Patents by Inventor Peter Dominic Riordan

Peter Dominic Riordan 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 the preparation of 2-aminomethylpyridines and the 2-cyanopyridines used in their preparation
    Patent number: 7321043
    Abstract: Disclosed herein is a process for the preparation of a compound of the formula (II): or a salt thereof, wherein X is halogen; each Y, which may be the same or different, is halogen, haloalkyl, alkoxycarbonyl or alkylsulphonyl, and n is 0 to 3; which process comprises treating a compound of the formula (III): with a cyanide source and a catalyst selected from the group consisting of a tetraalkyl ammonium salt and a tetraalkyl phosphonium salt in an aqueous solvent or without solvent, wherein: X is halogen; each Y, which may be the same or different, is halogen, haloalkyl, alkoxycarbonyl or alkylsulphonyl: and n is 0 to 3; and wherein the cyanide source is hydrogen cyanide, an alkali metal cyanide, an alkaline earth metal cyanide or an optionally substituted ammonium cyanide.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: January 22, 2008
    Assignee: Bayer Cropscience S.A.
    Inventors: Norman Dann, Peter Dominic Riordan, Mehul Rasikchandra Amin, Michael Mellor
  • Processes for the preparation of 2-aminomethlpyridines and the 2-cyanopyridines used in their preparation
    Patent number: 6921828
    Abstract: The invention relates to a process for the preparation of a compound of formula (V), according to the following scheme: wherein the various substituants are as defined in the description
    Type: Grant
    Filed: August 21, 2001
    Date of Patent: July 26, 2005
    Assignee: Bayer CropScience S.A.
    Inventors: Norman Dann, Peter Dominic Riordan, Mehul Rasikchandra Amin, Michael Mellor
  • Novel process
    Publication number: 20040049048
    Abstract: The invention relates to a process for the preparation of a compound of formula (V), according to the following scheme: wherein the various substituants are as defined in the description.
    Type: Application
    Filed: June 11, 2003
    Publication date: March 11, 2004
    Inventors: Norman Dann, Peter Dominic Riordan, Mehul Rasikchandra Amin, Michael Mellor
  • Process for the preparation of 2-cyanopyridines
    Patent number: 6699993
    Abstract: The invention relates to a process for the preparation of a compound of formula (I): wherein Y and n are as defined in the description.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: March 2, 2004
    Assignee: Bayer CropScience GmbH
    Inventors: Peter Dominic Riordan, Mehul Rasikchandra Amin, Timothy Harry Jackson
  • Anilide derivatives as fungicides
    Patent number: 5756524
    Abstract: A compound of formula I ##STR1## X is O or S; A is 6-alkoxy-3-pyridyl optionally substituted by halogen;Y is hydrogen or alkyl;R.sup.3 is alkyl or a metal salt complex thereof. This invention contains fungicidal compositions and are used to combat cytopathogenic fungi.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: May 26, 1998
    Assignee: Agrevo UK Limited
    Inventors: Peter Dominic Riordan, Susan Elizabeth Osbourn, Ian Kenneth Boddy