Patents by Inventor Bryan L. Sorensen

Bryan L. Sorensen 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 pre-treating woodchips prior to mechanical pulping
    Patent number: 7943008
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 17, 2011
    Assignee: Packaging Corporation of America
    Inventors: Ventzislav H. Kirov, Anil Sethy, Bryan L. Sorensen
  • METHOD OF PRE-TREATING WOODCHIPS PRIOR TO MECHANICAL PULPING
    Publication number: 20100276092
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Application
    Filed: July 12, 2010
    Publication date: November 4, 2010
    Inventors: Ventzislav H. Kirov, Anil Sethy, Bryan L. Sorensen
  • Method of pre-treating woodchips prior to mechanical pulping
    Patent number: 7771565
    Abstract: A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: August 10, 2010
    Assignee: Packaging Corporation of America
    Inventors: Ventzislav H. Kirov, Anil Sethy, Bryan L. Sorensen