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:
Nov. 15, 1977
Filed:
Sep. 10, 1973
Rudolf Thomas, Cologne, DT;
Wolfgang Kramer, Cologne, DT;
Ludwig Eue, Cologne, DT;
Carl Metzger, Wuppertal, DT;
Gerhard Jager, Wuppertal, DT;
Bayer Aktiengesellschaft, Leverkusen, DT;
Abstract
New N,N'-tetrasubstituted ureas of the formula ##STR1## in which X is oxygen, sulfur or an NR.sup.5 -- or SO.sub.2 --group, R is alkyl or an optionally substituted aryl group, or an optionally substituted aralkyl group, R.sup.1 and R.sup.4 are individually optionally substituted hydrocarbyl which may contain oxygen or sulfur, R.sup.2 is optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkoxy or cycloalkyl, R.sup.3 is alkyl, which may optionally be substituted by halogen, or is alkenyl, or R.sup.2 and R.sup.3 conjointly form an alkylene bridge, which can be interrupted by a hetero-atom, such as O, or N-alkyl group and which forms a heterocyclic ring with the adjoining nitrogen atom, R.sup.1 and R.sup.5, independently of one another, are each alkyl or conjointly form an alkylene bridge, which can be interrupted by a hetero-atom, such as O, and which forms a heterocyclic ring with the adjoining nitrogen atom; and Y is oxygen or sulfur; are remarkably effective and selective herbicides.