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:
Jul. 21, 1998
Filed:
Feb. 21, 1997
Jing Hong Chen, Bethlehem, PA (US);
Frederic E Schubert, Shoreham, NY (US);
Wei-Hsin Hou, Setauket, NY (US);
Copytele, Inc., Huntington Station, NY (US);
Abstract
Properly-coated pigment particles for use in an electrophoretic display include pigment particles having a pre-determined density and application of a polymeric coating to the pigment particles, wherein the coating comprises a near fluoropolymer, and wherein the density of the fluoropolymer is substantially the same as the density of the pigment particles. When a polymeric coating is applied having a density that is substantially the same as the density of the pigment particles, even though the particles comprise a distribution of particle sizes, the density of the pigment particles is not significantly altered. In a preferred embodiment, the pigment particle comprises a diarylide yellow pigment, having a density of 1.43 g/ml, coated with a polymer made from the monomer 2,3,4,5,6-Pentafluorostyrene, having a density of 1.41 g/ml.