Patents by Inventor Egil Kleven

Egil Kleven 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).

  • Fire retarding composition and a method for impregnation of a combustible material
    Patent number: 6042639
    Abstract: Fire retarding and smoke inhibiting aqueous composition and a method for a one-step impregnation of aqueous-absorbable--and normally inflammable materials, such as wood, paper and textiles, said composition comprising ammoniumphosphates, phosphoric acid, water soluble metal salts with ability to form water insoluble salts with phosphate ions and/or ammoniumphosphate ions, and other optional additives.The composition comprises in combination:0.5-90% by weight monoammoniumphosphate and/or diammoniumphosphate,0.1-30% water-soluble metal salts with ability to form water insoluble salts with phosphate ions and/or ammoniumphosphate ions,1-20% by weight acid especially phosphoric acid (85%),1-15 % by weight dicyandiamide, andoptionally up to 5% by weight additivesin a total concentration of from 1 to 50% by weight with respect to the total weight of the aqueous solution, whereby phosphoric acid and dicyandiamide are present in the form of the reaction product guanylureaphosphate.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: March 28, 2000
    Assignee: Fireguard Scandinavia AS
    Inventors: Arve Valso, Egil Kleven