Patents by Inventor Calus-Dieter Sommerfeld

Calus-Dieter Sommerfeld 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).

  • C.sub.3 to C.sub.5 polyfluoroalkanes propellants
    Patent number: 5496867
    Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: March 5, 1996
    Assignee: Bayer Aktiengesellschaft
    Inventors: Calus-Dieter Sommerfeld, Wilhelm Lamberts, Dietmar Bielefeldt, Albrecht Marhold, Michael Negele