Patents by Inventor David W. Ladner

David W. Ladner 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 the preparation of 2,3-quinolinedicarboxylic acids
    Patent number: 4459409
    Abstract: There is provided a novel process for the preparation of a substituted or unsubstituted 2,3-quinolinedicarboxylic acid, utilizing as the starting material, 2-methyl-3-quinolinecarboxylic acid or 3-methyl-2-quinolinecarboxylic acid or the alkyl ester of either of the above compounds.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: July 10, 1984
    Assignee: American Cyanamid Company
    Inventor: David W. Ladner
  • Aniline intermediates
    Patent number: 4404402
    Abstract: There are provided novel substituted aniline intermediates, useful in the synthesis of certain substituted N-nitroanilines or salts thereof which may be used to elicit several desirable and advantageous biological responses in plants.
    Type: Grant
    Filed: March 4, 1982
    Date of Patent: September 13, 1983
    Assignee: American Cyanamid Company
    Inventors: David W. Ladner, Barrington Cross