Patents by Inventor Helwig Tuebner

Helwig Tuebner 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).

  • Patent number: 4438264
    Abstract: A process for the production of hydroxyethyl methyl cellulose having a flocculation point of at least 100.degree. C. by carrying out the alkalization and hydroxyethylation of the cellulose in liquid methyl chloride.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: March 20, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Balser, Helwig Tuebner, Wilhelm Oppermann