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:
Apr. 04, 1978
Filed:
Nov. 04, 1975
Hiroshi Takayama, Moriguchi, JA;
Tatsuo Aizawa, Osaka, JA;
Mita Industrial Company, Osaka, JA;
Abstract
A developer for electrostatic photography comprising as indispensable components a fine powder of a magnetic material and a binder resin, said developer consisting essentially of a dry blend of (A) substantially spherical particles of a composition comprising a medium of said binder resin and said fine powder dispersed in the binder resin medium and (B) a finely divided solid conducting agent having a particle size smaller than 1/10 of the size of the spherical particles (A), said spherical particles (A) having a crater-like rough surface, said finely divided solid conducting agent (B) being stuck to said spherical particles (A) through said crater-like rough surfaces thereof, and the volume resistivity of said dry blend being not higher than 1 .times. 10.sup.11 .OMEGA.-cm.