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:
Jun. 14, 2005
Filed:
Dec. 20, 2000
Zoubair Mohammed Cherkaoui, Allschwil, CH;
Klaus Schmitt, Lörrach, DE;
Zoubair Mohammed Cherkaoui, Allschwil, CH;
Klaus Schmitt, Lörrach, DE;
Rolic AG, Zug, CH;
Abstract
A compound is of formula (I), in which: Ato A, Eand Eeach independently represent hydrogen or an optionally-substituted hydrocarbon group; Band Beach independently represent a single bond, an oxygen atom or an optionally-substituted hydrocarbon group; MGand MGeach independently represent an optionally-substituted ring system; CG is a divalent or polyvalent chiral group. The optically active compound may be used as a doping agent for liquid crystals for a wide range of applications including solid state cholesteric filters for projection displays, circular polarisers, optical filters, etc.