Patents by Inventor Kenneth A. M. Kremer

Kenneth A. M. Kremer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aminophenyl ketone derivatives and a method for the preparation thereof
    Patent number: 6127576
    Abstract: The present invention provides o-aminophenyl ketone derivatives which are intermediates useful in the manufacture of herbicidal sulfamoyl urea compounds, including the crop selective herbicide 1-{[o-(cyclopropylcarbonyl)phenyl]-sulfamoyl}-3-(4,6-dimethoxy-2-pyrimidin yl)urea. Also provided is a method for the preparation of said intermediates.
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: October 3, 2000
    Assignee: American Cyanamid Company
    Inventors: David A. Cortes, Kenneth A. M. Kremer
  • Aryne intermediates and a process for the preparation thereof
    Patent number: 5856576
    Abstract: There are provided aryne intermediates of formula I, useful in the manufacture of herbicidal compounds. ##STR1## Also provided is a method to prepare the formula I intermediates via the palladium catalyzed coupling of an o-halonitrobenzene or o-haloaniline with 3-butyne-1-ol.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: January 5, 1999
    Assignee: American Cyanamid Company
    Inventors: Philip M. Harrington, Kenneth A. M. Kremer
  • Method for the purification of 23-E isomers of 23-imino derivatives of LL-F28249 compounds
    Patent number: 5478951
    Abstract: The present invention provides a method for the purification of a 23-E isomer of a 23-imino derivative of a LL-F28249 compound having the structural formula I ##STR1##
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: December 26, 1995
    Assignee: American Cyanamid Company
    Inventor: Kenneth A. M. Kremer
  • Method for making hydrazide or hydrazine compounds
    Patent number: 5300688
    Abstract: This invention relates to the preparation of hydrazide or hydrazine compounds. More particularly, this invention relates to an efficient method for the preparation of substituted hydrazides, hydrazines, and intermediates therefor, from urea starting products. Such hydrazide and hydrazine compounds are useful as insecticides.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: April 5, 1994
    Assignee: American Cyanamid Company
    Inventor: Kenneth A. M. Kremer
  • 1,1,1-trifluoro-2-propene compounds
    Patent number: 5068390
    Abstract: 1,1,1-trifluoro-2-propene compounds which are useful in the preparation of insecticidal, acaricidal and nematicidal arylpyrrole compounds are described. A method for the preparation of 1,1,1-trifluoro-2-propene compounds is presented.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: November 26, 1991
    Assignee: American Cyanamid Company
    Inventors: David G. Kuhn, Kenneth A. M. Kremer