Patents by Inventor Venkataraman Kameswaran

Venkataraman Kameswaran 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 3-heterocyclic substituted benzisothiazole and benzisoxazole compounds
    Patent number: 6706663
    Abstract: There are provided 3-heterocyclic substituted benzisothiazole and benzisoxazole compounds having the structural formula I where Q, X, X1 and Z are defined as in claim 1. Further provided are compositions and methods comprising those compounds for the control of undesirable plant species.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: March 16, 2004
    Assignee: Wyeth
    Inventors: Peter John Wepplo, Richard Anthony Rampulla, Gavin David Heffernan, Michael Vernie Cossette, Charles Malcolm Langevine, Venkataraman Kameswaran, Robert Eugene Diehl, James Joseph Fiordeliso, Gregory Jay Haley, Michael Anthony Guaciaro
  • Process for the preparation of 2-aryl-5- (perfluoro-alkyl)pyrrole compounds from N-[1-chloro-1-(perfluoroalkyl)methyl] arylimidoyl chloride compounds
    Patent number: 6596902
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-[1-chloro-1-(perfluoroalkyl)methyl]arylimidoyl chloride compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds. In addition, the present invention provides compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: July 22, 2003
    Assignee: BASF Aktiengesellschaft
    Inventor: Venkataraman Kameswaran
  • Method for detecting uracil biosynthesis inhibitors and their use as herbicides
    Publication number: 20020058244
    Abstract: This invention relates to a method for identifying compounds that specifically inhibit a metabolic target site or pathway in plants. Enzymes which are specifically affected by the method of the invention include plant pyrimidine biosynthetic pathway enzymes, and particularly the enzymes involved in the conversion of orotate to uridine-5′-monophosphate (UMP). Further, the invention relates to a method for control of undesirable monocotyledenous and dicotyledenous plant species.
    Type: Application
    Filed: July 13, 2001
    Publication date: May 16, 2002
    Inventors: Marianne K. Pedersen, Iwona T. Birk, Ann B. Orth, Bijay K. Singh, Berhane Tecle, Venkataraman Kameswaran, Stephen S. Szucs
  • Process for the preparation of 2-aryl-5- (perfluoro-alkyl) pyrrole compounds from N-[1-chloro-1-(perfluoroalkyl) methyl] arylimidoyl chloride compounds
    Publication number: 20020049338
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-[1-chloro-1-(perfluoroalkyl)methyl]arylimidoyl chloride compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds.
    Type: Application
    Filed: September 20, 2001
    Publication date: April 25, 2002
    Applicant: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Substituted anilide insecticidal agents
    Patent number: 6359009
    Abstract: Pesticidal substituted anilide compounds having the structural formula I and compositions and methods comprising those compounds for the control of insect pests.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: March 19, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Robert Eugene Diehl, Tatao Luo, Michael Frank Treacy, Keith Douglas Barnes, Venkataraman Kameswaran
  • Processes and intermediate compounds for the preparation of 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1, 3- oxazin-6-one and 6-(perfluoroalkyl) uracil compounds
    Patent number: 6355796
    Abstract: An improved process and intermediate compounds for the preparation of 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula I and an improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula V
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: March 12, 2002
    Assignee: BASF Aktiengesellschaft
    Inventor: Venkataraman Kameswaran
  • Herbicidal 3 -heterocyclic substituted benzisothiazole and benzisoxazole compounds
    Publication number: 20020028748
    Abstract: There are provided 3-heterocyclic substituted benzisothiazole and benzisoxazole compounds having the structural formula I 1
    Type: Application
    Filed: April 17, 2001
    Publication date: March 7, 2002
    Applicant: Intellectual Property Department BASF Aktiengesellschaft
    Inventors: Peter John Wepplo, Richard Anthony Rampulla, Gavin David Heffernan, Michael Vernie Cossette, Charles Malcolm Langevine, Venkataraman Kameswaran, Robert Eugene Diehl, James Joseph Fiordeliso, Gregory Jay Haley, Michael Anthony Guaciaro
  • Process for the preparation of 2-aryl-5-(perfluoro-alkyl) pyrrole compounds from N-[1-chloro-1-(perfluoroalkyl) methyl] arylimidoyl chloride compounds
    Patent number: 6320059
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-[1-chloro-1-(perfluoroalkyl)methyl]arylimidoyl chloride compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acrid pests, and may also be used to prepare other pesticidal arylpyrrole compounds. In addition, the present invention provides compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: November 20, 2001
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of 6-(perfluoroalkyl) uracil compounds from carbamate compounds
    Patent number: 6313295
    Abstract: An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I from carbamate compounds having the structural formula II
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: November 6, 2001
    Assignee: BASF Aktiengesellschaft
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of substituted benzophenones
    Publication number: 20010031753
    Abstract: There is provided an efficient and effective process for the preparation of a compound of formula I (I) 1
    Type: Application
    Filed: January 11, 2001
    Publication date: October 18, 2001
    Applicant: BASF Corporation
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of 6-(perfluoroalkyl) uracil compounds form urea compounds
    Patent number: 6191275
    Abstract: An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I from urea compounds having the structural formula II
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: February 20, 2001
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of 6-(perfluoroalkyl) uracil compounds from 2-(N,N-disubstituted) amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds
    Patent number: 6140270
    Abstract: An improved process for the preparation of 6-(perfluoroalkyl)uracil compounds having the structural formula I ##STR1## from 2-(N,N-disubstituted)amino-4-(perfluoroalkyl)-1,3-oxazin-6-one compounds having the structural formula II ##STR2##
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: October 31, 2000
    Assignee: American Cyanamid Company
    Inventors: Richard Anthony Rampulla, Venkataraman Kameswaran, Peter John Wepplo
  • Process for the preparation of 2-aryl-5(perfluoro-alkyl) pyrrole compounds from N-(arylmethylene)-1-chloro-1-(perfluoroalkyl) methylamine compounds
    Patent number: 6133455
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-(arylmethylene)-1-chloro-1-(perfluoroalkyl)methylamine compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds.In addition, the present invention provides N-(arylmethylene)-1-chloro-1-(perfluoroalkyl)methylamine compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: October 17, 2000
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • N-(arylmethylene)-1-chloro-1-(perfluoroalkyl) methylamine compounds
    Patent number: 6034273
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-(arylmethylene)-1-chloro-1-(perfluoroalkyl)methylamine compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds.The present invention provides N-(arylmethylene)-1-chloro-1-(perfluoroalkyl)methylamine compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: March 7, 2000
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-(perfluoro-alkylmethyl)arylimidoyl chloride compounds
    Patent number: 6011161
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-(perfluoroalkylmethyl)arylimidoyl chloride compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds. In addition, the present invention provides N-(perfluoroalkylmethyl)arylimidoyl chloride compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: January 4, 2000
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of 2-aryl-5-(perfluoroalkyl) pyrrole compounds from N-(perfluoroalkylmethyl) arylimidoyl chloride compounds
    Patent number: 5965773
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-(perfluoroalkylmethyl)arylimidoyl chloride compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds.In addition, the present invention provides N-(perfluoroalkylmethyl)arylimidoyl chloride compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: October 12, 1999
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Ammonium oxazole and amino oxazolium intermediates, methods for the preparation thereof and the use therefor in the manufacture of insecticidal arylpyrroles
    Patent number: 5945538
    Abstract: There are provided ammonium oxazole intermediates of formula I and amino oxazolium intermediates of formula II, useful in the manufacture of insecticidal arylpyrrole compounds.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: August 31, 1999
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Ammonium oxazole and amino oxazolium intermediates, methods for the preparation thereof and the use thereof in the manufacture of insecticidal arylpyrroles
    Patent number: 5925773
    Abstract: There are provided ammonium oxazole intermediates of formula I and amino oxazolium intermediates of formula II, useful in the manufacture of insecticidal arylpyrrole compounds.
    Type: Grant
    Filed: June 27, 1997
    Date of Patent: July 20, 1999
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of unsymmetrical 4,6-bis aryloxy-pyrimidine compounds
    Patent number: 5849910
    Abstract: This invention provides an improved process for the preparation of unsymmetrical 4,6-bis(aryloxy)pyrimidine compounds having the structural formula I ##STR1## The unsymmetrical 4,6-bis(aryloxy)pyrimidine compounds are useful as pesticidal agents.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: December 15, 1998
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran
  • Process for the preparation of 2-aryl-5-(perfluoro-alkyl) pyrrole compounds from N-(perfluoroalkyl-methyl) arylimidoyl chloride compounds
    Patent number: 5817834
    Abstract: There is provided a process for the preparation of 2-aryl-5-(perfluoroalkyl)pyrrole compounds from N-(perfluoroalkylmethyl)arylimidoyl chloride compounds. The 2-aryl-5-(perfluoroalkyl)pyrrole compounds are useful for the control of insect and acarid pests, and may also be used to prepare other pesticidal arylpyrrole compounds. In addition, the present invention provides N-(perfluoroalkylmethyl)arylimidoyl chloride compounds which are useful as intermediates in the preparation of arylpyrrole compounds.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: October 6, 1998
    Assignee: American Cyanamid Company
    Inventor: Venkataraman Kameswaran