filed:
Dec. 31, 1992
Applicant:
Inventors:
Ronald E Karam, Towanda, PA (US);
Aaron Wold, East Greenwich, RI (US);
Assignee:
Osram Sylvania Inc., Danvers, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
2523 / ;
Abstract
A zinc sulfide precursor material having axially symmetric platelet-type particles for a copper-activated zinc sulfide electroluminescent phosphor is made by reacting zinc- and copper-containing species with hydrogen sulfide and hydrogen chloride gases in a low-temperature vapor state reaction to obtain copper-containing zinc sulfide particles.