Patents by Inventor Soren Gustavsson

Soren Gustavsson 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 for the continuous cooking of pulp in a digester system having a top separator
    Patent number: 6203662
    Abstract: This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy, and, at the same time, achieving very good pulp properties.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: March 20, 2001
    Assignee: Kvaerner Pulping AB
    Inventors: Vidar Snekkenes, Johan Engström, Krister Olsson, Mikael Lindström, Christofer Lindgren, Sören Gustavsson
  • Method and device for the continuous cooking of pulp
    Patent number: 6159336
    Abstract: This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy, and, at the same time, achieving very good pulp properties.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: December 12, 2000
    Assignee: Kvaerner Pulping AB
    Inventors: Johan Engstrom, Vidar Snekkenes, Krister Olsson, Mikael Lindstrom, Christofer Lindgren, Soren Gustavsson
  • Method for the continuous cooking of pulp
    Patent number: 6123807
    Abstract: This invention relates to a new and improved way of continuously cooking fiber material, wherein temperatures and alkaline levels are controlled to be maintained within specific levels in different zones of the digesting process in order to optimize chemical consumption and heat-economy and at the same time achieve very good pulp properties.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: September 26, 2000
    Assignee: Kvaerner Pulping AB
    Inventors: Johan Engstrom, Vidar Snekkenes, Krister Olsson, Soren Gustavsson, Christofer Lindgren, Mikael Lindstrom
  • Pulp production
    Patent number: 5593544
    Abstract: A method of manufacturing chemical pulp out of comminuted cellulosic fiber material comprising digesting the fiber material with digestion liquid without preceding peroxide stage. According to the invention the comminuted fiber material is treated in at least one stage prior to said digestion, in the presence of a liquid containing at least one compound having the ability to form complexes with metals existing naturally in the fiber material.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: January 14, 1997
    Assignee: Kvaerner Pulping Aktiebolag
    Inventors: Christer Fahlgren, Soren Gustavsson, Petter Tibbling, Ewa W. Johansson