Patents by Inventor John Schoper

John Schoper 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).

  • Seed vigor by pre-harvest defoliation of maize plants
    Patent number: 6162974
    Abstract: An increase in the quality of maize seed, especially with respect to improved seed vigor, is achieved by defoliating maize plants during a specific period after pollination. A maize seed assemblage then is obtained that is characterized by an enhanced seed vigor.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: December 19, 2000
    Assignee: Pioneer Hi-Bred International
    Inventors: Barry Martin, John Schoper, Laurie Carrigan
  • Seed vigor by pre-harvest defoliation of maize plants
    Patent number: 5518989
    Abstract: An increase in the quality of maize seed, especially with respect to improved seed vigor, is achieved by defoliating maize plants during a specific period after pollination. A maize seed assemblage then is obtained that is characterized by an enhanced seed vigor.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: May 21, 1996
    Assignee: Pioneer Hi-Bred International
    Inventors: Barry Martin, John Schoper, Laurie Carrigan