Patents by Inventor Mitchell J. Pulwer

Mitchell J. Pulwer 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 preparation of fluoromethyl-substituted pyridine dicarboxylates
    Patent number: 5106987
    Abstract: Described herein is a process for preparation of substituted pyridine dicarboxylate compounds.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: April 21, 1992
    Assignee: Monsanto Company
    Inventors: William H. Miller, Mitchell J. Pulwer
  • Ammonium salt of methyl 4,4,4-trifluoro-3-oxo-butanethioate
    Patent number: 5105002
    Abstract: Ammonium salt of methyl 4,4,4-trifluoro-3-oxobutanethioate (TMTFAA).
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: April 14, 1992
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Mitchell J. Pulwer, Helen L. Janoski
  • Process for preparation of fluoromethyl-substituted pyridine carbodithioates
    Patent number: 5099024
    Abstract: A process for dehydrofluorination of a 2,6-(bis)trifluoromethyl-dihydropyridine-3,5-dicarbothioic acid ester.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: March 24, 1992
    Assignee: Monsanto Company
    Inventors: Mitchell J. Pulwer, William Miller, Sherrol L. Baysdon
  • Process for preparation of fluoromethyl-substituted pyridine carbodithioates
    Patent number: 5099023
    Abstract: A process for dehydrofluorination of a 2,6-(bis) trifluoromethyl-dihydropyridine-3,5-dicarbothioic acid ester.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: March 24, 1992
    Assignee: Monsanto Company
    Inventors: William Miller, Mitchell J. Pulwer
  • Process for preparation of aromatic thiol esters
    Patent number: 5071992
    Abstract: A process for producing an aromatic thiolester by mixing an alkyl or aryl thiol with an alkali metal hydroxide aqueous solution and, in the presence of a phase transfer catalyst, reacting it with an aromatic acid halide. Diacid halides may be used to produce bisthiol esters.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: December 10, 1991
    Assignee: Monsanto Company
    Inventors: Helen L. Janoski, Mitchell J. Pulwer
  • Process for preparation of fluoromethyl-substituted pyridine dicarboxylates
    Patent number: 5070204
    Abstract: Described herein is a process for preparation of substituted pyridine dicarboxylate compounds.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: December 3, 1991
    Assignee: Monsanto Company
    Inventors: William Miller, Mitchell J. Pulwer
  • Process for preparation of fluoromethyl-substituted piperidine carbodithioates
    Patent number: 5055583
    Abstract: Described herein is a process for dehydrohalogenation of substituted dihydropyridine dicarbothioate compounds.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: October 8, 1991
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Mitchell J. Pulwer
  • Process for preparation of fluoromethyl-substituted piperidine carbodithioates
    Patent number: 5051512
    Abstract: Described herein is a process for preparation of substituted piperidine dicarbothioate compounds.
    Type: Grant
    Filed: March 19, 1990
    Date of Patent: September 24, 1991
    Assignee: Monsanto Company
    Inventors: Sherrol L. Baysdon, Mitchell J. Pulwer, Helen L. Janoski
  • Oxidation/dealkylation process
    Patent number: 4965403
    Abstract: There is disclosed a process for producing the alkali metal salts of N-phosphonomethylglycine which comprises heating to an elevated temperature a di-alkali metal salt of N-alkyl-N-(2-hydroxyethyl)aminomethylphosphonic acid.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: October 23, 1990
    Assignee: Monsanto Company
    Inventors: Donald L. Fields, Jr., William H. Miller, Mitchell J. Pulwer
  • Process for the preparation of N-substituted aminomethylphosphonic acids
    Patent number: 4804499
    Abstract: A process for the preparation of an N-substituted aminomethylphosphonic acid comprising reacting a 2,5-diketopiperazine compound with phosphorous acid and formaldehyde in an acidic medium.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: February 14, 1989
    Assignee: Monsanto Company
    Inventors: William H. Miller, David B. Reitz, Mitchell J. Pulwer
  • Process for the preparation of N-substituted aminomethylphosphonic acids
    Patent number: 4657705
    Abstract: A process for the preparation of an N-substituted aminomethylphosphonic acid comprising reacting a substituted amine, urea or carbamate substrate compound with phosphorous acid and formaldehyde in an acidic medium.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: April 14, 1987
    Assignee: Monsanto Company
    Inventors: William H. Miller, David B. Reitz, Mitchell J. Pulwer
  • Process for the preparation of a glyphosate product
    Patent number: 4654429
    Abstract: A process for the preparation of a glyphosate product. An .alpha.-substituted N-phosphonomethylamino diacetic acid substrate is contacted in an aqueous medium with molecular oxygen in the presence of a catalyst for the oxidative cleavage of a substituent from the imino nitrogen of the substrate. Cleavage produces a glyphosate product, carbon dioxide, a higher aldehyde, or ketone. Novel intermediates and methods of preparation thereof are also disclosed.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: March 31, 1987
    Assignee: Monsanto Company
    Inventors: Terry M. Balthazor, Mitchell J. Pulwer
  • 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
  • .alpha.-Substituted N-phosphonomethyliminodiacetic acid
    Patent number: 4617415
    Abstract: A process for the preparation of a glyphosate product. An .alpha.-substituted N-phosphonomethylamino diacetic acid substrate is contacted in an aqueous medium with molecular oxygen in the presence of a catalyst for the oxidative cleavage of a substituent from the imino nitrogen of the substrate. Cleavage produces a glyphosate product, carbon dioxide, a higher aldehyde, or ketone. Novel intermediates and methods of preparation thereof are also disclosed.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: October 14, 1986
    Assignee: Monsanto Company
    Inventors: Terry M. Balthazor, Mitchell J. Pulwer