Patents by Inventor Donald R. Maulding

Donald R. Maulding 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).

  • Novel method for the preparation of quinoline-2,3-dicarboxylic
    Patent number: 5001254
    Abstract: The present invention relates to novel methods for the preparation of quinoline-2,3-dicarboxylic acid, useful for the preparation of the highly effective 2-(2-imidazolin-2-yl)quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: March 19, 1991
    Inventor: Donald R. Maulding
  • Process for the preparation of 23-(C1-C6 alkyloxime)-LL-F28249 compounds
    Patent number: 4988824
    Abstract: There is provided a process for the preparation of 23-(C.sub.1 -C.sub.6 alkyloxime)-LL-F28249 compounds via the oxidation of crystalline 5-O-p-nitrobenzoyl-LL-F28249 compounds.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: January 29, 1991
    Inventors: Donald R. Maulding, Anil Kumar
  • Method for the preparation of anilinofumarate [quinoline-2,3- dicarboxylic]
    Patent number: 4847405
    Abstract: The present invention relates to novel methods for the preparation of anilinofumarate [quinoline- 2,3-dicarboxylic acid], a useful intermediate in the preparation of 2-(2-imidazolin-2-yl)-quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: July 11, 1989
    Assignee: American Cyanamid Company
    Inventor: Donald R. Maulding
  • Method for the preparation of anilinofumarate
    Patent number: 4814486
    Abstract: The present invention relates to an improved method for the preparation of anilinofumarates useful as intermediates in the preparation of 2-(2-imidazolin-2-yl) quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: October 1, 1987
    Date of Patent: March 21, 1989
    Assignee: American Cyanamid Company
    Inventors: Donald R. Maulding, Albert A. Cevasco
  • Method for the preparation of quinoline-2,3-dicarboxylic acid
    Patent number: 4766218
    Abstract: The present invention relates to novel methods for the preparation of quinoline-2,3-dicarboxylic acid, useful for the preparation of the highly effective 2-(2-imidazolin-2-yl)quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: August 23, 1988
    Assignee: American Cyanamid Company
    Inventor: Donald R. Maulding
  • Method for the preparation of quinoline-2,3-dicarboxylic acid
    Patent number: 4757146
    Abstract: The present invention relates to novel methods for the preparation of quinoline-2,3-dicarboxylic acid, useful for the preparation of the highly effective 2-(2-imidazolin-2-yl)quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: July 12, 1988
    Assignee: American Cyanamid Company
    Inventor: Donald R. Maulding
  • Method for the preparation of anilinofumarate
    Patent number: 4675432
    Abstract: The present invention relates to methods for the preparation of anilinofumarate, a useful intermediate in the preparation of quinoline-2,3-dicarboxylic acid and in the preparation of 2-(2-imidazolin-z-yl) quinoline-3-carboxylic acid herbicidal agents.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: June 23, 1987
    Assignee: American Cyanamid Company
    Inventor: Donald R. Maulding
  • Hetero nitrogen containing compounds and polymerms light stabilized with said compounds
    Patent number: 4555537
    Abstract: Compounds of the formula: ##STR1## are disclosed as light stabilizers for polymers normally subject to degradation by light.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: November 26, 1985
    Assignee: American Cyanamid Company
    Inventors: Richard Spector, Donald R. Maulding
  • Procedure for preparing 1,3-diphenyl-1,3-propanedione
    Patent number: 4482745
    Abstract: The present invention provides a novel method for the preparation of 1,3-diphenyl-1,3-propanedione.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: November 13, 1984
    Assignee: American Cyanamid Company
    Inventor: Donald R. Maulding
  • 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.
  • Preparation of 3-chloromethyl-4-alkyl-nitrobenzene by chloromethylation
    Patent number: 4395577
    Abstract: A method for the preparation of 3-chloromethyl derivatives of 4-alkylnitrobenzenes from the corresponding amidomethyl derivatives with phosphorus oxychloride or with phosphorous oxychloride and inert solvents. This process also relates to 3-chloromethyl-4-alkylnitrobenzenes which are useful intermediates for the preparation of certain substituted 2,6-dinitroaniline pre-emergence herbicides.
    Type: Grant
    Filed: October 22, 1981
    Date of Patent: July 26, 1983
    Assignee: American Cyanamid Company
    Inventor: Donald R. Maulding
  • Vulcanization system for vulcanizable thiodiethanol elastomers
    Patent number: 4218559
    Abstract: The present invention relates in general to vulcanizable elastomers of thiodiethanol and, in particular, to the provision of a novel vulcanization system for vulcanizable elastomers of thiodiethanol, comprising sulfur and certain pyrazine compounds.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: August 19, 1980
    Assignee: American Cyanamid Company
    Inventors: Donald R. Maulding, Rudolf A. Behrens