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:
May. 19, 1992
Filed:
Sep. 25, 1991
Applicant:
Inventors:
Shigeki Ishibashi, Musashino, JP;
Kouzaburou Nakamura, Musashino, JP;
Tohru Maruno, Musashino, JP;
Masaaki Nakahata, Kawagoe, JP;
Takaaki Negishi, Kawagoe, JP;
Fumiyoshi Urano, Kawagoe, JP;
Assignees:
Wako Pure Chemical Industries, Ltd., Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229967 ; 25229901 ; 560 64 ; 560 73 ; 560 76 ; 560 85 ; 568633 ;
Abstract
A liquid crystal compound of the formula: ##STR1## wherein m and n are independently integers of 1 to 22; k and l are independently integers of 1 to 2; and C* is an asymmetric carbon atom, is chemically stable and can be applied to liquid crystal display devices operable at room temperature.