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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.:

US 4909957 B1

PDFFull Text
Date of Patent:
Mar. 20, 1990

Filed:

Sep. 07, 1988

Liquid crystalline compounds and process for production thereof

Applicant:
Inventors:

Kazuhiko Sakaguchi, Toyonaka, JP;

Naoya Kasai, Amagasaki, JP;

Yoshikazu Takehira, Itami, JP;

Tohru Kitamura, Kyoto, JP;

Yutaka Shiomi, Amagasaki, JP;

Assignee:

Daiso Co., Ltd., Osaka, JP;

Attorney:

Wegner & Bretschneider

Primary Examiner:

John F Terapane

Assistant Examiner:

J E Thomas

Int. Cl.
CPC ...
C09K / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
25229961 ; 25229901 ; 544298 ; 544335 ; 549322 ; 549323 ; 549508 ; 549560 ;
Abstract

Liquid crystalline compounds having an optically active .gamma.-lactone ring of the formula: ##STR1## wherein R.sup.1 is a group selected from the group consisting of ##STR2## n and e are each independently 0 or 1; R.sup.3 is an alkyl group having 1 to 15 carbon atoms; R.sup.2 is a group of the formula: --(CO).sub.m --R.sup.4 ; m is 0 or 1; R.sup.4 is hydrogen atom or an alkyl having 1 to 15 carbon atoms; and the symbol * is an asymmetric carbon atom, and an intermediate thereof, and process for the production of the same.

Find Patent Forward Citations

Sakaguchi, Kazuhiko. (1990). Liquid crystalline compounds and process for production thereof (U.S. Patent No. 4909957). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4909957

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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