Patents by Inventor Robert F. Doehner, Jr.

Robert F. Doehner, Jr. 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).

  • Alkyl esters of substituted 2-methyl-3-quinolinecarboxylic acid and quinoline-2,3-dicarboxylic acid: dialkyl 3-(substituted)phenylaminobut-2-ene-dioates and methods for the preparation thereof
    Patent number: 4910327
    Abstract: There are provided novel alkyl esters of substituted 2-methyl-3-quinolinecarboxylic acid and quinoline-2,3-dicarboxylic acid; novel dialkyl 3-(substituted)phenylaminobut-2-ene-dioates, useful as intermediates for the preparation of highly effective 2-(2-imidazolin-2-yl)quinoline herbicidal agents and methods for the preparation thereof.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: March 20, 1990
    Assignee: American Cyanamid Company
    Inventor: Robert F. Doehner, Jr.
  • Benzenesulfonyl carboxamide compounds useful as herbicidal agents
    Patent number: 4883914
    Abstract: There are provided novel benzenesulfonyl carboxamide compounds and novel intermediate benzenesulfonyl-2-imidazolin-5-one compounds, novel intermediates and methods for the preparation of said compounds, and a method for controlling a variety of annual and perennial plant species utilizing novel benzenesulfonyl carboxamide compounds and novel intermediate benzenesulfonyl 2-imidazolin-5-one compounds.
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: November 28, 1989
    Assignee: American Cyanamid Company
    Inventors: Sergio I. Alvarado, Alvin D. Crews, Jr., Peter J. Wepplo, Robert F. Doehner, Jr., Thomas E. Brady, David M. Gange, Desiree L. Little
  • Herbicidal o-(substituted, aminomethylbenzoic, nicotinic and quinoline-3-carboxylic acids, esters, and salts
    Patent number: 4861887
    Abstract: A method for the preparation of o-carboxyl imidazolinone compounds including oxidizing the appropriate 2-{[(1-carbamoyl-1,2-dimethylpropyl)amino]methyl}-benzoic acid intermediate with a brominating agent. Compounds useful as intermediates in the oxidation method and methods for preparing them are disclosed.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: August 29, 1989
    Assignee: American Cyanamid Company
    Inventor: Robert F. Doehner, Jr.
  • Alkyl esters of substituted 2-methyl-3-quinolinecarboxylic acid and quinoline-2,3-dicarboxylic acid
    Patent number: 4843162
    Abstract: There are provided novel alkyl esters of substituted 2-methyl-3-quinolinecarboxylic acid and quinoline-2,3-dicarboxylic acid; novel dialkyl 3-(substituted)phenylamino-2-ene-dioates, useful as intermediates for the preparation of highly effective 2-(2-imidazolin-2-yl)quinoline herbicidal agents and methods for the preparation thereof.
    Type: Grant
    Filed: February 21, 1987
    Date of Patent: June 27, 1989
    Assignee: American Cyanamid Company
    Inventor: Robert F. Doehner, Jr.
  • Preparation of substituted and disubstituted-pyridine-2,3-dicarboxylate esters
    Patent number: 4723011
    Abstract: Pyridine-2,3-dicarboxylates of Formula I ##STR1## are prepared by reacting an alpha halo-beta keto ester of formula II ##STR2## with an alpha, beta-unsaturated aldehyde or ketone of formula III ##STR3## in the presence of a minimum of 2 molar equivalents of ammonium salt.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: February 2, 1988
    Assignee: American Cyanamid Company
    Inventor: Robert F. Doehner, Jr.
  • Alkyl esters of substituted 2-methyl-3-quinolinecarboxylic acid and quinoline-2,3-dicarboxylic acid
    Patent number: 4656283
    Abstract: There are provided novel alkyl esters of substituted 2-methyl-3-quinolinecarboxylic acid and quinoline-2,3-dicarboxylic acid; novel dialkyl 3-(substituted)phenylaminobut-2-ene-dioates, useful as intermediates for the preparation of highly effective 2-(2-imidazolin-2-yl)quinoline herbicidal agents and methods for the preparation thereof.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: April 7, 1987
    Assignee: American Cyanamid Company
    Inventor: Robert F. Doehner, Jr.
  • Process for the preparation of 2-(5-isopropyl-5-methyl-4-oxo-2-imidazolin-2-yl)-3-quinoline-carboxylic acid and alkyl 2-trichloromethyl-3-quinoline-carboxylate intermediates therefor
    Patent number: 4459408
    Abstract: The invention is related to a novel process for the prepartion of 2-(5-isopropyl-5-methyl-4-oxo-2-imidazolin-2-yl)-3-quinolinecarboxylic acid, a useful and valuable herbicide.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: July 10, 1984
    Assignee: American Cyanamid Company
    Inventors: Donald R. Maulding, Robert F. Doehner, Jr.