Patents by Inventor Theresa White

Theresa White 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).

  • Patent number: 8318461
    Abstract: A process for the enzymatic hydrolysis of cellulose to produce a hydrolysis product comprising glucose from a pretreated lignocellulosic feedstock and enzymes for use in the process are provided. The process comprises hydrolyzing an aqueous slurry of a pretreated lignocellulosic feedstock with cellulase enzymes, one or more than one ?-glucosidase enzyme and a binding agent for binding the ?-glucosidase enzyme to fiber solids present in the aqueous slurry. During the hydrolysis, both the cellulase enzyme and ?-glucosidase enzyme bind to the fiber solids. The hydrolysis is performed in a solids-retaining hydrolysis reactor so that unhydrolyzed fiber solids and bound enzyme are retained in the reactor longer than the aqueous phase of the slurry.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: November 27, 2012
    Assignee: Iogen Energy Corporation
    Inventors: Jeffrey Tolan, Theresa White, John Tomashek
  • Patent number: 8202709
    Abstract: A process for the enzymatic hydrolysis of cellulose to produce a hydrolysis product comprising glucose from a pretreated lignocellulosic feedstock and enzymes for use in the process are provided. The process comprises partially hydrolyzing an aqueous slurry of a pretreated lignocellulosic feedstock with cellulase enzymes, one or more than one ?-glucosidase enzyme and a binding agent for binding the ?-glucosidase enzyme to fiber solids present in the aqueous slurry. The unhydrolyzed fiber solids are then separated from the hydrolyzed slurry. The separated fiber solids thus obtained are then re-suspended in an aqueous solution to produce a re-suspended slurry. The hydrolysis is then continued to produce the hydrolysis product comprising glucose.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: June 19, 2012
    Assignee: Iogen Energy Corporation
    Inventors: Jeffrey Tolan, Theresa White, John Tomashek
  • Publication number: 20100068768
    Abstract: A process for the enzymatic hydrolysis of cellulose to produce a hydrolysis product comprising glucose from a pretreated lignocellulosic feedstock and enzymes for use in the process are provided. The process comprises partially hydrolyzing an aqueous slurry of a pretreated lignocellulosic feedstock with cellulase enzymes, one or more than one ?-glucosidase enzyme and a binding agent for binding the ?-glucosidase enzyme to fiber solids present in the aqueous slurry. The unhydrolyzed fiber solids are then separated from the hydrolyzed slurry. The separated fiber solids thus obtained are then re-suspended in an aqueous solution to produce a re-suspended slurry. The hydrolysis is then continued to produce the hydrolysis product comprising glucose.
    Type: Application
    Filed: June 22, 2007
    Publication date: March 18, 2010
    Applicant: IOGEN ENERGY CORPORATION
    Inventors: Jeffrey Tolan, Theresa White, John Tomashek
  • Publication number: 20090209009
    Abstract: A process for the enzymatic hydrolysis of cellulose to produce a hydrolysis product comprising glucose from a pretreated lignocellulosic feedstock and enzymes for use in the process are provided. The process comprises hydrolyzing an aqueous slurry of a pretreated lignocellulosic feedstock with cellulase enzymes, one or more than one ?-glucosidase enzyme and a binding agent for binding the ?-glucosidase enzyme to fiber solids present in the aqueous slurry. During the hydrolysis, both the cellulase enzyme and ?-glucosidase enzyme bind to the fiber solids. The hydrolysis is performed in a solids-retaining hydrolysis reactor so that unhydrolyzed fiber solids and bound enzyme are retained in the reactor longer than the aqueous phase of the slurry.
    Type: Application
    Filed: June 22, 2007
    Publication date: August 20, 2009
    Applicant: IOGEN ENERGY CORPORATION
    Inventors: Jeffrey Tolan, Theresa White, John Tomashek
  • Publication number: 20090111155
    Abstract: A modified Family 11 xylanase enzyme comprising a sequence that introduces a functional consensus glycosylation site is provided. Non-limiting examples of introduced glycosylation sites include mutation of the amino acid at position 34, 131, 180, 182, or a combination thereof, to an asparagine. The indicated amino acid position in the Family 11 xylanase is determined from sequence alignment of the xylanase of interest with that of a Trichoderma reesei xylanase II amino acid sequence. The introduced consensus glycosylation site facilitates increased expression efficiency of the modified xylanase when compared to the expression efficiency of a corresponding xylanase from which the modified xylanase was derived, using similar host strains and growth conditions.
    Type: Application
    Filed: November 7, 2008
    Publication date: April 30, 2009
    Applicant: IOGEN BIO-PRODUCTS CORPORATION
    Inventors: Theresa White, Genevieve R. Giroux, Katie E.A. Wallace
  • Patent number: 7456005
    Abstract: A modified Family 11 xylanase enzyme comprising a sequence that introduces a functional consensus glycosylation site is provided. Non-limiting examples of introduced glycosylation sites include mutation of the amino acid at position 34, 131, 180, 182, or a combination thereof, to an asparagine. The indicated amino acid position in the Family 11 xylanase is determined from sequence alignment of the xylanase of interest with that of a Trichoderma reesei xylanase II amino acid sequence. The introduced consensus glycosylation site facilitates increased expression efficiency of the modified xylanase when compared to the expression efficiency of a corresponding xylanase from which the modified xylanase was derived, using similar host strains and growth conditions.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: November 25, 2008
    Assignee: Iogen Bio-Products Corporation
    Inventors: Theresa White, Genevieve R. Giroux, Katie E. A. Wallace
  • Publication number: 20080076152
    Abstract: A modified Family 6 cellulase enzyme comprising a proline residue at position 413 is provided. Genetic constructs and genetically modified microbes comprising DNA sequences encoding the modified Family 6 cellulase are also provided. Family 6 cellulases of the invention display improved thermostability, thermophilicity, alkalophilicity, or a combination thereof, relative to the parent Family 6 cellulases. Such cellulases find use in a variety of applications in industry that require cellulase stability and activities at temperatures, pH values, or both, above that of the native enzyme.
    Type: Application
    Filed: August 29, 2007
    Publication date: March 27, 2008
    Applicant: IOGEN ENERGY CORPORATION
    Inventors: Patrick St-Pierre, Nabil Masri, Marie-Christine Fournier, Theresa White
  • Publication number: 20060008885
    Abstract: The present invention pertains to a method of converting cellulose to glucose by treating a pretreated lignocellulosic substrate with an enzyme mixture comprising cellulase enzyme and endoglucanase core proteins, wherein the endoglucanase core proteins are present in the enzyme mixture at an amount relative to all endoglucanases from about 35 wt. % to about 100 wt. % and wherein the endoglucanase cellulase enzymes are present in the enzyme mixture at an amount relative to the amount of CBH and EG enzymes from about 2 wt. % to about 50 wt. %. The pretreated lignocellulosic substrate is selected from the group consisting of agricultural residues, residues after starch or sugar removal, dedicated ethanol crops, forestry products, and pulp and paper products, or combinations thereof.
    Type: Application
    Filed: March 5, 2003
    Publication date: January 12, 2006
    Inventors: Daphne Wahnon, Theresa White, Jennifer Donaldson, Jeffrey Tolan
  • Publication number: 20050214410
    Abstract: A modified Family 11 xylanase enzyme comprising a sequence that introduces a functional consensus glycosylation site is provided. Non-limiting examples of introduced glycosylation sites include mutation of the amino acid at position 34, 131, 180, 182, or a combination thereof, to an asparagine. The indicated amino acid position in the Family 11 xylanase is determined from sequence alignment of the xylanase of interest with that of a Trichoderma reesei xylanase II amino acid sequence. The introduced consensus glycosylation site facilitates increased expression efficiency of the modified xylanase when compared to the expression efficiency of a corresponding xylanase from which the modified xylanase was derived, using similar host strains and growth conditions.
    Type: Application
    Filed: March 25, 2005
    Publication date: September 29, 2005
    Inventors: Theresa White, Genevieve Giroux, Katie Wallace
  • Patent number: 6442647
    Abstract: The invention enables reduction of latency time for receipt of data which has been requested from a disk system. The method enables use of a read command which enables a cache memory output to occur only when the read command has been completed. The method of the invention initially receives a read request from a host processor for a number of data blocks on a disk track (referred to as requested blocks), the requested blocks being a subset of blocks stored in the disk track. If the requested blocks are not already stored in a cache memory, the method constructs at least a first command to transfer the track to cache memory, the first command enabling identification of a last data block of the requested blocks. A second command is also prepared to transfer the track to cache memory, the second command enabling identification of the last block of the remaining set of blocks in the track.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: August 27, 2002
    Assignee: International Business Machines Corporation
    Inventors: Robert Louis Morton, John Richard Paveza, Emily Theresa White, Shu-Ling Cathy Win
  • Patent number: 5916799
    Abstract: During the enzymatic "stone washing" of a denim fabric and/or garments, an undesirable redeposition of blue dye often occurs on the surfaces of the denim. The invention relates to a means of overcoming this problem using an enzyme composition comprised of Trichoderma endoglucanases and Trichoderma cellobiohydrolases that has been partially digested by a protease enzyme to separate its core and binding domains. The use of this composition reduces the redeposition of the blue dye and hence improves the stone washing process relative to using a redepositing or backstaining cellulase.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: June 29, 1999
    Assignee: Iogen Corporation
    Inventors: Brian Foody, Colin Nicholson, Jeffrey Tolan, Theresa White
  • Patent number: 5700686
    Abstract: During the enzymatic "stone washing" of a denim fabric and/or garments, an undesirable redeposition of blue dye often occurs on the surfaces of the denim. The invention relates to a means of overcoming this problem using an enzyme composition comprised of Trichoderma endoglucanase and Trichoderma cellobiohydrolase that has been partially digested by a protease enzyme to separate its core and binding domains. The use of this composition reduces the redeposition of the blue dye and hence improves the stone washing process relative to using a redepositing or backstaining cellulase.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 23, 1997
    Assignee: Iogen Corporation
    Inventors: Brian Foody, Colin Nicholson, Jeffrey Tolan, Theresa White