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:
Aug. 20, 2013
Filed:
Dec. 14, 2009
Applicants:
Kyung-hee Choi, Hwaseong, KR;
Sun-hee Lee, Hwaseong, KR;
Jin-wook Choi, Hwaseong, KR;
Inventors:
Assignee:
Dongjin Semichem Co., Ltd., Incheon, KR;
Primary Examiner:
Int. Cl.
CPC ...
C09K 19/30 (2006.01); C07C 13/18 (2006.01); C07C 13/19 (2006.01); C07C 13/28 (2006.01); C07C 1/20 (2006.01); C07C 1/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a liquid crystal compound for liquid crystal display. More particularly, the present invention provides a vinylcyclohexylbenzene, its derivatives and the preparation method thereof where the present invention produces only trans-isomer by using Heck coupling reaction instead of Wittig reaction in the introduction to ethenyl group in the central backbone in the preparation process of intermediate. The liquid crystal compound can make the liquid crystal composition have a wide mesophase range and low viscosity.