Patents by Inventor Helmut Porkert

Helmut Porkert 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).

  • Preparation of dimethyl polysulphides
    Patent number: 4337359
    Abstract: A process for the preparation of a dimethyl polysulphide of the formulaCH.sub.3 --S.sub.x --CH.sub.3in whichx is at least 1, comprising reacting a polysulphide of the formulaM.sub.y S.sub.xin whichM represents an alkali metal atom or alkaline earth metal atom, andy is 1 or 2, with O,O,O-trimethyl thiophosphate of the formula(CH.sub.3 O).sub.3 P.dbd.S.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: June 29, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Arold, Siegbert Humburger, Hans-Joachim Diehr, Helmut Porkert
  • Process for continuously working up solutions of the type accumulating in the phosgenation of monoamines
    Patent number: 4195032
    Abstract: The present invention relates to an improved process for the continuous production of alkylmonoisocyanates from commercial solutions containing N-alkyl carbamic acid chlorides by thermally decomposing the N-alkyl carbamic acid chlorides in the presence of inert solvents, and recovering the pure monoisocyanates by distillation.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: March 25, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Johannes Koster, Peter Heitkamper, Peter Fuhrmann, Helmut Porkert