Patents by Inventor Christopher John Pearson

Christopher John Pearson 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).

  • Derivatives of N-phenylpyrazoles
    Patent number: 6372774
    Abstract: N-Phenylpyrazole derivatives of the formula: wherein R1 represents optionally halogenated alkyl; R2 represents halogen, cyano, nitro, cycloalkyl, alkenyl, thiocyanato, optionally alkyl substituted sulphamoyl, optionally alkyl substituted carbamoyl, alkoxycarbonyl, alkanoyl or optionally halogenated alkyl; and R3 represents a hydrogen atom or a group N″R′″ or a variety of other groupings. These compounds possess arthropodicidal, plant nematocidal, anthelmintic and anti-protozoal properties; their preparation, compositions containing them and their use are described.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: April 16, 2002
    Assignee: Rhone-Poulenc Agriculture Ltd.
    Inventors: Leslie Roy Hatton, Ian George Buntain, David William Hawkins, Edgar William Parnell, Christopher John Pearson, David Alan Roberts
  • Derivatives of N-phenylpyrazoles
    Patent number: 5916618
    Abstract: N-Phenylpyrazole derivatives of the formula: ##STR1## wherein R.sup.1 represents cyano, nitro, halogen, acetyl or formyl; R.sup.2 represents R.sup.5 SO.sub.2, R.sup.5 SO or R.sup.5 S in which R.sup.5 is optionally halogen substituted alkyl, alkenyl or alkynyl;R.sup.3 represents a hydrogen atom or a group NR.sup.6 R.sup.7 wherein R.sup.6 and R.sup.7 each represent hydrogen, alkyl, alkenylalkyl, alkynylalkyl, formyl, optionally halogen substituted alkanoyl, optionally halogen substituted alkoxycarbonyl, or alkoxymethyleneamino, halogen, or R.sup.6 and R.sup.7 together form a cyclic imide and R.sup.4 represents a substituted phenyl group possess arthropodicidal, plant nematocidal, anthelmintic and anti-protozoal properties; their preparation, compositions containing them and their use are described.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: June 29, 1999
    Assignee: Rhone-Poulenc Agriculture Ltd.
    Inventors: Leslie Roy Hatton, Ian George Buntain, David William Hawkins, Edgar William Parnell, Christopher John Pearson, David Alan Roberts
  • Derivatives of N-phenylpyrazoles
    Patent number: 5714191
    Abstract: N-Phenylpyrazole derivatives of the formula: ##STR1## wherein R.sup.1 represents cyano, nitro, halogen, acetyl or formyl; R.sup.2 represents R.sup.5 SO.sub.2, R.sup.5 SO or R.sup.5 S in which R.sup.5 is optionally halogen substituted alkyl, alkenyl or alkynyl;R.sup.3 represents a hydrogen atom or a group NR.sup.6 R.sup.7 wherein R.sup.6 and R.sup.7 each represent hydrogen, alkyl, alkenylalkyl, alkynylalkyl, formyl, optionally halogen substituted alkanoyl, optionally halogen substituted alkoxycarbonyl, or alkoxymethyleneamino, halogen, or R.sup.6 and R.sup.7 together form a cyclic imide and R.sup.4 represents a substituted phenyl group possess arthropodicidal, plant nematocidal, anthelmintic and anti-protozoal properties; their preparation, compositions containing them and their use are described.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: February 3, 1998
    Assignee: Rhone-Poulenc Agriculture Ltd.
    Inventors: Leslie Roy Hatton, Ian George Buntain, David William Hawkins, Edgar William Parnell, Christopher John Pearson, David Alan Roberts