Patents by Inventor Alfred Trepow

Alfred Trepow 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).

  • EFFECT OF LOW DOSE XYLANASE ON PULP IN PREBLEACH TREATMENT PROCESS
    Publication number: 20150240423
    Abstract: A prebleach treatment of pulp with xylanase enzyme prior to chemical bleaching is disclosed. A process of making pulp comprises treating a pulp with xylanase in an amount of less than 50 g of xylanase per ton of pulp. The treating step is carried while buffering the pulp and xylanase with a buffering agent to a pH of from about 6.5 to about 7.5 prior to at least one bleaching stage to form a treated pulp.
    Type: Application
    Filed: May 13, 2015
    Publication date: August 27, 2015
    Inventors: CAIFANG YIN, ALFRED TREPOW, JACEK KALKA, GOPAL GOYAL
  • EFFECT OF LOW DOSE XYLANASE ON PULP IN PREBLEACH TREATMENT PROCESS
    Publication number: 20110108222
    Abstract: A prebleach treatment of pulp with xylanase enzyme prior to chemical bleaching is disclosed. A process of making pulp comprises treating a pulp with xylanase in an amount of less than 50 g of xylanase per ton of pulp. The treating step is carried while buffering the pulp and xylanase with a buffering agent to a pH of from about 6.5 to about 7.5 prior to at least one bleaching stage to form a treated pulp.
    Type: Application
    Filed: November 12, 2010
    Publication date: May 12, 2011
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: Caifang Yin, Gopal Goyal, Alfred Trepow, Jacek Kalka