Patents by Inventor Van R. Gaertner

Van R. Gaertner 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).

  • Process for preparing N-phosphonomethylglycine and derivatives
    Patent number: 4650613
    Abstract: There is disclosed a process for the preparation of N-phosphonomethylglycine by dealkylation of N-alkyl-N-phosphonomethylglycine. The N-alkyl moiety contains an electron withdrawing group in the 2-position. Certain novel N-alkyl-N-phosphonomethylglycines are disclosed.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: March 17, 1987
    Assignee: Monsanto Company
    Inventors: Mitchell J. Pulwer, Van R. Gaertner
  • Herbicidal .alpha.-hydroxy phosphonates
    Patent number: 4475943
    Abstract: This invention relates to .alpha.-hydroxy phosphonates which are useful as herbicides. More particularly, this invention relates to .alpha.-hydroxy phosphonates a process for preparing the same, herbicidal use thereof, and to herbicidal methods and compositions employing the same.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: October 9, 1984
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • .alpha.-Hydroxy phosphonates
    Patent number: 4413125
    Abstract: This invention relates to .alpha.-hydroxy phosphonates which are useful as herbicides. More particularly, this invention relates to .alpha.-hydroxy phosphonates a process for preparing the same, herbicidal use thereof, and to herbicidal methods and compositions employing the same.
    Type: Grant
    Filed: July 1, 1981
    Date of Patent: November 1, 1983
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • N-Substituted carboxy-N-phosphonomethylglycines and the salts thereof as herbicides
    Patent number: 4312662
    Abstract: This disclosure relates to novel N-substituted carboxy-N-phosphonomethylglycines and the salts thereof which are useful as herbicides. This disclosure further relates to herbicidal compositions containing such N-substituted carboxy-N-phosphonomethylglycines and the salts thereof and to herbicidal methods employing such compounds and compositions.
    Type: Grant
    Filed: December 31, 1979
    Date of Patent: January 26, 1982
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • Herbicidal methods employing derivatives of N-phosphonomethylglycine
    Patent number: 4251257
    Abstract: A new class of compounds, prepared by reacting a salt of N-phosphonomethylglycine with a cyclic anhydride, have utility as post-emergent herbicides.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: February 17, 1981
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • Herbicidal N-substituted ethylene derivatives of N-phosphonomethylglycine
    Patent number: 4251256
    Abstract: Certain N-substituted ethylene derivatives of N-phosphonomethylglycine are novel compounds and display useful post-emergent herbicidal activity.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: February 17, 1981
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • N-Phosphonomethylglycinonitrile and certain derivatives thereof
    Patent number: 4221583
    Abstract: N-phosphonomethylglycinonitrile and certain derivatives thereof are novel compounds which can be used as herbicides themselves and/or can be converted to known herbicides. Such novel compounds, and others, can be prepared by a novel process.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: September 9, 1980
    Assignee: Monsanto Company
    Inventors: Van R. Gaertner, Wendell G. Phillips
  • N-Phosphonomethyliminodiacetonitrile and certain derivatives thereof
    Patent number: 4211547
    Abstract: N-phosphonomethyliminodiacetonitrile and certain derivatives thereof are novel compounds which can be used as herbicides themselves and/or can be converted to known herbicides.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: July 8, 1980
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • Method for increasing the sucrose content of growing plants
    Patent number: 4203756
    Abstract: The sucrose content of sugarcane plants is increased by treating said plants, prior to harvest, with N-substituted ethylene derivatives of N-phosphonomethylglycine, and certain esters and salts thereof.
    Type: Grant
    Filed: December 22, 1978
    Date of Patent: May 20, 1980
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • Derivatives of N-phosphonomethylglycine
    Patent number: 4197254
    Abstract: A new class of compounds, prepared by reacting a salt of N-phosphonomethylglycine with a cyclic anhydride, have utility as post-emergent herbicides.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: April 8, 1980
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • N-(2-hydroxyalkyl) derivatives of N-phosphonomethylglycine and herbicidal compositions containing same
    Patent number: 4119430
    Abstract: Certain N-(2-hydroxyalkyl) derivatives of N-phosphonomethylglycine have been found to be useful as herbicides for the treatment of undesired plants.
    Type: Grant
    Filed: May 18, 1977
    Date of Patent: October 10, 1978
    Assignee: Monsanto Company
    Inventors: Van R. Gaertner, Philip C. Hamm
  • Cyclized derivatives of N-(2-hydroxyalkyl)-N-phosphonomethylglycine compounds
    Patent number: 4105432
    Abstract: Lactones prepared by cyclizing certain N-(2-hydroxyalkyl)-N-phosphonomethylglycine compounds are useful as post-emergent herbicides for the treatment of undesired plants.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: August 8, 1978
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • N-(2-hydroxyalkyl) derivatives of N-phosphonomethylglycine for treatment of sugarcane
    Patent number: 4063922
    Abstract: Certain N-(2-hydroxyalkyl) derivatives of N-phosphonomethylglycine have been found to be useful in the treatment of sugarcane plants to increase their sucrose content.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: December 20, 1977
    Assignee: Monsanto Company
    Inventors: Van R. Gaertner, Philip C. Hamm
  • N-(2-hydroxyalkyl) derivatives of N-phosphonomethylglycine and the herbicidal use thereof
    Patent number: 4047927
    Abstract: Certain N-(2-hydroxyalkyl) derivatives of N-phosphonomethylglycine have been found to be useful as herbicides for the treatment of undesired plants.
    Type: Grant
    Filed: August 13, 1976
    Date of Patent: September 13, 1977
    Assignee: Monsanto Company
    Inventors: Van R. Gaertner, Philip C. Hamm
  • Herbicidal N-thiolcarbonyl derivatives of N-phosphonomethylglycine
    Patent number: 4035177
    Abstract: Certain N-thiolcarbonyl derivatives of N-phosphonomethylglycine are novel chemical compounds having desirable herbicidal activity.
    Type: Grant
    Filed: July 16, 1976
    Date of Patent: July 12, 1977
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner
  • N-thiolcarbonyl derivatives of N-phosphonomethylglycine
    Patent number: 3991095
    Abstract: Certain N-thiolcarbonyl derivatives of N-phosphonomethylglycine are novel chemical compounds having desirable herbicidal activity.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: November 9, 1976
    Assignee: Monsanto Company
    Inventor: Van R. Gaertner