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:
Aug. 17, 1976
Filed:
Jan. 02, 1975
Applicant:
Inventor:
Frederick Davis, Dublin, CA (US);
Assignee:
RPR, Inc., Dublin, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C07C / ; C09B / ;
U.S. Cl.
CPC ...
252299 ; 2323 / ; 73356 ; 252408 ; 3501 / ; 428-1 ;
Abstract
High temperature non-crystallizing cholesteric liquid crystal compositions are provided having at least about 50 weight percent of cholesteryl 3-chloropropionate, at least about 30 weight percent of a cholesteryl ester, wherein the acyl group has a substituted or unsubstituted benzene ring, and not more than 20 weight percent of other cholesteryl compounds. The compositions are found to provide billiant colors and do not crystallize when stored for long periods of time at room temperature or below.