Patents by Inventor Roberta Lee Farrell

Roberta Lee Farrell 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).

  • Fungi for improvements of wood and pulp appearance and qualities
    Publication number: 20020096273
    Abstract: The invention relates to the use of fungi stains of Ophiostoma floccosum, Ophiostoma piceae or Ophiostoma pluruanulatum, or mixtures on wood and pulp to improve chemical pulping processes and/or reduce cooking tie and/or improve brightness and/or decrease extractives.
    Type: Application
    Filed: March 30, 2001
    Publication date: July 25, 2002
    Inventor: Roberta Lee Farrell
  • Alkalitolerant xylanases
    Patent number: 6140095
    Abstract: The present invention discloses enzymes having xylanase considerable activity at a pH of 9.0 and a temperature of 70.degree. C. The enzymes are obtainable from deposited strains which are related to alkaliphilic Bacilli. The enzymes are suited for use in paper and pulp production processes.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: October 31, 2000
    Assignee: DSM N.V.
    Inventors: Diane P. Williams, Sara Iverson, Roberta Lee Farrell, Pieter Van Solingen, Wilhelmina Theresia Herbes, Wilhelmus Antonius H. Van Der Kleij, Rudolf Franciscus C. Van Beckhoven, Wilhelmus Johannes Quax, Margaretha Adriana Herwijer, Frits Goedegebuur, Brian Edward Jones
  • Thermostable xylanases
    Patent number: 6083733
    Abstract: The present invention discloses enzymes having xylanase activity. The xylanases are characterized in that they are active at a temperature of 80.degree. C. or higher. The enzymes are obtainable from anaerobic thermophilic bacteria. The enzymes are suited for use in paper and pulp production processes. The invention also describes cloning and expression of genes having xylanase activity obtained from the deposited strains.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: July 4, 2000
    Assignee: Gist-brocades B.V.
    Inventors: Vidar Gronberg, Simon Forster, Dean Moody, Diane P. Williams, Sara Iverson, Roberta Lee Farrell, Peter Leonard Bergquist, McIver Daniel, Hugh William Morgan, Wilhelmus Johannes Quax, Margareta Adriana Herweijer, Brian Edward Jones
  • Mating process for preparing Ophiostoma piliferum fungi for pitch reduction
    Patent number: 5695975
    Abstract: This invention relates to a method of obtaining a fungus of the species Ophiostoma piliferum by selective mating of strains of the fungus and selecting for an ascospore offspring which grows white or colorless, and has the ability to reduce pitch in Southern Yellow Pine wood chips.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 9, 1997
    Assignee: Clariant Finance (BVI) Limited
    Inventors: Wendy C. Zimmerman, Roberta Lee Farrell