Patents Represented by Law Firm Sprung Horn Kramer et al.
  • Processes and agents for combating fleas
    Patent number: 5266324
    Abstract: The present invention relates to processes and agents for combating fleas on, and in the surroundings of, domestic animals, which is characterised in that the domestic animals are treated with collars which contain active compounds which inhibit insect development.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: November 30, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wilhelm Stendel, Reiner Pospischil, Herbert Voege
  • Herbicidal (7-(hetero) aryloxynaphthalen-2-yl-oxy)-alkane-carboxylic
    Patent number: 5041609
    Abstract: Herbicidal compounds of the formula ##STR1## in which R.sup.1 stands for halogen, cyano or trifluoromethyl,R.sup.2 stands for hydrogen or halogen,R.sup.3 stands for halogen, trifluoromethyl, trifluoromethoxy, trifluoromethylthio or trifluoromethylsulphonyl,R.sup.4 stands for hydrogen or halogen,X stands for nitrogen or for the grouping C-R.sup.5,whereR.sup.5 stands for hydrogen or halogen,with the proviso that at least one of the substituents R.sup.2 or R.sup.4 is different from hydrogen if R.sup.1 stands for chlorine or cyano and simultaneously R.sup.3 stands for trifluoromethyl and X stands for CH, and that R.sup.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: August 20, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Haug, Roland Andree, Hans-Joachim Santel, Robert R. Schmidt, Harry Strang
  • Pesticidal cyclopropanoylamino acid amide derivatives
    Patent number: 5034408
    Abstract: Fungicidal cyclopropanoylamino acid amide derivative of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are identical or different and represent hydrogen or alkyl;Q represents an unsubstituted or substituted straight-chain or branched alkylene chain, or together with the radical R.sup.4 and the nitrogen atom forms a pyrrolidine ring;A represents a straight-chain or branched alkylene chain;n represents the number 0 or 1 andAr represents unsubstituted or substituted aryl.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: July 23, 1991
    Assignee: Bayer Aktiengesellschaft
    Inventors: Detlef Wollweber, Gerd Hanssler
  • Process for the preparation of 2-chloro-5-methylpyridine
    Patent number: 4897488
    Abstract: In the preparation of 2-chloro-5-methylpyridine of the formula ##STR1## by reacting 3-methylpyridine 1-oxide with phosphorus oxychloride, the improvement which comprises carrying out the reaction in the presence of a basic organic nitrogen compound and in the presence of a diluent at a temperature between about -50.degree. C. and +50.degree. C.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: January 30, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Gallenkamp, Hans-Joachim Knops
  • Pure enantiomers of 4,5-disubstituted gamma-butyrolactams, and their use as antiamnestic agents
    Patent number: 4847287
    Abstract: The invention provides pure enatiomers of 4,5-disubstituted .gamma.-butyrolactams of the general formula ##STR1## By means of the pure enantiomers of 4,5-disubstituted .gamma.-butyrolactams (I), according to the invention, it is now possible to synthesize (+)-(3R), (4S), (5S), (7R)-3-hydroxy-5-.alpha.-hydroxybenzyl-1-methyl-4-phenyl-pyrrolidin-2-one and derivatives in the form of pure enantiomers.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: July 11, 1989
    Assignees: Bayer AG, Chinese Academy of Medical Sciences
    Inventor: Wolfgang Hartwig