Patents by Inventor Hans Grosse-Wortmann

Hans Grosse-Wortmann 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 removal of vinyl chloride from polyvinyl chloride dispersions
    Patent number: 4017445
    Abstract: Residual vinyl chloride contents of aqueous polyvinyl chloride dispersions is reduced to less than 50 ppm by withdrawing steam and vinyl chloride contained in a boiling aqueous polyvinyl chloride dispersion at a temperature of 80.degree.-100.degree. C. and at a vaporization rate per minute of 0.006-0.2 kg. steam per kg. of polyvinyl chloride for a period of time from 3-60 minutes until a vinyl chloride content of less than 50 p.p.m. is achieved.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: April 12, 1977
    Assignee: Chemische Werke Huls Aktiengesellschaft
    Inventors: Hans Grosse-Wortmann, Bernhard Hentschel, Peter Rauth, Karl-Heinz Schoenberg, Bernd Terwiesch, Hermann Winter