Patents by Inventor Wolfgang Wizani

Wolfgang Wizani 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).

  • Process for the production of viscose pulp
    Patent number: 5676795
    Abstract: The present invention relates to a process for producing viscose pulp from lignocelluloses, such as hardwood, softwood or annual plants, in which process the lignocellulose is treated in a digester at first with saturated steam to prehydrolyze hemicelluloses and subsequently, without flashing, with hot black liquor (HSL) of a preceding sulfate pulp digestion as well as, if desired, under addition of fresh white liquor (WL) to neutralize the acidic reaction products formed, neutralization liquor (NL) thus being formed in the digester. Upon addition of the amount of alkali required for delignification in the form of fresh white liquor (WL), if desired, in combination with a displacement of neutralization liquor (NL) and temperature adjustment, digestion then will take place with or without temperature gradient.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: October 14, 1997
    Assignees: Voest-Alpine Industrieanlagenbau GmbH, Lenzing Aktiengesellschaft
    Inventors: Wolfgang Wizani, Andreas Krotscheck, Johann Schuster, Karl Lackner
  • Preparation of xylanase by cultivating Thermomyces lanuginosus DSM 5826 in a medium containing corn cobs
    Patent number: 5183753
    Abstract: Xylanase is prepared by cultivation of a fungus in a nutrient medium which contains corn cobs. The fungus is preferably Thermomyces lanuginosus DSM 5826 which produces an exo- and endo- cellulase-free xylanase.
    Type: Grant
    Filed: May 8, 1991
    Date of Patent: February 2, 1993
    Assignee: Voest-Alpine Industrienlagenbau Gesellschaft m.b.H.
    Inventors: Wolfgang Wizani, Hermann Esterbauer, Walter Steiner, Joseph Gomes