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:
Jul. 18, 1995
Filed:
May. 28, 1992
Tadaaki Isozaki, Tokyo, JP;
Hiroyuki Mogamiya, Tokyo, JP;
Shigenori Sakuma, Tokyo, JP;
Noriko Yamakawa, Tokyo, JP;
Showa Shell Sekiyu Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention discloses optically active liquid crystal compounds represented by the formulas [I], [II] and [III]: ##STR1## wherein R.sub.1 and R.sub.2 each represents an alkyl group of 4-18 carbon atoms, X represents O, COO or a single bond, and (A), (B), (C), (D) and (E) each represents ##STR2## in which l represents a halogen. The invention further discloses optically active liquid crystal compounds which are able to exhibit tristable states, represented by the formulas [IV], [V] and [VI]: ##STR3## wherein R.sub.1 ' and R.sub.2 ' each represents a straight chain alkyl group of 5-16 carbon atoms, X' represents O or COO and (A), (B), (C), (D) and (E), and l each has the same meaning as above.