Patents by Inventor John Harry Orth

John Harry Orth 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).

  • Preparation of diamine carbamates
    Patent number: 5981797
    Abstract: Diamine carbamates are prepared by spraying liquid diamine into carbon dioxide gas, in the optional presence of a propellant.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: November 9, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Harry Orth
  • Preparation of nylon salts from diamine carbamates and dicarboxylic acids
    Patent number: 5874520
    Abstract: Substantially anhydrous nylon salts are made in a solid state process in which solid diamine carbamates are contacted and mixed with solid dicarboxylic acids in a near instantaneous reaction to produce the salt, and preferably are prepared by mixing the solid diamine carbamates and the solid dicarboxylic acids under conditions of high shear.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: February 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Harry Orth