Patents by Inventor Ursula Kolken

Ursula Kolken 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: 6475419
    Abstract: Methods of preparing cellulose materials, which methods comprise (a) reacting a cellulosic material with a first basic component to form alkli cellulose; (b) reacting the alkali cellulose with carbon disulfide and a second basic component to form a cellulose xanthate solution; and (c) extruding the cellulose xanthate into an aqueous coagulation bath; wherein a reaction product of an epoxide of the general formula (I): wherein R1 represents a linear or branched aliphatic alkyl group having from about 1 to about 22 carbon atoms, and an amine compound of the general formula (II): wherein R2 and R3 each independently represent a substituent selected from the group consisting of —CnH2n—O)m—H, alkyl groups having from about 1 to about 22 carbon atoms, and hydrogen, wherein n represents 2 or 3 and m represents a number of from about 1 to about 20; is present in at least one of the cellulose xanthate solution and the aqueous coagulation bath, are described.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: November 5, 2002
    Assignee: Cognis Deutschland GmbH
    Inventors: Martin Lagarden, Raymond Mathis, Ursula Kolken