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).
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Patent number: 8440886Abstract: 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: GrantFiled: June 13, 2005Date of Patent: May 14, 2013Assignee: Monsanto Technology LLCInventors: Ronald C. Lundquist, David A. Walters
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Patent number: 7705215Abstract: 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: GrantFiled: August 25, 1993Date of Patent: April 27, 2010Assignee: Dekalb Genetics CorporationInventors: 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
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Patent number: 7615685Abstract: 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: GrantFiled: August 9, 2006Date of Patent: November 10, 2009Assignee: Dekalb Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
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Patent number: 7478092Abstract: 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: GrantFiled: July 21, 2005Date of Patent: January 13, 2009Assignee: International Business Machines CorporationInventors: Kara C. Warburton, Arendse Bernth, Michael C. McCord, David A. Walters
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Patent number: 7211713Abstract: 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: GrantFiled: August 16, 2004Date of Patent: May 1, 2007Assignee: DeKalb Genetics CorporationInventors: Ronald C. Lundouist, David A. Walters, Julie A. Kirihara
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Patent number: 7064248Abstract: 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: GrantFiled: March 27, 2001Date of Patent: June 20, 2006Assignee: DeKalb Genetics Corp.Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
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Patent number: 6946587Abstract: 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: GrantFiled: July 10, 1996Date of Patent: September 20, 2005Assignee: DeKalb Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters
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Patent number: 6803499Abstract: 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: GrantFiled: May 7, 1997Date of Patent: October 12, 2004Assignee: DeKalb Genetics CorporationInventors: 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
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Patent number: 6777589Abstract: 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: GrantFiled: May 15, 1995Date of Patent: August 17, 2004Assignee: DeKalb Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters
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Patent number: 6750379Abstract: 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: GrantFiled: March 7, 2001Date of Patent: June 15, 2004Assignee: DeKalb Genetics CorporationInventors: David McElroy, David A. Walters, Larry A. Gilbertson
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Patent number: 6580019Abstract: 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: GrantFiled: March 9, 2000Date of Patent: June 17, 2003Assignee: DEKALB Genetics CorporationInventors: David McElroy, David A. Walters
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Publication number: 20030070189Abstract: 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: ApplicationFiled: March 18, 2002Publication date: April 10, 2003Applicant: DEKALB GENETICS CORPORATIONInventors: Ronald C. Lundquist, David A. Walters
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Patent number: 6399861Abstract: 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: GrantFiled: May 23, 1995Date of Patent: June 4, 2002Assignee: 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
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Publication number: 20010056583Abstract: 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: ApplicationFiled: March 7, 2001Publication date: December 27, 2001Inventors: David McElroy, David A. Walters, Larry A. Gilbertson
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Patent number: 6331665Abstract: 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: GrantFiled: March 20, 1996Date of Patent: December 18, 2001Assignee: DeKalb Genetics Corp.Inventors: Ronald C. Lundquist, David A. Walters
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Patent number: 6329574Abstract: 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: GrantFiled: July 24, 1998Date of Patent: December 11, 2001Assignee: Dekalb Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
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Publication number: 20010032344Abstract: 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: ApplicationFiled: March 27, 2001Publication date: October 18, 2001Applicant: DEKALB Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
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Patent number: 6160208Abstract: 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: GrantFiled: March 20, 1996Date of Patent: December 12, 2000Assignee: DeKalb Genetics Corp.Inventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara
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Patent number: 6025545Abstract: 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: GrantFiled: May 15, 1995Date of Patent: February 15, 2000Assignee: Dekalb Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters, T. Michael Spencer, Catherine J. Mackey
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Patent number: H2074Abstract: 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: GrantFiled: July 12, 1996Date of Patent: July 1, 2003Assignee: DeKalb Genetics CorporationInventors: Ronald C. Lundquist, David A. Walters, Julie A. Kirihara