Patents by Inventor John F. Wehner

John F. Wehner 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 treating metal chlorides
    Patent number: 5624490
    Abstract: A process for preparing high strength, rock-like, water-resistant aggregates by high intensity mixing of acidic metal chlorides and alkaline/cementitious materials in the presence of a low water ratio wherein the metal chlorides are simultaneously neutralized/stabilized and the mixture is solidified.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: April 29, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter Hill, Michael T. Hyzny, John F. Wehner
  • Process for preparing 1,1-dichloro-1-fluoroethane
    Patent number: 5105033
    Abstract: A manufacturing process is disclosed for preparing 1,1-dichloro-1-fluorethane by the addition of hydrogen fluoride to 1,1-dichloroethylene in the presence of a hydrofluorination catalyst providing 1,1-dichloro-1-fluoroethane in high yields and reduced 1,1-dichloroethylene content.Additionally, a process is disclosed for reducing the 1,1-dichloroethylene content of a mixture of 1,1-dichloroethylene and 1,1-dichloro-1-fluoroethane.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: April 14, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Steven H. Swearingen, John F. Wehner, Marlin G. Ridley