Patents by Inventor Steven H. Swearingen

Steven H. Swearingen 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 reducing the fluorine content of halocarbons
    Patent number: 5345017
    Abstract: The fluorine content of an acyclic saturated compound of the formula C.sub.n F.sub.a X.sub.b having at least one carbon with at least two fluorine substituents (wherein each X is independently selected from Cl and Br, and wherein n is 1 to 4, a is 2 to 10, b is 0 to 8, and a+b equals 2n+2) is reduced by reacting the acyclic saturated compound with HCl in the vapor phase at an elevated temperature in the presence of a catalyst, the mole ratio of HCl to the acyclic saturated compound being at least about 2:1.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: September 6, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: V. N. Mallikarjuna Rao, Steven H. Swearingen
  • Synthesis of perfluoropropane
    Patent number: 5220083
    Abstract: The present invention relates to syntheses of perfluoropropane-- .e., octafluoropropane--from acyclic three-carbon hydrocarbons or partially or totally halogenated acyclic three-carbon hydrocarbons.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: June 15, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James L. Webster, Steven H. Swearingen, Douglas W. Bruhnke, Leo E. Manzer, Elrey L. McCann
  • 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
  • Multistep synthesis of hexafluoropropylene
    Patent number: 5068472
    Abstract: The present invention relates to multistep syntheses of hexafluoropropylene from hexachloropropylene. In all these syntheses the first step is a fluorination of the starting material; later steps convert the initial products to CF.sub.3 --CFCl--CF.sub.3, which is dehalogenated to the desired product.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: November 26, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James L. Webster, Swiatoslaw Trofimenko, Paul R. Resnick, Douglas W. Bruhnke, Jan J. Lerou, William H. Manogue, Leo E. Manzer, Elrey L. McCann, Steven H. Swearingen, James A. Trainham, Cristobal Bonifaz
  • Multistep synthesis of hexafluoropropylene
    Patent number: 5057634
    Abstract: The present invention relates to multistep syntheses of hexafluoropropylene from acyclic three-carbon hydrocarbons or partially halogenated acyclic three-carbon hydrocarbons. In all these syntheses the first step is a vapor-phase chlorofluorination of the starting material to one or more saturated chlorofluorocarbons. Novel catalysts are also provided.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: October 15, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James L. Webster, Elrey L. McCann, Douglas W. Bruhnke, Jan J. Lerou, William H. Manogue, Leo E. Manzer, Steven H. Swearingen, Swiatoslaw Trofimenko, Cristobal Bonifaz