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:
Oct. 18, 2011
Filed:
Jun. 27, 2007
Margherita Fontana, Basel, CH;
Gerardus DE Keyzer, Riehen, CH;
Philippe Bugnon, Le Mouret, CH;
Marcel Hahn, Magden, CH;
Kishor Kumar Mistry, Bradford, GB;
Clemens Auschra, Freiburg, DE;
Margherita Fontana, Basel, CH;
Gerardus De Keyzer, Riehen, CH;
Philippe Bugnon, Le Mouret, CH;
Marcel Hahn, Magden, CH;
Kishor Kumar Mistry, Bradford, GB;
Clemens Auschra, Freiburg, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The invention relates to an electrophoretic display, comprising electrodes and cells containing at least one kind of ionic, monochrome particles, a non-polar liquid and a dispersant, wherein the ionic, monochrome particles of at least one kind are essentially aggregates consisting of a carbon containing pigment and an anionic pigment or anionic pigment derivative, and the dispersant is selected from the group consisting of polyacrylates, polyesters, polyurethanes and copolymers. In general, the whole quantity of the pigment and the main part, preferably at least 80%, most preferred from 95% to 100%, of the whole anionic pigment or anionic pigment derivative present within the cells is comprised in the aggregates, with essentially no pigment and only a minor part of the anionic pigment or anionic pigment derivative physically distinct from the aggregates.