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. 26, 1994
Filed:
Dec. 13, 1991
Applicant:
Inventors:
J David Carlson, Cary, NC (US);
Keith D Weiss, Cary, NC (US);
Joseph E Bares, Bartlesville, OK (US);
Assignee:
Lord Corporation, Erie, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 74 ; 252 73 ; 252 75 ; 252 76 ; 252572 ; 8521 ;
Abstract
An electrorheological material containing a carrier fluid and an ionic dye particle component which is an ionically charged compound based on or derived from a conjugated hydrocarbon compound. A preferred ionically charged compound contains at least one aromatic nucleus that has been sulfonated and/or carboxylated to form a negatively charged system which has, in turn, been offset with a positive ion. The electrorheological material is useful for creating aesthetic visual effects and responds quickly to an electric field.