Patents by Inventor Torsten Holtkötter

Torsten Holtkötter 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: 6667395
    Abstract: A description is given of a process for the industrial preparation of methylhydroxyalkylcelluloses (MHACs) by reaction of cellulose with alkali metal hydroxide and subsequent reaction with an alkyl halide and hydroxyalkylating agent, characterized in that the reaction is carried out batchwise in a reactor which has an L/D ratio of less than 2.5 and in which the unmixed regions are minimized and the batch reactor is preceded at the inlet by a continuously operated cellulose milling facility and is followed at the outlet by a continuously running plant for milling and drying the products, with the product being transported by action of gravity. An apparatus for carrying out this process and the methylhydroxyalkylcellulose obtainable by the process are also described.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: December 23, 2003
    Assignee: Wolff Cellulosics GmbH & Co. KG
    Inventors: Torsten Holtkötter, Stefan Michel, Gerd Sonnenberg