Patents Represented by Attorney William H. Calnan, IV

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  • Meta-(phenylalkoxy)phenyl-N-methoxy-N-methylurea compounds, methods for preparing same and herbicidal use thereof
    Patent number: 4490165
    Abstract: There are provided certain substituted phenylalkoxyphenylurea compounds, methods for the preparation thereof, and methods for the selective control of dicotyledonous and certain monocotyledonous plants in the presence of agronomic crops.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: December 25, 1984
    Assignee: American Cyanamid Company
    Inventors: David M. Spatz, Barrington Cross
  • Polysubstituted butanoic acids, esters and derivatives thereof utilizing the same as herbicides
    Patent number: 4313754
    Abstract: There are provided polysubstituted butanoic acids, esters and derivatives thereof, methods for preparing the same and herbicidal compositions employing said polysubstituted butanoic acids, esters and derivatives.
    Type: Grant
    Filed: January 28, 1980
    Date of Patent: February 2, 1982
    Assignee: American Cyanamid Company
    Inventor: Stephen S. Szucs
  • Meta-(phenylalkoxy)phenyl-N-methoxy-N-methylurea compounds
    Patent number: 4308213
    Abstract: There are provided certain substituted phenylalkoxy-phenylurea compounds, methods for the preparation thereof, and methods for the selective control of dicotyledonous and certain monocotyledonous plants in the presence of agronomic crops.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: December 29, 1981
    Assignee: American Cyanamid Company
    Inventors: David M. Spatz, Barrington Cross