Patents by Inventor Hannu Karhuketo

Hannu Karhuketo 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).

  • Biodegradable multilayer material
    Patent number: 6080478
    Abstract: A multi-layer material including a cellulose-based naturally decomposing basic layer, at least one polyhydroxyalkanoate layer on the basic layer and at least one biodegradable polylactide layer between the basic layer and the at least one polyhydroxyalkanoate layer.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: June 27, 2000
    Assignee: UPM Kymmene Corporation
    Inventor: Hannu Karhuketo
  • Sheet material
    Patent number: 5612129
    Abstract: The invention concerns a paper-based, soft or semi-hard sheet material which contains a core layer of compressed shredded paper with surface layers. The material is suited for use as inner end shields for paper reels, for example.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: March 18, 1997
    Assignee: Yhtyneet Paperitehtaat Oy
    Inventors: Hannu Karhuketo, Alpo A. Pollari, Pentti K. Rautanen