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:
Jun. 06, 1978
Filed:
Feb. 05, 1975
Applicant:
Inventors:
Christopher Frederick Carter, Wooton, EN;
Roy Trevor Blunt, Towcester, EN;
James Cyril Lewis, Northampton, EN;
Geoffrey Michael Garner, Northampton, EN;
Assignee:
Plessey Handel und Investments AG, Zug, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; B03C / ;
U.S. Cl.
CPC ...
350355 ; 2042 / ; 96 / ;
Abstract
The invention provides a working fluid for an electrophoretic image display device including a dispersion of a species of finely divided particles of an opaque dielectric material suspended in a suspension medium, each of the said particles which are transportable within the suspension medium under the influence of an electric field, has a chemical compound adsorbed on the surface thereof, the chemical compound is such that the molecules thereof exert an attractive force towards each other in the absence of the electric field.