Patents by Inventor Hans-Werner Dorr

Hans-Werner Dorr 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 transformation of a comminuted swellable cellulose ether into an easily workable material
    Patent number: 4069082
    Abstract: This invention relates to an improvement in the process for the transformation of comminuted cellulose ether, which has been rendered at least largely water-insoluble by modification, but which is still highly swellable with water, into an easily workable material, in which process the modified cellulose ether is attached to a hydrophilic support web, the improvement comprising dispersing the modified cellulose ether in a solution of unmodified cellulose ether in an organic solvent, coating the support on at least one of its surfaces with the dispersion, and then drying.
    Type: Grant
    Filed: December 6, 1976
    Date of Patent: January 17, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ludwig Grosse, Hans-Werner Dorr