Patents by Inventor Wendel R. Cassel

Wendel R. Cassel 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).

  • Purification of saturated halocarbons
    Patent number: 5449845
    Abstract: A process for reducing the content of unsaturated impurities in saturated fluorohalocarbons and fluorohalohydrocarbons by contacting the impure saturated fluorohalocarbon and/or fluorohalohydrocarbon in a substantially dry fluid state with a substantially dry amorphous solid metal oxide composition consisting essentially of cupric oxide, cobaltic oxide, silver oxide, manganese dioxide, or a mixture of any two or more thereof, at an effective temperature up to about 300.degree. C.
    Type: Grant
    Filed: October 2, 1990
    Date of Patent: September 12, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard E. Fernandez, Wendel R. Cassel
  • Halogen exchange fluorination
    Patent number: 4990701
    Abstract: A process for halogen exchange fluorination by contacting a halocarbon having a replaceable halogen other than fluorine with KF.nHF wherein n is 0.5-3 to provide a fluorinated hydrocarbon having at least one more fluorine than the starting halocarbon and, optionally, regenerating the KF.nHF with additional HF, or in a continuous process, with excess HF in the feed.
    Type: Grant
    Filed: March 20, 1990
    Date of Patent: February 5, 1991
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Wendel R. Cassel, Richard E. Fernandez, Frederick W. Mader
  • Halogen exchange fluorination
    Patent number: 4990702
    Abstract: A process for halogen exchange fluorination by contacting a halocarbon having a replaceable halogen other than fluorine with CsF or RbF.multidot.nHF wherein n is 0.5-3 to provide a fluorinated hydrocarbon having at least one more fluorine than the starting halocarbon and, optionally, regenerating the MF.multidot.nHF with additional HF, or in a continuous process, with excess HF in the feed.
    Type: Grant
    Filed: February 15, 1990
    Date of Patent: February 5, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard E. Fernandez, Wendel R. Cassel, Frederick W. Mader