Patents by Inventor Thomas W. Drabb

Thomas W. Drabb 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 Production of Fused, Tricyclic Sulfonamides
    Publication number: 20110034691
    Abstract: The present invention provides methods, i.e., scalable or large-scale processes for the production of fused, tricyclic sulfonamido analogs, such as substituted or unsubstituted 5-(aryl-sulfonyl)-4,5-dihydro-1H-pyrazolo[4,3-c]quinolines and 5-(heteroaryl-sulfonyl)-4,5-dihydro-1H-pyrazolo[4,3-c]quinolines. Exemplary methods of the invention include an intra-molecular cyclization step, in which a carbon-nitrogen bond is formed, and which employs a copper-based catalyst that contains at least one organic ligand, such as DMEDA. The invention further provides compounds, which are useful as intermediates in the methods of the invention.
    Type: Application
    Filed: March 24, 2010
    Publication date: February 10, 2011
    Inventors: Michael S. Dappen, Jacek J. Jagodzinski, Lee H. Latimer, Jing Wu, Jollie Duaine Godfrey, JR., Robert Michael Matunas, Thomas W. Drabb, Gary Probst
  • Process for the manufacture of herbicidal 1-{[2-(cyclopropylcarbonyl)phyenyl]sulfamoyl}-3-(4,6-dialkoxy-2-pyrimidi nyl)urea compounds
    Patent number: 5559234
    Abstract: There is provided an effective and efficient, three step process for the manufacture of crop-selective, herbicidal 1-{[2-(cyclopropylcarbonyl)phenyl]sulfamoyl}-3-(4,6-dialkoxy-2-pyrimidinyl )urea compounds, and an intermediate for use therein.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: September 24, 1996
    Assignee: American Cyanamid Company
    Inventor: Thomas W. Drabb, Jr.
  • Method for the preparation of 4'-(substituted)-amino-2-(substituted) amino-3',5'-dichloroacetophenone and salts thereof
    Patent number: 4906781
    Abstract: A method for the preparation of 4'-(substituted)-amino-2-(substituted)amino-3',5'-dichloroacetophenone and salts thereof. The method involves the chlorination of the corresponding 4'-(substituted)amino-2-(substituted) aminoacetophenone and acid addition salts thereof in the presence of an anhydrous or aqueous solvent selected from ethyl alcohol, t-butyl alcohol and acetic acid. The invention describes the preparation of 4'-amino-2-(t-butylamino)-3',5'-dichloroacetophenone and the hydrochloride thereof.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: March 6, 1990
    Assignee: American Cyanamid Company
    Inventor: Thomas W. Drabb, Jr.
  • Method for the preparation of certain pyridine and quinoline 2,3-dicarboxylic anhydrides
    Patent number: 4439607
    Abstract: The present invention relates to a process for the preparation of substituted pyridine and quinoline-2,3-dicarboxylic anhydrides, and the herbicidally effective imidazolinyl pyridine and quinoline compounds prepared therefrom.
    Type: Grant
    Filed: May 25, 1982
    Date of Patent: March 27, 1984
    Assignee: American Cyanamid Company
    Inventor: Thomas W. Drabb
  • Oxalylated amidinohydrazones, method for preparing same and use as insect and fire ant control agents
    Patent number: 4322422
    Abstract: There are provided certain oxalylated amidinohydrazones, and methods of use of the compounds for the control of insects, especially Lepidopterous insects, and for the control of ants, family Formicidae, especially fire ants.
    Type: Grant
    Filed: May 13, 1980
    Date of Patent: March 30, 1982
    Assignee: American Cyanamid Co.
    Inventors: Roger W. Addor, Thomas W. Drabb, Jr.
  • Pentadienone hydrazones, method for preparing the same, and insecticidal use thereof
    Patent number: 4191768
    Abstract: There are provided insecticidal pentadienone hydrazones and methods of preparation thereof. There is further provided a method for using the aforesaid compounds for the control of insects, especially Lepidopterous insects, and for the control of ants, Family Formicidae, especially fire ants.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: March 4, 1980
    Assignee: American Cyanamid Company
    Inventors: Thomas W. Drabb, Jr., James B. Lovell
  • Acylated pentadienone hydrazone, method for preparing the same, and use as fire ant control agents
    Patent number: 4152436
    Abstract: There are provided certain acylated pentadienone hydrazones, and methods of use of said compounds for the control of insects, especially Lepidopterous insects, and for the control of ants, Family Formicidae, especially fire ants.
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: May 1, 1979
    Assignee: American Cyanamid Company
    Inventor: Thomas W. Drabb, Jr.