Patents by Inventor Herbert Muffler

Herbert Muffler 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 the manufacture of 2,3-perfluoro-1,4-dioxanes as well as some special representatives of compounds of this class
    Patent number: 4343742
    Abstract: 2,3-Perfluoro-1,4-dioxanes of the formula I ##STR1## wherein X and Y independently from one another mean F or CF.sub.3, are manufactured by reacting carbonyl compounds of the formula II ##STR2## wherein X has the same meaning as in formula I,Y' has the same meaning as Y in formula I (F, CF.sub.3), and additionally can be Cl andZ=Cl, mesylate [=OSO.sub.2 CH.sub.3 ] or tosylate=[OSO.sub.2 C.sub.4 H.sub.6 --CH.sub.3 (p)],with alkali metal fluorides and/or with ammonium fluoride. The reaction products I, among which those wherein at least one of both radicals X and Y is CF.sub.3 are novel compounds, are solvents for highly fluorinated compounds and intermediates in various application fields.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: August 10, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Herbert Muffler, Gunter Siegemund, Werner Schwertfeger
  • Process for the preparation of 4,5-perfluoro-1,3-dioxalanes
    Patent number: 4287124
    Abstract: 4,5-Perfluoro-1,3-dioxolanes prepared by the described process have an anesthetic effect.
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: September 1, 1981
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gunter Siegemund, Herbert Muffler