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:
Mar. 14, 1989
Filed:
Apr. 08, 1987
Joachim Krause, Dieburg, DE;
Michael Romer, Rodgau, DE;
Ludwig Pohl, Darmstadt, DE;
Bernhard Scheuble, Yokohama, JP;
Georg Weber, Erzhausen, DE;
Merck Patent Gesellschaft Mit Beschrankter Haftung, Darmstadt, DE;
Abstract
Liquid crystalline fluorine-containing pyrimidine compounds have the formula I ##STR1## wherein R.sup.1 and R.sup.2 are H, R, OR or OCOR, and one of them can also be CN or F, or, if A is a covalent bond, also one or both of R.sup.1 and R.sup.2 can be 4-R.sup.4 -phenyl or 4-R-cyclohexyl, wherein R.sup.4 is R, OR, cyano, f or OCOR; wherein R is an alkyl group of 1 to 12 C atoms; R.sup.3 is F or, if one of the radicals R.sup.1 or R.sup.2 is F or 4-fluorophenyl, also H; Z is 1,3-pyrimidin-2,5-diyl; and A is 1,4-phenylene, 1,4-cyclohexylene or a covalent bond. Fluorine-containing pyrimidine compounds are useful components of liquid crystal dielectrics for electro-optical display devices.