Patents by Inventor David J. Ellar

David J. Ellar 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).

  • Gene coding for insecticidal crystal protein
    Patent number: 4918006
    Abstract: Recombinant plasmids containing the larvicidal delta-endotoxin gene were constructed by inserting HindIII fragments of the Bacillus thuringiensis var. israelensis 72-75 Md plasmid into the Escherichia coli vector pUC12. Two recombinants producing a 27-kdal toxin (pIP173 and pIP174) were indentified by screening clones in an E. coli in vitro transcription-translation system. Both recombinants comprised pUC12 and common 9.7 kb HindIII fragment of the B. thuringiensis plasmid. The 27,340 Da polypeptide synthesized in vito from pIP174 transformed into E. coli JM101 and from B. subtilis 168 and spoOJ87 containing the 1.2 kb TaqI fragment from pIP173 was lethal to mosquito larvae.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: April 17, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David J. Ellar, Elizabeth S. Ward
  • Toxin-encoding nucleic acid fragments derived from a Bacillus thuringiensis subsp. israelensis gene
    Patent number: H875
    Abstract: Novel nucleic acid fragments coding for insecticidal proteins, the insecticidal proteins encoded thereby, insecticidal compositions containing such proteins, and the use of these proteins in combatting insects, particularly mosquitoes, are described. Chimeric genes containing the novel nucleic acid fragments, and microorganisms, tissues, seeds, and plants incorporating the nucleic acid fragments are also discussed.
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: January 1, 1991
    Assignee: E. I. Du Pont de Nemours and Company, Inc.
    Inventors: David J. Ellar, Elizabeth S. Ward