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:
Oct. 29, 1991
Filed:
Apr. 27, 1990
Sadao Takehara, Chiba, JP;
Takeshi Kuriyama, Chiba, JP;
Kayoko Nakamura, Chiba, JP;
Tadao Shoji, Chiba, JP;
Toru Fujisawa, Saitama, JP;
Masashi Osawa, Chiba, JP;
Tamejiro Hiyama, Kanagawa, JP;
Tetsuo Kusumoto, Kanagawa, JP;
Akiko Nakayama, Tokyo, JP;
Kiyoharu Nishide, Shiga, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Kawamura Institute of Chemical Research, Sakura, JP;
Sagami Chemical Research Center, Tokyo, JP;
Abstract
An optically active lactone derivative represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a straight-chain or branched alkyl, alkoxyl, alkanoyloxy, alkoxycarbonyl, alkoxyalkyl, alkoxyalkanoyloxy, or alkoxyalkoxyl group having 1 to 20 carbon atoms or an optically active group of each of the above kinds, R.sup.2 represents a straight-chain or branched alkyl group having 1 to 20 carbon atoms, ##STR2## or trans-1,4-cyclohexylene group of the formula and the asymmetric carbon atoms at the 2- and 4-positions in the lactone ring each independently is of the (S) or (R) configuration, an intermediate therefor, a process for producing the intermediate, a liquid-crystal composition, and a liquid-crystal display device.