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:
Nov. 30, 1993
Filed:
Jun. 14, 1991
Applicant:
Inventors:
Hirotaka Tomizawa, Saitama, JP;
Makoto Kanbara, Saitama, JP;
Narihiko Yoshimura, Saitama, JP;
Junichi Mitsui, Saitama, JP;
Hiroshi Hirano, Saitama, JP;
Assignee:
Tonen Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 73 ; 252 74 ; 252 75 ; 252 77 ; 252 781 ; 252572 ;
Abstract
An electro-rheological fluid comprising an electrically insulating liquid as the dispersion medium, porous solid particles as the dispersed phase, a dispersant, and a polyhydric alcohol having a boiling point of not lower than 250.degree. C., a melting point of not higher than 15.degree. C. and a viscosity of not higher than 300 cp (as measured at 20.degree. C.), or comprising an electrically insulating liquid as the dispersion medium, porous solid particles as the dispersed phase, a polyhydric alcohol and/or water, and an ashless dispersant.