Patents by Inventor Richard Henry Hewett

Richard Henry Hewett 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).

  • Herbicidal compositions comprising picolinafen
    Patent number: 6660692
    Abstract: This invention provides a method for controlling the growth of weeds (i.e. undesired vegetation) at a locus which comprises applying to the locus a herbicidally effective amount of: (a) picolinfen, a phenoxypicolinamide derivative of formula (I); and (b) a partner herbicide, selected from isoxazole, dione, urea and hydroxybenzonitrile herbicide.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: December 9, 2003
    Assignee: Aventis CropScience S.A.
    Inventor: Richard Henry Hewett
  • Herbicidal compositions
    Patent number: 6046133
    Abstract: The invention relates to compositions comprising (a) a 2-cyano-1,3-dione derivative or an agriculturally acceptable salt, metal complex or enolic tautomeric form thereof; and (b) at least one member of the group consisting of a triazine herbicide, a chloroacetamide herbicide, a 2,6-dinitroaniline herbicide, aclonifen, which is 2-chloro-6-nitro-3-phenoxyaniline; diuron, which is 3-(3,4-dichlorophenyl)-1,1-dimethylurea; and a hydroxybenzonitrile herbicide; and to their use as herbicides.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: April 4, 2000
    Assignee: Rhone-Poulenc Agriculture Ltd.
    Inventors: Richard Henry Hewett, Alan Gamblin, Bernard Leroux, Sylvie Ronssin
  • Herbicidal compositions
    Patent number: 6028031
    Abstract: The invention relates to herbicidal compositions comprising:(a) a 4-benzoylisozaxole of formula I: ##STR1## wherein R, R.sup.1 and R.sup.2 are as defined in the description and (b) a chloroacetamide herbicide.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: February 22, 2000
    Assignee: Rhone-Poulenc Agriculture, Ltd.
    Inventors: Alan Gamblin, Richard Henry Hewett
  • Herbicidal compositions comprising a 4-benzoylisoxazole and a triazine herbicide
    Patent number: 5962370
    Abstract: The invention relates to compositions comprising a 4-benzoylisoxazole derivative of formula (I), wherein R, R.sup.1, R.sup.2 and n are as defined in the description, and a triazine herbicide, and their use as herbicides.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: October 5, 1999
    Assignee: Rhone-Poulenc Agriculture Ltd
    Inventors: Alan Gamblin, Vladir Cezarino, Richard Henry Hewett, Takashi Nishida, deceased
  • Herbicidal compositions
    Patent number: 5795846
    Abstract: The invention relates to herbicidal compositions comprising:(a) a 4-benzoylisozaxole of formula I: ##STR1## wherein R, R.sup.1 and R.sup.2 are as defined in the description and (b) a chloroacetamide herbicide.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: August 18, 1998
    Assignee: Rhone-Poulenc Agriculture Limited
    Inventors: Alan Gamblin, Richard Henry Hewett