Patents by Inventor Jan Hakala

Jan Hakala 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).

  • Mineral fibre
    Patent number: 6218322
    Abstract: The invention concerns a mineral fibre having the following composition in % by weight: SiO2 50-60, A12O3 1-6, MgO 16-22, CaO 12-18, Na2O+K2O 0-3, Fe2 O31-8, P2O5 1-6, other 0-3, whereby the weight ratio CaO/MgO<1 and the sum CaO+MgO=30-38% by weight.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: April 17, 2001
    Assignee: Partex Paroc Oy AB
    Inventors: Michael Perander, Jan Hakala