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:
Mar. 19, 2019
Filed:
Aug. 06, 2018
Applicant:
E Ink Corporation, Billerica, MA (US);
Inventors:
Hui Du, Milpitas, CA (US);
Joshua A Ritchey, Melrose, MA (US);
Olga Vladimirovna Barykina-Tassa, Boston, MA (US);
Vladimir Sofiyev, Oakland, CA (US);
Assignee:
E INK CALIFORNIA, LLC, Fremont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/167 (2006.01); C08F 10/10 (2006.01); C08F 8/44 (2006.01); C09D 5/44 (2006.01); G02F 1/1675 (2019.01);
U.S. Cl.
CPC ...
C09D 5/4407 (2013.01); C08F 8/44 (2013.01); C09D 5/448 (2013.01); G02F 1/167 (2013.01); G02F 2001/1678 (2013.01);
Abstract
An electrophoretic medium including a mixture of charge control agents, for example quaternary amine salts of polyisobutylene combined with quaternary amine salts of unsaturated monomers. The described electrophoretic medium exhibits improved color saturation as compared to similar electrophoretic media having only one of the charge control agents.