Patents by Inventor Hermann Stemmler

Hermann Stemmler 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: 4355074
    Abstract: Sheet-like material, such as wallpaper, posters or labels, can be stripped dry from surfaces to which they have been bonded after adhesive layers (applied in an aqueous medium) have dried. Adhesives which contain film-forming, water-soluble or water-swellable polymers are used. Separate layers containing two different adhesive polymers, particularly polysaccharide derivatives, are provided between the sheet-like material and the surface to which it is to be bonded, one of the two layers containing at least one non-ionic polymer and the other containing at least one ionic polymer. The invention includes the use of these adhesives (containing different film-forming, water-soluble or water-swellable polymers) in preparing dry-strippable sheet-like material and sheet-like material, such as wallpaper, posters or labels, having adhesive layers which can be reactivated by moistening with water and which comprise these adhesives.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: October 19, 1982
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hermann Stemmler, Volker Knittel