Patents by Inventor David L. Hallahan

David L. Hallahan 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).

  • Publication number: 20200359619
    Abstract: Entomopathogenic fungal strains, entomopathogenic fungal compositions, entomopathogenic fungal propagules, and methods of processing to compositions stably encapsulating entomopathogenic fungal propagules.
    Type: Application
    Filed: January 11, 2019
    Publication date: November 19, 2020
    Applicant: PIONEER HI-BRED INTERNATIONAL, INC.
    Inventor: DAVID L HALLAHAN
  • Publication number: 20170042104
    Abstract: The present disclosure provides a method for propagating a crop using meristem excision, micropropagation, plantlet formation, plantlet singulation, plantlet transfer to artificial seeds, and planting artificial seeds. Methods are provided for producing and handling the plantlets and materials used to form artificial seeds. The artificial seeds may be used to store plantlets or may be planted to form a crop.
    Type: Application
    Filed: April 23, 2015
    Publication date: February 16, 2017
    Inventors: Timothy Casper, Charles Philip Defelice, David L. Hallahan, Bruno Ieiri Ito, Sharon Jo Keeler, Katrina Kratz, Markus Michael Liedgens, Brian D. Mather, Scott Meadows, Marcos Luciano Nunhez, Joseph Anthony Perrotto, Eduardo Da Cruz Maduro Picelli, Laudenir Maria Prioli, James John Ragghianti, Christopher C. Whitcombe
  • Publication number: 20160183432
    Abstract: A new and distinct hardy perennial Catmint plant, Nepeta “Thaya” characterized at least by high oil yield.
    Type: Application
    Filed: December 22, 2014
    Publication date: June 23, 2016
    Inventors: Thaya Silke Ganzke, David L. Hallahan
  • Publication number: 20150252286
    Abstract: A high yielding method is described for improved isolation of catmint oil after recovery from catmint plants of the genus Nepeta. Catmint oil can be obtained in quantitative yields for use in insect repellent compositions.
    Type: Application
    Filed: May 22, 2015
    Publication date: September 10, 2015
    Inventors: MARK A. SCIALDONE, DAVID L. HALLAHAN
  • Patent number: 9085747
    Abstract: A high yielding method is described for recovery of catmint oil from catmint plants of the genus Nepeta by improved separation of a catmint oil containing phase from the condensed steam distillate of catmint plants. Catmint oil may be obtained in quantitative yields for use in insect repellent compositions.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: July 21, 2015
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark A. Scialdone, David L. Hallahan
  • Patent number: 8633325
    Abstract: Dihydronepetalactone, a minor natural constituent of the essential oil of catmints (Nepeta spp.) such as Nepeta cataria, has been identified as an effective insect repellent compound. Synthesis of dihydronepetalactone may be achieved by hydrogenation of nepetalactone, the major constituent of catmint essential oils. This compound, which also has fragrance properties, may be used commercially for its insect repellent properties, and methods for making an composition thereof are disclosed.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: January 21, 2014
    Assignee: E I du Pont de Nemours and Company
    Inventors: David L. Hallahan, Leo Ernest Manzer
  • Publication number: 20120238768
    Abstract: A high yielding method is described for recovery of catmint oil from catmint plants of the genus Nepeta by improved separation of a catmint oil containing phase from the condensed steam distillate of catmint plants. Catmint oil may be obtained in quantitative yields for use in insect repellent compositions.
    Type: Application
    Filed: November 10, 2010
    Publication date: September 20, 2012
    Applicant: E.I.DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark A. Scialdone, David L. Hallahan
  • Patent number: 7880058
    Abstract: This invention pertains to nucleic acid fragments encoding plant proteins that are homologs to the cis-prenyltransferases UPP synthase from the bacterium Micrococcus luteus or Dedol-PP synthase from yeast Saccharomyces cerevisiae. More specifically, this invention pertains to cis-prenyltransferase homologs from wheat, grape, soybean, rice, African daisy, rubber tree latex and pot marigold.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: February 1, 2011
    Assignee: Pioneer Hi-Bred International, Inc.
    Inventors: David L Hallahan, Christopher Coldren, Dennis Flint, Hong Wang
  • Publication number: 20100034754
    Abstract: Dihydronepetalactone, a minor natural constituent of the essential oil of catmints (Nepeta spp.) such as Nepeta cataria, has been identified as an effective insect repellent compound. Synthesis of dihydronepetalactone may be achieved by hydrogenation of nepetalactone, the major constituent of catmint essential oils. This compound, which also has fragrance properties, may be used commercially for its insect repellent properties, and methods for making an composition thereof are disclosed.
    Type: Application
    Filed: June 8, 2009
    Publication date: February 11, 2010
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David L. Hallahan, Leo Ernest Manzer
  • Publication number: 20090288226
    Abstract: This invention pertains to a method for manipulating the growth rate and/or yield and/or architecture of a genetically modified plant, as compared to a corresponding wild-type plant. The method relies on over-expression of an endogenous or exogenous gene encoding a cis-prenyltransferase enzyme. In a preferred embodiment, transgenic plants obtained by this method exhibit increased growth rates to maturity, increased seed production, and increased height, siliques, and leave area.
    Type: Application
    Filed: November 21, 2005
    Publication date: November 19, 2009
    Inventors: David L. Hallahan, Natalie M. Keiper-Hrynko
  • Patent number: 7547793
    Abstract: Dihydronepetalactone, a minor natural constituent of the essential oil of catmints (Nepeta spp.) such as Nepeta cataria, has been identified as an effective insect repellent compound. Synthesis of dihydronepetalactone may be achieved by hydrogenation of nepetalactone, the major constituent of catmint essential oils. This compound, which also has fragrance properties, may be used commercially for its insect repellent properties, and methods for making an composition thereof are disclosed.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: June 16, 2009
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David L. Hallahan, Leo Ernest Manzer
  • Patent number: 7273737
    Abstract: This invention pertains to nucleic acid fragments encoding plant proteins that are homologs to the cis-prenyltransferases UPP synthase from the bacterium Micrococcus luteus or Dedol-PP synthase from yeast Saccharomyces cerevisiae. More specifically, this invention pertains to cis-prenyltransferase homologs from wheat, grape, soybean, rice, African daisy, rubber tree latex and pot marigold.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: September 25, 2007
    Assignee: Pioneer Hi-Bred International, Inc.
    Inventors: David L. Hallahan, Christopher Coldren, Dennis Flint, Hong Wang
  • Patent number: 7232844
    Abstract: Dihydronepetalactone, a minor natural constituent of the essential oil of catmints (Nepeta spp.) such as Nepeta cataria, has been identified as an effective insect repellent compound. Synthesis of dihydronepetalactone may be achieved by hydrogenation of nepetalactone, the major constituent of catmint essential oils. This compound, which also has fragrance properties, may be used commercially for its insect repellent properties.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: June 19, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: David L. Hallahan
  • Patent number: 7205456
    Abstract: This invention pertains to nucleic acid fragments encoding plant cis-prenyltransferases. More specifically, this invention pertains to a cis-prenyltransferase homolog from latex of the rubber-producing plant species Taraxacum kok-saghyz (russian dandelion) and a cis-prenyltransferase homolog from the rubber-producing plant species Helianthus annus (sunflower).
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: April 17, 2007
    Assignee: Pioneer Hi-Bred International, Inc.
    Inventors: David L. Hallahan, Natalie M. Keiper-Hrynko
  • Patent number: 6998471
    Abstract: The instant invention relates to bioproduction of isopentenyl diphosphate within the latex of the rubber tree, Hevea brasiliensis. Isopentenyl diphosphate (IPP) synthesis from acetate is mediated by a set of enzymes, acetyl-coA acetyltransferase, HMG-coA synthase, HMG-coA reductase, mevalonate kinase, phosphomevalonate kinase and mevalonate diphosphate decarboxylase, encoded by six genes isolated as expressed sequence tag (EST) cDNAs from Hevea brasiliensis latex. In addition, a variant sequence of one of these enzymes, acetyl-coA acetyltransferase, has been found.
    Type: Grant
    Filed: January 2, 2002
    Date of Patent: February 14, 2006
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: David L. Hallahan, Natalie M. Keiper-Hrynko
  • Publication number: 20040152158
    Abstract: This invention pertains to nucleic acid fragments encoding plant proteins that are homologs to the cis-prenyltransferases UPP synthase from the bacterium Micrococcus luteus or Dedol-PP synthase from yeast Saccharomyces cerevisiae. More specifically, this invention pertains to cis-prenyltransferase homologs from wheat, grape, soybean, rice, African daisy, rubber tree latex and pot marigold.
    Type: Application
    Filed: November 3, 2003
    Publication date: August 5, 2004
    Inventors: David L. Hallahan, Christopher Coldren, Dennis Flint, Hong Wang
  • Publication number: 20040127553
    Abstract: Dihydronepetalactone, a minor natural constituent of the essential oil of catmints (Nepeta spp.) such as Nepeta cataria, has been identified as an effective insect repellent compound. Synthesis of dihydronepetalactone may be achieved by hydrogenation of nepetalactone, the major constituent of catmint essential oils. This compound, which also has fragrance properties, may be used commercially for its insect repellent properties.
    Type: Application
    Filed: September 18, 2003
    Publication date: July 1, 2004
    Inventor: David L. Hallahan
  • Publication number: 20030235601
    Abstract: Dihydronepetalactone, a minor natural constituent of the essential oil of catmints (Nepeta spp.) such as Nepeta cataria, has been identified as an effective insect repellent compound. Synthesis of dihydronepetalactone may be achieved by hydrogenation of nepetalactone, the major constituent of catmint essential oils. This compound, which also has fragrance properties, may be used commercially for its insect repellent properties.
    Type: Application
    Filed: March 19, 2003
    Publication date: December 25, 2003
    Inventor: David L. Hallahan
  • Patent number: 6645747
    Abstract: This invention pertains to nucleic acid fragments encoding plant proteins that are homologs to the cis-prenyltransferases UPP synthase from the bacterium Micrococcus luteus or Dedol-PP synthase from yeast Saccharomyces cerevisiae. More specifically, this invention pertains to cis-prenyltransferase homologs from wheat, grape, soybean, rice, African daisy, rubber tree latex and pot marigold.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: November 11, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David L. Hallahan, Christopher Coldren, Dennis Flint, Hong Wang
  • Publication number: 20030191047
    Abstract: A pleasant fragrance has been identified with dihydronepetalactones, a minor natural constituent of the essential oil of catmints such as Nepeta cataria. Synthesis of dihydronepetalactones may be achieved by hydrogenation of nepetalactone, the major constituent of catmint oils. The fragrant compounds may be used commercially for their organoleptic properties.
    Type: Application
    Filed: January 23, 2003
    Publication date: October 9, 2003
    Inventor: David L. Hallahan