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:
Sep. 15, 1987
Filed:
Oct. 09, 1985
Applicant:
Inventors:
Shushichi Yoshimura, Kitakyushu, JP;
Yasunori Hiwatashi, Kitakyushu, JP;
Hiromu Kobayashi, Kitakyushu, JP;
Hozo Yamazaki, Kitakyushu, JP;
Nobu Nishino, Iwaki, JP;
Teruji Tahara, Yokohama, JP;
Hidenobu Kobayashi, Kitakyushu, JP;
Assignee:
Mitsubishi Chemical Industries Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
423461 ; 209270 ; 209379 ; 210748 ; 210785 ;
Abstract
A process for purifying carbon black which contains solid impurities by removing the solid impurities thererom, which process comprises suspending said carbon black uniformly in water to obtain a carbon black aqueous slurry and subjecting the slurry to sieving treatment by an ultrasonic vibration sieving apparatus.