Patents by Inventor David A. Walters

David A. Walters 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: 8440886
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express heterologous DNA which is heritable are disclosed along with a process for producing said plants. The process comprises the microjectile bombardment of friable embryogenic callus from the plant to be transformed. The process may be applicable to other graminaceous cereal plants which have not proven stably transformable by other techniques.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: May 14, 2013
    Assignee: Monsanto Technology LLC
    Inventors: Ronald C. Lundquist, David A. Walters
  • Patent number: 7705215
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: April 27, 2010
    Assignee: Dekalb Genetics Corporation
    Inventors: Thomas R. Adams, Paul C. Anderson, Sheryl A. Chambers, Paul S. Chomet, Richard J. Daines, Christopher E. Flick, Kimberly Glassman, William J. Gordon-Kamm, Albert P. Kausch, Lucille B. Laccetti, Peggy G. Lemaux, Catherine J. Mackey, Mary Lou Mangano, Michael T. Mann, James V. O'Brien, Emil M. Orozco, Peter Orr, Thomas B. Rice, T. Michael Spencer, William G. Start, Michael A. Stephens, Clayton S. Vetsch, David A. Walters, Donald S. Walters, Nancy G. Willetts, Susan J. Zachwieja
  • Patent number: 7615685
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs an EPSP synthase gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide glyphosate. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen. This invention also relates to methods of producing human or animal food from the transformed maize plants.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: November 10, 2009
    Assignee: Dekalb Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
  • Patent number: 7478092
    Abstract: An improved solution for extracting and identifying key terms in content is provided. In the solution, one or more documents can be obtained and one or more candidate terms can be obtained from the content of each document. Subsequently, one or more exclusion conditions can be used to filter the candidate terms thereby generating a set of key terms. In particular, all common terms and/or all near duplicate candidate terms can be excluded from the set of key terms. The set of key terms can be used in translating the content, generating a glossary/index for the content, detecting and/or correcting incorrect terms and usages of terms in the content, building a terminology repository, and/or the like. In one embodiment, the key term extraction is performed to facilitate the translation of product documentation into a second language in order to release the product in one or more nations.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: January 13, 2009
    Assignee: International Business Machines Corporation
    Inventors: Kara C. Warburton, Arendse Bernth, Michael C. McCord, David A. Walters
  • Patent number: 7211713
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: May 1, 2007
    Assignee: DeKalb Genetics Corporation
    Inventors: Ronald C. Lundouist, David A. Walters, Julie A. Kirihara
  • Patent number: 7064248
    Abstract: A method of preparing fertile transgenic Zea mays (corn) plants which stably express DNA encoding a Bacillus thuringiensis endotoxin, so as to impart insect resistance to the fertile transgenic plants is taught. The method comprises bombarding regenerable corn cells with DNA-coated microprojectiles, wherein the DNA is adjusted to be more efficiently expressed in corn than the native B. thuringiensis sequence, and regenerating a fertile transgenic plants from the transformed cells.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: June 20, 2006
    Assignee: DeKalb Genetics Corp.
    Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
  • Patent number: 6946587
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express heterologous DNA which is heritable are disclosed along with a process for producing said plants. The process comprises the microjectile bombardment of friable embryogenic callus from the plant to be transformed. The process may be applicable to other graminceous cereal plants which have not proven stably transformable by other techniques.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: September 20, 2005
    Assignee: DeKalb Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters
  • Patent number: 6803499
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: October 12, 2004
    Assignee: DeKalb Genetics Corporation
    Inventors: Paul C. Anderson, Christopher E. Flick, William J. Gordon-Kamm, Albert P. Kausch, Catherine J. Mackey, Emil M. Orozco, Peter Orr, Michael A. Stephens, David A. Walters, Donald S. Walters
  • Patent number: 6777589
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stablefs transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: August 17, 2004
    Assignee: DeKalb Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters
  • Patent number: 6750379
    Abstract: The invention provides a process to prepare a recombined transgenic Zea mays plant from a transgenic Zea mays plant, wherein the transgene in the recombinant plant has an altered genetic structure relative to the genetic structure of the transgene in the transgenic plant, due to homologous recombination-mediated transgene deletion, amplification or rearrangement.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: June 15, 2004
    Assignee: DeKalb Genetics Corporation
    Inventors: David McElroy, David A. Walters, Larry A. Gilbertson
  • Patent number: 6580019
    Abstract: The invention provides a process to prepare a recombined transgenic Zea mays plant from a transgenic Zea mays plant, wherein the transgene in the recombinant plant has an altered genetic structure relative to the genetic structure of the transgene in the transgenic plant, due to recombination-mediated transgene deletion.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: June 17, 2003
    Assignee: DEKALB Genetics Corporation
    Inventors: David McElroy, David A. Walters
  • Publication number: 20030070189
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express heterologous DNA which is heritable are disclosed along with a process for producing said plants. The process comprises the microjectile bombardment of friable embryogenic callus from the plant to be transformed. The process may be applicable to other graminaceous cereal plants which have not proven stably transformable by other techniques.
    Type: Application
    Filed: March 18, 2002
    Publication date: April 10, 2003
    Applicant: DEKALB GENETICS CORPORATION
    Inventors: Ronald C. Lundquist, David A. Walters
  • Patent number: 6399861
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stable transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: June 4, 2002
    Assignee: Dekalb Genetics Corp.
    Inventors: Paul C. Anderson, Christopher E. Flick, William J. Gordon-Kamm, Albert P. Kausch, Catherine J. Mackey, Emil M. Orozco, Peter Orr, Michael A. Stephens, David A. Walters, Donald S. Walters
  • Publication number: 20010056583
    Abstract: The invention provides a process to prepare a recombined transgenic Zea mays plant from a transgenic Zea mays plant, wherein the transgene in the recombinant plant has an altered genetic structure relative to the genetic structure of the transgene in the transgenic plant, due to homologous recombination-mediated transgene deletion, amplification or rearrangement.
    Type: Application
    Filed: March 7, 2001
    Publication date: December 27, 2001
    Inventors: David McElroy, David A. Walters, Larry A. Gilbertson
  • Patent number: 6331665
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express recombinant DNA which is heritable are provided wherein said DNA preferably comprises a recombinant gene which encodes a seed storage protein, so that the amino acid profile of the corn is improved.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: December 18, 2001
    Assignee: DeKalb Genetics Corp.
    Inventors: Ronald C. Lundquist, David A. Walters
  • Patent number: 6329574
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stablefs transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: December 11, 2001
    Assignee: Dekalb Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
  • Publication number: 20010032344
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express recombinant DNA which is heritable are provided wherein said DNA preferably comprises a recombinant gene which encodes a seed storage protein, so that the amino acid profile of the corn is improved.
    Type: Application
    Filed: March 27, 2001
    Publication date: October 18, 2001
    Applicant: DEKALB Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
  • Patent number: 6160208
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express recombinant DNA which is heritable are provided wherein said DNA preferably comprises a recombinant gene which encodes a seed storage protein, so that the amino acid profile of the corn is improved.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: December 12, 2000
    Assignee: DeKalb Genetics Corp.
    Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
  • Patent number: 6025545
    Abstract: This invention relates to a reproducible system for the production of stable, genetically transformed maize cells, and to methods of selecting cells that have been transformed. One method of selection disclosed employs the Streptomyces bar gene introduced by microprojectile bombardment into embryogenic maize cells which were grown in suspension cultures, followed by exposure to the herbicide bialaphos. The methods of achieving stables transformation disclosed herein include tissue culture methods and media, methods for the bombardment of recipient cells with the desired transforming DNA, and methods of growing fertile plants from the transformed cells. This invention also relates to the transformed cells and seeds and to the fertile plants grown from the transformed cells and to their pollen.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: February 15, 2000
    Assignee: Dekalb Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters, T. Michael Spencer, Catherine J. Mackey
  • Patent number: H2074
    Abstract: Fertile transgenic Zea mays (corn) plants which stably express recombinant DNA which is heritable are provided wherein said DNA preferably comprises a recombinant gene which encodes a seed storage protein, so that the amino acid profile of the corn is improved.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 1, 2003
    Assignee: DeKalb Genetics Corporation
    Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara