Patents by Inventor Johannes Eicher

Johannes Eicher 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 preparing fluorine-containing ethane derivatives
    Patent number: 5283381
    Abstract: A process for preparing fluorine-containing ethane derivatives using hydrogen fluoride and a catalytically active formulation comprising a tantalum fluorosulfonate compound or a niobium fluorosulfonate compound is described. The process is particularly suitable for preparing ethane derivatives which contain a CF.sub.3 group, for example for preparing CF.sub.3 CHCl.sub.2 (R123) from perchloroethylene.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: February 1, 1994
    Assignee: Solvay Fluor und Derivate GmbH
    Inventors: Johannes Eicher, Karl-Heinz Fazniewscy, Werner Rudolph
  • Process for preparing fluorine-containing ethane derivatives
    Patent number: 5227546
    Abstract: A process for preparing fluorine-containing ethane derivatives using hydrogen fluoride and a catalytically active formulation comprising a tantalum fluorosulfonate compound or a niobium fluorosulfonate compound is described. The process is particularly suitable for preparing ethane derivatives which contain a CF.sub.3 group, for example for preparing C.sub.3 CHCl.sub.2 (R123) from perchloroethylene.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: July 13, 1993
    Assignee: Solvay Fluor und Derivate GmbH
    Inventors: Johannes Eicher, Karl-Heinz Fazniewscy, Werner Rudolph, Hans-Walter Swidersky
  • Method of preparing fluorine-containing ethane derivatives
    Patent number: 5214223
    Abstract: A method of preparing fluorine-containing ethane derivatives using a catalyst mixture which comprises a metal halide and a sulfonic acid derivative is described. The method is particularly well suited for preparing CF.sub.3 CHCl.sub.2 (R123) from perchloroethylene and for preparing CF.sub.3 CH.sub.2 F (R134a) from trifluoroethylene.
    Type: Grant
    Filed: July 14, 1992
    Date of Patent: May 25, 1993
    Assignee: Kali-Chemie AG
    Inventors: Johannes Eicher, Karlheinz Fazniewscy, Werner Rudolph, Hans-Walter Swidersky
  • Method of preparing fluorine-containing ethane derivatives
    Patent number: 5171900
    Abstract: A method of preparing fluorine-containing ethane derivatives using a catalyst mixture which comprises a metal halide and a sulfonic acid derivative is described. The method is particularly well suited for preparing CF.sub.3 CHCl.sub.2 (R123) from perchloroethylene and for preparing CF.sub.3 CH.sub.2 F (R134a) from trifluoroethylene.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: December 15, 1992
    Assignee: Kali-Chemie AG
    Inventors: Johannes Eicher, Karlheinz Fazniewscy, Werner Rudolph, Hans-Walter Swidersky