Patents by Inventor John M. Hurt

John M. Hurt 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).

  • Vapor state formation of diesters of oxalic acid
    Patent number: 4629806
    Abstract: A continuous vapor state process for the preparation of diesters of oxalic acid from a nitrogen oxide, an alcohol and carbon monoxide.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: December 16, 1986
    Assignee: Union Carbide Corporation
    Inventors: Thomas C. Cleveland, James E. Deitzler, Arthur R. Doumaux, Jr., Joseph P. Henry, John M. Hurt, Louis A. Kapicak, Bernard C. Ream
  • Preparation of nitrite esters
    Patent number: 4353843
    Abstract: A vapor phase process for making methyl or ethyl nitrite from methanol or ethanol, respectively, by reacting a nitrogen oxide composition with methanol or ethanol.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: October 12, 1982
    Assignee: Union Carbide Corporation
    Inventors: Arthur R. Doumaux, Jr., James M. Downey, Joseph P. Henry, John M. Hurt
  • Card grading system
    Patent number: 4031636
    Abstract: Grading true-false and multiple-choice foldable answer cards by compacting them and using a key card in front of a pack of the cards as a guide.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: June 28, 1977
    Inventor: John M. Hurt, Jr.