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. 02, 1996
Filed:
Jan. 23, 1995
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25229961 ; 549273 ; 549292 ; 546268 ; 544238 ; 544298 ; 544315 ; 544334 ; 544335 ; 544336 ; 544406 ; 544408 ; 544409 ;
Abstract
Optical active compounds which are chemically stable, are not colored, have a good optical stability, and which give a liquid crystal composition having a large spontaneous polarization when the compound is incorporated, are provided. The optical active compound have an asymmetric carbon atom fixed by a .delta.-valerolactone ring and the permanent dipole moment derived from the carboxylic group is fixed by the .delta.-valerolactone ring and two alkyl groups which can be regarded as a part of a measogen.