Patents Assigned to DuPont TopCross International, Inc.
  • Patent number: 5763756
    Abstract: A synthetic hybrid corn plant having the designation LP41, produced by crossing two proprietary Pfister Hybrid Corn Company maize synthetics, LP41A-Reid and LP41B-Lancaster. LP41 has the unique property of imparting high oil and high protein levels in the grain of certain normal and male sterile hybrids when used as a pollinator. LP41 is characterized by excellent cold tolerant seedling vigor for rapid emergence in cold soils, and excellent early-season adaptability to nick with early maize hybrids that condition fast dry-down and superior grain quality in the recipient female grain parent. This invention thus relates to the synthetic hybrid plants and seeds of LP41, i.e., the synthetic hybrid produced by crossing the two aforementioned parental synthetics and the seed thereof, including advanced generation seed, variants, mutants, and modifications of LP41.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: June 9, 1998
    Assignees: E.I. Du Pont de Nemours and Company, DuPont TopCross International, Inc.
    Inventor: Richard R. Bergquist
  • Patent number: 5706603
    Abstract: A novel method of producing corn grain with enhanced quality traits including high oil content has been developed. Through pollination of male-sterile hybrid corn plants by nonisogenic corn plants possessing genes which control the expression of enhanced quality grain traits, grain is obtained possessing such traits much higher than would be expected for self- or cross-pollination. This method can be practiced by farmers using currently accepted farming practices to directly obtain high yields of high-oil corn grain, high-protein corn grain, and other valuable grain for animal feed and other products.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: January 13, 1998
    Assignees: E. I. Du Pont de Nemours and Company, Dupont TopCross International, Inc.
    Inventors: Richard Robert Bergquist, Douglas Stuart Nubel, Donald L. Thompson
  • Patent number: 5704160
    Abstract: A novel method of producing corn grain with a high oil content has been developed. Through pollination of male-sterile hybrid corn plants by nonisogenic corn plants possessing the trait of high-oil, grain is obtained possessing an oil content much higher than would be expected for self- or cross-pollination. This method can be practiced by farmers using currently accepted farming practices to directly obtain high yields of high-oil corn grain for animal feed and other products.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: January 6, 1998
    Assignees: E. I. Du Pont de Nemours and Company, DuPont TopCross International, Inc.
    Inventors: Richard Robert Bergquist, Douglas Stuart Nubel, Donald L. Thompson