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:
Jan. 23, 1996
Filed:
Sep. 22, 1993
George W Gray, Hull, GB;
David Lacey, Hull, GB;
Kenneth J Toyne, Hull, GB;
Richard M Scrowston, Hull, GB;
Ibrahim G Shenouda, Hull, GB;
Lawrence K Chan, Northolt, GB;
Madeline J Bradshaw, Nr Newent, GB;
Victoria Brimmell, Earls Croome, GB;
Jennifer Constant, Powick, GB;
Edward P Raynes, Malvern, GB;
Adam Jackson, Trondheim, NO;
Amarjit K Samra, Wares, GB;
Abstract
Optically active compounds of formula (I), where X has a structure (II) and B is C.sub.1-12 alkyl, a chiral group or a group having a general structure (III), where R and R' are H, C.sub.1-12 alkyl, alkoxy, alkylcarbonyloxy, or alkoxycarbonyl, each ring (IV) and (V) is the same or different, A and D are single bonds or bridging groups, each a and d is 0 or 1; Z, Z' are CN, Cl, F, Br or CF.sub.3 ; provided when Z is CN or Cl, then when B is alkyl X-Y is not (VI) or (VII). Ferroelectric smectic liquid crystal mixtures containing these compounds are also described. ##STR1##