Patents by Inventor Heinz Peter Schwemlein

Heinz Peter Schwemlein 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).

  • Method for making acylamides by synthesizing and acylating benzoxazines
    Patent number: 7161001
    Abstract: A method is provided for synthesizing acylamides, useful as protectant for cultivated plants. A benzoxazine, such as 3,4-dihydro-3-methyl-2H-1,4-benzoxazine, is made in a stepwise manner by initially forming an o-nitrophenoxyketone by reacting a haloketone and a nitrophenol. The o-nitrophenoxyketone is hydrogenated to form the corresponding benzoxazine, which is thereafter acylated with an acylhalide to produce the acylamide, such as 4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: January 9, 2007
    Assignee: Syngenta Crop Protection, Inc.
    Inventors: Catherine Munson, legal representative, Michael Allen Oliver, Heinz Peter Schwemlein, Robert Eugene Munson, deceased
  • Method for making acylamides by synthesizing and acylating benzoxazines
    Patent number: 6977299
    Abstract: A method is provided for synthesizing acylamides, useful as protectant for cultivated plants. A benzoxazine, such as 3,4-dihydro-3-methyl-2H-1,4-benzoxazine, is made in a stepwise manner by initially forming an o-nitrophenoxyketone by reacting a haloketone and a nitrophenol. The o-nitrophenoxyketone is hydrogenated to form the corresponding benzoxazine, which is thereafter acylated with an acylhalide to produce the acylamide, such as 4-dichloroacetyl-3,4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: December 20, 2005
    Assignee: Syngenta Crop Protection, Inc.
    Inventors: Catherine Munson, legal representative, Michael Allen Oliver, Heinz Peter Schwemlein, Robert Eugene Munson, deceased
  • Method for making acylamides by synthesizing and acylating benzoxazines
    Publication number: 20040044206
    Abstract: A method is provided for synthesizing acylamides, useful as protectant for cultivated plants. A benzoxazine, such as 3,4-dihydro-3-methyl-2H-1,4-benzoxazine, is made in a stepwise manner by initially forming an o-nitrophenoxyketone by reacting a haloketone and a nitrophenol. The o-nitrophenoxyketone is hydrogenated to form the corresponding benzoxazine, which is thereafter acylated with an acylhalide to produce the acylamide, such as 4-dichloroacetyl-3,4-dichloroacetyl-3,4-dihydro-3-methyl-2H-1,4-benzoxazine.
    Type: Application
    Filed: May 6, 2003
    Publication date: March 4, 2004
    Inventors: Robert Eugene Munson, Catherine Munson, Michael Allen Oliver, Heinz Peter Schwemlein
  • Process for making 2-amino-4, 6-dialkoxy-1, 3, 5-triazines
    Patent number: 5721364
    Abstract: A method is provided for making ammelide ethers, such as a 2-amino-4,6-dialkoxy-1,3,5-triazine. A 2-amino-4,6-dihalo-1,3,5-triazine (ADXT) is synthesized in the presence of an aromatic organic solvent, and reaction is effected directly between the (ADXT) synthesis mixture and an alkali metal C.sub.(1-4) alkoxide and C.sub.(1-4) alkanol, including contact through a static mixer. These ammelide ethers are useful as intermediates for making N-phenylsulfonyl-N-triazinylureas, which have herbicidal and growth regulating properties.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: February 24, 1998
    Assignee: Novartis Corporation
    Inventors: Dean Kent Hoglen, Heinz Peter Schwemlein, Herng-Tay Wu