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. 20, 1985
Filed:
Nov. 22, 1983
Applicant:
Inventor:
Wolfgang Mehl, Geneva, CH;
Assignee:
International Toner Specialties, Ogden, UT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
430106 ; 4301066 ; 430109 ; 430110 ; 430111 ; 430138 ; 430903 ; 42840224 ;
Abstract
A novel magnetic, electrophotographic, development or toner powder is provided comprising essentially spherical particles with a diameter between 5 and 50.mu.. The particles contain small ferromagnetic particles, highly conducting carbon, at least 5% sublimable dyestuff and at least 4% of a surface active agent. The particles are preferably structured to have an inside nucleus zone containing dyestuff and surfactant and an outside shell zone which contains the magnetic material and the highly conducting carbon.