Patents Examined by W. Murray Spruill
  • Herbicide resistant tobacco
    Patent number: 4757011
    Abstract: Tobacco varieties exhibiting agronomically useful resistance to N-(heterocyclicaminocarbonyl)arylsulfonamide herbicides are produced by tissue culture selection techniques.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: July 12, 1988
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Roy S. Chaleff, Thomas B. Ray