Patents Assigned to Thompson-Hayward Chemical Company
  • Method of reducing infestation of citrus rust mites on citrus trees
    Patent number: 4243680
    Abstract: A method of reducing the population of the citrus rust mite on citrus trees by treating the trees with such substituted benzoyl phenyl ureas asN-(2,6-difluorobenzoyl)-N'-(3-fluoro-4-chloro-phenyl) urea andN-(2,6-difluorobenzoyl)-N'-(4-chloro-phenyl) urea.
    Type: Grant
    Filed: February 7, 1979
    Date of Patent: January 6, 1981
    Assignee: Thompson-Hayward Chemical Company
    Inventor: James L. Taylor
  • Synthesis of 2,6-disubstituted benzonitriles
    Patent number: 4235807
    Abstract: A one step method of converting 2,6-disubstituted benzaldehydes to 2,6-disubstituted benzonitriles which comprises heating benzaldehyde in the presence of a hydroxylamine and a dehydrating agent for about 1 to 40 hours at a temperature of 110.degree.-250.degree. and then separating out the resultant 2,6-disubstituted benzonitrile.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: November 25, 1980
    Assignee: Thompson-Hayward Chemical Company
    Inventor: Donald W. Fuhlhage