Patents by Inventor Catherine Dubuisson-Brengel

Catherine Dubuisson-Brengel 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).

  • Process for substituted hydrazides using carboxylic acids
    Patent number: 6096890
    Abstract: This invention provides a convenient process for the preparation of monoacylhydrazines from carboxylic acids or their salts and hydrazine or substituted hydrazine in the presence of a 1,3,5-triazine substituted with at least one chloro or fluoro. The resulting monoacylhydrazine can further be converted to a diacylhydrazine by effectively either repeating the reaction or through reaction with a carboxylic acid chloride.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: August 1, 2000
    Assignee: Rohm and Haas Company
    Inventors: Catherine Dubuisson-Brengel, Heather Lynnette Rayle