Patents by Inventor Richard A. G. Kruger

Richard A. G. Kruger 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).

  • Method of producing in water-containing celluose solutions in water-containing tertiary amine N-oxides
    Patent number: 5948905
    Abstract: Process for preparing a solution of cellulose in water-containing tertiary amine N-oxides via preparation of a mixture containing cellulose, tertiary amine N-oxides and water and subsequent reduction of the water content of this mixture, whereby in a first step heat is supplied to the mixture which is subjected to a pressure higher than the partial pressure of the water contained in the mixture, and in a second step the mixture is subjected to flash evaporation, whereby water is evaporated under reduced pressure.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: September 7, 1999
    Assignee: Akzo Nobel NV
    Inventors: Hans-Georg Connor, Ulrich W. Wachsmann, Richard A. G. Kruger