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. 16, 1996
Filed:
May. 12, 1995
Applicant:
Inventors:
Stephen Kelly, Mohlin, CH;
Martin Schadt, Seltisberg, CH;
Assignee:
Hoffmann-La Roche Inc., Nutley, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229967 ; 558415 ; 560 61 ; 560 85 ; 570127 ;
Abstract
Compounds containing a 4-[(E)-alk-2-enoyloxy]benzoate group and liquid crystalline mixtures which contain such compounds and the use of such compounds and, respectively, mixtures in electro-optical indicating devices. The compounds are of the formula ##STR1## wherein R.sup.1 is alkyl with 1 to 12 carbon atoms;