Patents by Inventor Jean L. Helom

Jean L. Helom 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 the synthesis of sulfonyl halides and sulfonamides from sulfonic acid salts
    Patent number: 7842834
    Abstract: The present invention provides synthetic processes for the preparation of sulfonyl halides of Formula Ar—(R)z—SO2—X and sulfonamides of Formula Ar—(R)z—SO2—NR4R5, where the constituent variables are as defined herein, that are useful as intermediates in the preparation of pharmaceuticals.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: November 30, 2010
    Assignee: Wyeth LLC
    Inventors: Ronald S. Michalak, Jean L. Helom, Joseph Zeldis