Patents by Inventor John Herbert Freudenberger

John Herbert Freudenberger 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).

  • METHODS FOR THE PREPARATION OF 5-BROMO-2-(3-CHLORO-PYRIDIN-2-YL)-2H-PYRAZOLE-3-CARBOXYLIC ACID
    Publication number: 20230002347
    Abstract: Described herein are novel methods of synthesizing 5-Bromo-2-(3-chloro-pyridin-2-yl)-2H-pyrazole-3-carboxylic acid from pyrazole or pyrazole derivatives.
    Type: Application
    Filed: October 16, 2020
    Publication date: January 5, 2023
    Inventors: Yuzhong CHEN, John Herbert FREUDENBERGER, James WRIGHT
  • Substituted dihydro 3-halo-1H-pyrazole-5-carboxylates their preparation and use
    Patent number: 7402676
    Abstract: This invention relates to a compound of Formula I, a method for its preparation and its use in the preparation of a compound of Formula II wherein R1, R2, R3, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III wherein R1, R2, R6, R7, R8 and n are as defined in the disclosure. Also disclosed are certain intermediates of Formula 4 for the preparation of compounds of Formula I wherein X is N and R2, R3 and n are as defined in the disclosure.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: July 22, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventor: John Herbert Freudenberger
  • Substituted dihydro 3-halo-1H-pyrazole-T-carboxylates, their preparation and use
    Patent number: 7227025
    Abstract: This invention relates to a compound of Formula I, a method for its preparation and its use in the preparation of a compound of Formula II wherein R1, R2, R3, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III wherein R1, R2, R6, R7, R8 and n are as defined in the disclosure. Also disclosed are certain intermediates of Formula 4 for the preparation of compounds of Formula I wherein X is N and R2, R3 and n are as defined in the disclosure.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: June 5, 2007
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Herbert Freudenberger, George Philip Lahm, Thomas Paul Selby, Thomas Martin Stevenson
  • Substituted dihydro 3-halo-1h-pyrazole-5-carboxylates and their preparation and use
    Patent number: 6965032
    Abstract: This invention relates to a compound of Formula I, a method for its preparation and its use in the preparation of a compound of Formula II wherein R1, R2, R3, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III wherein R1, R2, R6, R7, R8 and n are as defined in the disclosure. Also disclosed are certain intermediates of Formula 4 for the preparation of compounds of Formula I wherein X is N and R2, R3 and n are as defined in the disclosure.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: November 15, 2005
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Herbert Freudenberger
  • Substituted dihydro 3-halo-1h-pyrazole-5-carboxylates their preparation and use
    Publication number: 20040198987
    Abstract: This invention relates to a compound of Formula I, a method for its preparation and its use in the preparation of a compound of Formula II wherein R1, R2, R3, X and n are as defined in the disclosure. This invention also discloses preparation of compounds of Formula III wherein R1, R2, R6, R7, R8 and n are as defined in the disclosure. Also disclosed are certain intermediates of Formula 4 for the preparation of compounds of Formula I wherein X is N and R2, R3 and n are as defined in the disclosure.
    Type: Application
    Filed: December 30, 2003
    Publication date: October 7, 2004
    Inventors: John Herbert Freudenberger, George Philip Lahm, Tom Paul Selby, Thomas Martin Stevenson