Patents by Inventor Sven Fredriksson

Sven Fredriksson 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).

  • Sound absorbent and heat insulating fiber slab
    Patent number: 5206081
    Abstract: A sound absorbing and heat insulating fiber slab containing cellulose fibers which are bonded together with the aid of an inorganic, flame-proof binder is characterized in that the binder belongs to the group of polymeric silicates which dry at room temperature. The binder is homogeneously distributed in the slab and bonds mutually adjacent fibers in a punctiform fashion, to form a coherent matrix. The slab has a density of from 30 to 70 kg/m.sup.3 and the binder is present in an amount of 1-20 percent by weight.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: April 27, 1993
    Inventor: Sven Fredriksson