Patents by Inventor Henriëtte C. Van Den Broeck

Henriëtte C. Van Den Broeck 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).

  • Fungal cellulases
    Patent number: 6306635
    Abstract: The present invention provides polypeptides with cellulase activity, corresponding DNA sequences, vectors, transformed hosts and a method for the production of these polypeptides, which are obtainable from Aspergillus niger var. niger or Aspergillus niger var. tubigensis.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: October 23, 2001
    Assignee: Gist-Brocades B.V.
    Inventors: Henriëtte C. Van Den Broeck, Leendert H. De Graaff, Jacob Visser, Albert J. J. Van Ooijen
  • Fungal cellulases
    Patent number: 6190890
    Abstract: The present invention relates to peptides with multiple enzymatic activitives: carboxymethyl cellusase(CMCase), endoglucanase and &bgr;-glucanase, corresponding nucleotides, vectors and transformed hosts, methods of preparation and use. The peptide is used in the food industry for the liquefaction of plant cell material, e.g., in vegetable or fruit juice manufacture, or as processing aids to reduce the fouling of membranes.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: February 20, 2001
    Assignee: Gist-brocades, B.V.
    Inventors: Henriëtte C. Van Den Broeck, Leendert H. De Graaff, Jacob Visser, Albert J. J. Van Ooijen
  • Method to alter the properties of acetylated xylan
    Patent number: 6010892
    Abstract: Methods and DNA constructs are provided for the expression of a fungal acetyl xylan esterase gene in microbial hosts. A purified fungal acetyl xylan esterase is obtained which is suited for the use as an accessory enzyme in the degradation of acetylated xylans.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: January 4, 2000
    Assignee: Gist-brocades, B.V.
    Inventors: Leendert H. De Graaff, Jacob Visser, Henriette C. Van Den Broeck, Francois Strozyk, Felix J. M. Kormelink, Johannes C. P. Boonman
  • Method to alter the properties of acetylated xylan
    Patent number: 5763260
    Abstract: Methods and DNA constructs are provided for the expression of a fungal acetyl xylan esterase gene in microbial hosts. A purified fungal acetyl xylan esterase is obtained which is suited for the use as an accessory enzyme in the degradation of acetylated xylans.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: June 9, 1998
    Assignee: Gist-brocades, B.V.
    Inventors: Leendert H. De Graaff, Jacob Visser, Henriette C. Van Den Broeck, Francois Strozyk, Felix J. M. Kormelink, Johannes C. P. Boonman
  • Cloning and expression of acetyl xylan esterases from fungal origin
    Patent number: 5681732
    Abstract: Methods and DNA constructs are provided for the expression of a fungal acetyl xylan esterase gene in microbial hosts. A purified fungal acetyl xylan esterase is obtained which is suited for the use as an accessory enzyme in the degradation of acetylated xylans.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: October 28, 1997
    Assignee: Gist-brocades, B.V.
    Inventors: Leendert H. De Graaff, Jacob Visser, Henriette C. Van Den Broeck, Francois Strozyk, Felix J. M. Kormelink, Johannes C. P. Boonman
  • Cloning and expression of xylanase B
    Patent number: 5610046
    Abstract: Method and expression constructs are provided for the cloning of genes from fungal origin which encode polypeptides having the activity of the Aspergillus tubigensis XYL B enzyme and their overexpression in a selected microbial host cell. The present invention provides for the high level production of XYL B which may be used in a variety of industrial applications.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: March 11, 1997
    Assignee: Gist-brocades, N.V.
    Inventors: Albert J. J. van Ooyen, Leendert H. DeGraaff, Henriette C. van den Broeck, Jacob Visser
  • Cloning and expression of acetyl xylan esterases from fungal origin
    Patent number: 5426043
    Abstract: Methods and DNA constructs are provided for the expression of a fungal acetyl xylan esterase gene in microbial hosts. A purified fungal acetyl xylan esterase is obtained which is suited for the use as an accessory enzyme in the degradation of acetylated xylans.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: June 20, 1995
    Assignee: Gist-Brocades, N.V.
    Inventors: Leendert H. De Graaff, Jacob Visser, Henriette C. Van Den Broeck, Francois Strozyk, Felix J. M. Kormelink, Johannes C. P. Boonman
  • Cloning and expression of xylanase genes from fungal origin
    Patent number: 5358864
    Abstract: Methods and expression constructs are provided for the cloning and overexpression of xylanases of fungai origin in a selected microbial host cell. Xylanases of fungal origin generally have lower pH optima and remain stable over a broader pH range than do xylanases of bacterial origin. The present invention provides for the high level production of fungal xylanases which are may be used in a variety of industrial applications requiring xylanase activity at a low pH.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: October 25, 1994
    Assignee: Gist-Brocades, N.V.
    Inventors: Henriette C. van den Broeck, Leendert H. de Graaff, Jan D. R. Hille, Albert J. J. van Ooyen, Jacob Visser, Abraham Harder