Patents by Inventor Peter Hammerschmidt

Peter Hammerschmidt 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).

  • Support film and pressure-sensitive adhesive tape
    Patent number: 4673611
    Abstract: A pressure-sensitive adhesive tape is described, which comprises a support film formed of a co-extruded, biaxially oriented multilayer polypropylene film and an adhesive coating applied to one surface of the film. The support film is composed of at least first and second layers having different compositions. The second layer of the support film, which faces away from the adhesive coating, has a thickness of less than one third of the total thickness of the adhesive tape, and contains an anti-adhesive substance.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: June 16, 1987
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Guenther Crass, Annegrete Bursch, Peter Hammerschmidt
  • Adhesive tape
    Patent number: 4525416
    Abstract: An adhesive tape is described, which is destroyed by delamination upon removal from a substrate but which may be unwound from a supply roll without destruction. The adhesive tape comprises an inner layer of a polyolefin having 2 to 6 carbon atoms containing in a finely distributed form solid organic particles with a size of from about 0.2 to 20 microns and polyolefin cover layers on both sides of the inner layer, one of which is coated with an adhesive and the other with a release coat.
    Type: Grant
    Filed: May 3, 1983
    Date of Patent: June 25, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Hammerschmidt, Gunther Crass
  • Adhesive tape
    Patent number: 4397905
    Abstract: Disclosed is an adhesive tape comprising a support film of a synthetic thermoplastic polymer, preferably polyvinylchloride or polypropylene, and an adhesive layer on one side of it, wherein the support film has a thickness less than about 35 .mu.m and preferably is stretch-oriented. Provided on the surface of the support film facing away from the adhesive layer are elevations having a depth within a range of from about 5 to 20 .mu.m.
    Type: Grant
    Filed: November 7, 1980
    Date of Patent: August 9, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Dettmer, Peter Hammerschmidt