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. 08, 1990
Filed:
Nov. 30, 1987
Applicant:
Inventors:
George W Gray, North Humberside, GB;
David Lacey, North Humberside, GB;
Kenneth J Toyne, North Humberside, GB;
David Coates, Hertfordshire, GB;
Adam Jackson, North Humberside, GB;
Richard M Scrowston, North Humberside, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
25229965 ; 25229901 ; 25229964 ; 25229966 ; 25229963 ; 25229961 ; 25229962 ; 560 59 ; 560 66 ; 560102 ;
Abstract
A compound suitable for use in a ferroelectric smectic liquid crystal composition having a structure which contains two chiral centers derived from alpha hydroxy carboxylic acid groups and having the formula: ##STR1## wherein R.sub.1 is n-alkoxy containing 1-12 carbo atoms and R.sub.2 is n-alkyl containing 1-12 carbon atoms. Methods of preparation and details of liquid crystal mixtures containing these compounds are described.