Patents by Inventor Peter Doblanzki

Peter Doblanzki 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).

  • Patent number: 5294299
    Abstract: Paper, cardboard or paperboard-like material containing inorganic fibres, inorganic particle-like additives and organic binders and flocculating agents characterized in that(1) the particle-like inorganic additives constitute 40-80% by weight of the dry matter of the material;(2) the inorganic particle-like additives are composed of(2.1) a base filler of which at least 20% by weight has a particle size of <2 .mu.m and not more than 20% by weight has a particle size of >20 .mu.m on the one hand and <0.5 .mu.m on the other hand, and(2.2) an anionic flocculating active pigment of which at least 50% by weight has a primary particle size of <2 .mu.m,(3.1) the organic flocculating agent is a cationic polymeric carbohydrate with an average molecular weight of 100,000 to 2,000,000 and a degree of substitution of 0.01 to 0.3 and is present in a quantity of 0.5 to 6% by weight, based on the dry matter of the material, and(3.2) 1000 g of base filler is unable to bind more than 0.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: March 15, 1994
    Inventors: Manfred Zeuner, Peter Doblanzki