Patents by Inventor Walter Voser

Walter Voser 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).

  • Ionically modified cellulose material, its preparation and its use
    Patent number: 4577013
    Abstract: Ionically modified cellulose material in which the ionic moiety is linked to the cellulose moiety via the carbonyl group of the bridge member --CO--NH--CH.sub.2 --O-- is suitable for being employed as the stationary phase in processes for separating mixtures of ionically charged components by chromatography, if the ionically modified cellulose material is obtainable from microcrystalline wood cellulose in the form of powder, as the starting material, the cellulose having a degree of polymerization of 490 to 550, and the cellulose powder consisting of particles having a specific BET surface area of 0.8 to 1.1 m.sup.2 /g and a degree of swelling in water at 20.degree. C. of 4 to 6 ml/g.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: March 18, 1986
    Assignee: Ciba-Geigy Corporation
    Inventors: Jurg Merz, Walter Voser