Patents by Inventor Themistocles D. J. D'Silva

Themistocles D. J. D'Silva 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).

  • Processes for preparing pesticidal intermediates
    Patent number: 6258973
    Abstract: The invention relates to a process for the preparation of compounds having the formula (I) wherein W, R2, R3, R5 and R6 are as defined in the description, which are useful as intermediates in the synthesis of pesticidally active compounds.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: July 10, 2001
    Assignee: Rhone-Poulenc Agro
    Inventors: Themistocles D. J. D'Silva, Jean-Erick Ancel
  • Processes for preparing pesticidal intermediates
    Patent number: 6084105
    Abstract: The invention relates to a process for the preparation of compounds having the formula (I) ##STR1## wherein W, R.sub.2, R.sub.3, R.sub.5 and R.sub.6 are as defined in the description, which are useful as intermediates in the synthesis of pesticidally active compounds.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: July 4, 2000
    Assignee: Rhone-Poulenc Agro
    Inventors: Themistocles D. J. D'Silva, Jean-Erick Ancel
  • 1-arylpyrazoles
    Patent number: 5079370
    Abstract: The invention describes novel 3-cyano-4-sulfenylated-5-alkoxy-1-arylpyrazoles of general formula(I) ##STR1## wherein typically preferred substituents are: R is C.sub.1 to C.sub.4 alkyl fully substituted by halogen;R.sub.1 is C.sub.1 to C.sub.4 alkyl, C.sub.3 to C.sub.6 alkenyl and alkynyl or aralkyl (each of which may be optionally substituted), dialkylaminocarbonyl or a group --P(.dbd.X)(Oalkyl)(Salkyl) wherein X is oxygen or sulfur;R.sub.2, R.sub.3, R.sub.5 and R.sub.6 are each hydrogen or halogen;R.sub.4 is CF.sub.3, OCF.sub.3, SCF.sub.3, SOCF.sub.3, SO.sub.2 CF.sub.3, OCHF.sub.2, halogen or alkyl; and n is 0, 1 or 2.The invention further relates to intermediates and processes to make the compounds and to compositions thereof and to methods of control of arthopod (especially insect) nematode, helminth, and protozoan pests.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: January 7, 1992
    Assignee: Rhone-Poulenc AG Company
    Inventors: Themistocles D. J. D'Silva, Gail S. Powell, Philip R. Timmons, Richard G. Pennicard
  • 3-cyano-5-hydroxy-1-arylpyrazoles
    Patent number: 5047550
    Abstract: The invention describes novel 3-cyano-4-sulfenylated-5-alkoxy-1-arylpyrazoles of general formula(I) ##STR1## wherein typically preferred substituents are: R is C.sub.1 to C.sub.4 alkyl fully substituted by halogen;R.sub.1 is C.sub.1 to C.sub.4 alkyl, C.sub.3 to C.sub.6 alkenyl and alkynyl or aralkyl (each of which may be optionally substituted), dialkylaminocarbonyl or a group --P(.dbd.X)(Oalkyl)(Salkyl) wherein X is oxygen or sulfur;R.sub.2, R.sub.3, R.sub.5 and R.sub.6 are each hydrogen or halogen;R.sub.4 is CF.sub.3, OCF.sub.3, SCF.sub.3, SOCF.sub.3, SO.sub.2 CF.sub.3, OCHF.sub.2, halogen or alkyl; andn is 0, 1 or 2.The invention further relates to intermediates and processes to make the compounds and to compositions thereof and to methods of control of arthopod (especially insect) nematode, helminth, and protozoan pests.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: September 10, 1991
    Assignee: Rhone-Poulenc AG Co.
    Inventor: Themistocles D. J. D'Silva
  • Pesticidal 3-cyano-5-alkoxy-1-arylpyrazoles, compositions and use
    Patent number: 4918085
    Abstract: The invention describes novel 3-cyano-4-sulfenylated-5-alkoxy-1-arylpyrazoles of general formula (I) ##STR1## wherein typically preferred substituents are: R is C.sub.1 to C.sub.4 alkyl fully substituted by halogen;R.sub.1 is C.sub.1 to C.sub.4 alkyl, C.sub.3 to C.sub.6 alkenyl and alkynyl or aralkyl (each of which may be optionally substituted), dialkylaminocarbonyl or a group --P(=X)(Oalkyl)(Salkyl) wherein X is oxygen or sulfur;R.sub.2, R.sub.3, R.sub.5 and R.sub.6 are each hydrogen or halogen;R.sub.4 is CF.sub.3, OCF.sub.3, SCF.sub.3, SOCF.sub.3, SO.sub.2 CF.sub.3, OCHF.sub.2, halogen or alkyl; and n is 0, 1 or 2.The invention further relates to intermediates and processes to make the compounds and to compositions thereof and to methods of control of arthopod (especially insect) nematode, helminth, and protozoan pests.
    Type: Grant
    Filed: March 2, 1989
    Date of Patent: April 17, 1990
    Assignee: Rhone-Poulenc AG Company
    Inventors: Themistocles D. J. D'Silva, Gail S. Powell, Philip R. Timmons, Richard G. Pennicard
  • Pesticidal benzoylureidoaryl phosphate compounds
    Patent number: 4734404
    Abstract: Novel benzoylureidoaryl phosphate compounds are provided together with methods for their preparation and the use of said compounds as the active toxicant in pesticidal compositions.
    Type: Grant
    Filed: June 6, 1986
    Date of Patent: March 29, 1988
    Assignee: Rhone-Poulenc Nederland B.V.
    Inventors: Raaj Kumar, Themistocles D. J. D'Silva
  • Biocidal sulfur-containing bis-imino carbamate compounds
    Patent number: 4725682
    Abstract: Sulfur-containing bis-amino carbamate compounds exhibit outstanding acaricidal, nematocidal and insecticidal activity.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: February 16, 1988
    Assignee: Rhone-Poulenc Nederland, B.V.
    Inventor: Themistocles D. J. D'Silva
  • Insecticidal and miticidal oxime N-alkyl-N-.alpha.-haloacylcarbamate derivatives, compositions, and method of use therefor
    Patent number: 4675340
    Abstract: Pesticidal oxime N-alkyl-N-.alpha.-haloacyl-carbamates represented by the structure: ##STR1## wherein R represents an imino radical, R' and R" represent alkyl radicals and X is chlorine, fluorine or bromine.
    Type: Grant
    Filed: December 11, 1985
    Date of Patent: June 23, 1987
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • Sulfur-containing bis-imino carbamate compounds, pesticidal composition and use
    Patent number: 4657904
    Abstract: Sulfur-containing bis-amino carbamate compounds exhibit outstanding acaricidal, nematocidal and insecticidal activity.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: April 14, 1987
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • N-(alpha-haloacyl)-N-hydrocarbyl carbamoyl halides
    Patent number: 4637901
    Abstract: Novel N-(alpha-haloacyl)-N-hydrocarbyl carbamoyl halides and a process for their preparation are provided. The novel compounds are useful as intermediates in the preparation of insecticides.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: January 20, 1987
    Assignee: Union Carbide Corporation
    Inventors: Chennupati K. Rao, Sudershan K. Arora, Raman Grover, John A. Durden, Themistocles D. J. D'Silva
  • Pesticidal oxime N-alkyl-N-.alpha.-(alkylthio-phosphorothio)acyl carbamates
    Patent number: 4617295
    Abstract: Oxime N-alkyl-N-.alpha.-(alkylthio-phosphorothio)acyl carbamates represented the structure: ##STR1## wherein the R represents various imino radicals, Q is oxygen or sulfur and the numbered R groups represent various alkyl substituents, which exhibit superior insecticidal and miticidal activity.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: October 14, 1986
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • Novel pesticidal phenoxyphenyl and phenoxypyridyl benzoyl ureas and process for preparation
    Patent number: 4602109
    Abstract: Novel phenoxyphenyl and phenoxypyridyl benzoyl ureas and a process for their preparation are provided. The novel ureas are useful as the active toxicant in pesticidal compositions.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: July 22, 1986
    Assignee: Union Carbide Corporation
    Inventors: David T. Chou, John A. Durden, Themistocles D. J. D'Silva
  • Carbamate-sulfenyl-carbamoyl fluoride compounds
    Patent number: 4595769
    Abstract: Carbamate-sulfenyl-carbamoyl fluoride compounds are valuable insecticidal compositions and are also useful intermediates in the production of bis-carbamate compounds.
    Type: Grant
    Filed: April 20, 1984
    Date of Patent: June 17, 1986
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • Pesticidal oxime N-alkyl-N-.alpha.-haloacyl-carbamates
    Patent number: 4576965
    Abstract: Pesticidal oxime N-alkyl-N-.alpha.-haloacyl-carbamates represented by the structure: ##STR1## wherein R represents an imino radical, R' and R" represent alkyl radicals and X is chlorine, fluorine or bromine.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: March 18, 1986
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • Pesticidal oxime N-alkyl-N-.alpha.-(alkylthio-phosphorothio)acyl carbamates
    Patent number: 4568671
    Abstract: Oxime N-alkyl-N-.alpha.-(alkylthio-phosphorothio)acyl carbamates represented the structure: ##STR1## wherein the R represents various imino radicals, Q is oxygen or sulfur and the numbered R groups represent various alkyl substituents, which exhibit superior insecticidal and miticidal activity.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: February 4, 1986
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • Unsymmetrical bis-carbamate compounds
    Patent number: 4551472
    Abstract: Unsymmetrical N-substituted bis-carbamoyl sulfide compounds exhibit exceptional broad spectrum pesticidal activity coupled with extremely low mammalian toxicity and phytotoxicity.
    Type: Grant
    Filed: January 9, 1984
    Date of Patent: November 5, 1985
    Assignee: Union Carbide Corporation
    Inventor: Themistocles D. J. D'Silva
  • Pesticidal phenoxypyridyl benzoyl ureas
    Patent number: 4540578
    Abstract: Novel phenoxyphenyl and phenoxypyridyl benzoyl ureas and a process for their preparation are provided. The novel ureas are useful as the active toxicant in pesticidal compositions.
    Type: Grant
    Filed: December 30, 1982
    Date of Patent: September 10, 1985
    Assignee: Union Carbide Corporation
    Inventors: David T. Chou, John A. Durden, Themistocles D. J. D'Silva
  • Pesticide substituted diketonitriles
    Patent number: H1552
    Abstract: The invention relates to diketontrile derivatives which have been discovered useful against arthropods, plant nematodes, helminth protozoan pests or as intermediates for such useful compounds which have a general formula: ##STR1##
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: June 4, 1996
    Assignee: Rhone-Poulenc Inc.
    Inventors: Paul A. Cain, David T. Chou, Themistocles D. J. D'Silva, Daniel B. Gant, Nancy D. Herman
  • Pesticide substituted diketonitriles
    Patent number: H1595
    Abstract: The invention relates to diketontrile derivatives which have been discovered useful against arthropods, plant nematodes, helminth protozoan pests or as intermediates for such useful compounds which have a general formula: ##STR1##
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: September 3, 1996
    Assignee: Rhone-Poulene Inc.
    Inventors: Paul A. Cain, David T.-W. Chou, Themistocles D. J. D'Silva, Daniel B. Grant, Nancy D. Herman
  • Pesticide substituted diketonitriles
    Patent number: H1596
    Abstract: The invention relates to diketontrile derivatives which have been discovered useful against arthropods, plant nematodes, helminth protozoan pests or as intermediates for such useful compounds which have general formula: ##STR1##
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: September 3, 1996
    Assignee: Rh one-Poulenc Inc.
    Inventors: Paul A. Cain, David T. Chou, Themistocles D. J. D'Silva, Daniel B. Gant, Nancy D. Herman