Patents by Inventor Heinrich Dumke

Heinrich Dumke 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).

  • Method of producing declustered acetyl cellulose fibers
    Patent number: 5630873
    Abstract: A delustering composition for acetyl cellulose fibers is described which contains 15 to 85% by weight TiO.sub.2, 15 to 85% by weight paraffin oil and 0.5 to 10% by weight dispersing agent. Furthermore, a method for producing the delustering composition and also the use thereof for delustering acetyl cellulose fibers is described. Finally, the use of the delustered acetyl cellulose fibers in the production of cigarette filters and textile products is described.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: May 20, 1997
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Peter Weiser, Franz Meyers, Jorg Hocken, Heinrich Dumke