Patents by Inventor Johann Jelen

Johann Jelen 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 preparation of chlorinated polymers
    Patent number: 4206093
    Abstract: A process for the preparation of chlorinated aliphatic polymers wherein chlorine-free polymers are chlorinated by using gaseous chlorine in chlorinated hydrocarbons as solvents and the chlorinated aliphatic polymers are recovered from the chlorinating solution by steam distillation in which process from 15 to 50% by weight of a lacquer resin is added to the chlorinating solution before steam distillation. The chlorinated polymers contain less residual solvent.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: June 3, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Hoehne, Johann Jelen, Diez Heine, Rolf Baatz
  • Process for the preparation of chlorinated polymers
    Patent number: 4144203
    Abstract: A process for the preparation of a chlorinated aliphatic polymer which comprises chlorinating a chlorine-free aliphatic polymer in a chlorinated hydrocarbon solvent using gaseous chlorine as the chlorinating agent; adding from 2 to 25% by weight, based on the chlorinated polymer, of at least one plasticizer and/or at least one lacquer resin, to the chlorination solution; and isolating the chlorinated aliphatic polymer from the chlorination solution by steam distillation.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: March 13, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Hoehne, Johann Jelen, Diez Heine, Rolf Baatz