Patents by Inventor Philipe-Jean Tirel

Philipe-Jean Tirel 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).

  • Preparation of phenols by direct N.sub.2 O hydroxylation of aromatic substrates
    Patent number: 5055623
    Abstract: Phenol/substituted phenols are prepared by directly hydroxylating an aromatic substrate with nitrous oxide, in vapor phase, in the presence of a modified (acidified) ZSM-5 or ZSM-11 zeolite, containing such elements as Ga, Fe, B, In, Cr, Sc, Co, Ni, Be, Zn, Cu, Sb, As or V.
    Type: Grant
    Filed: June 22, 1990
    Date of Patent: October 8, 1991
    Assignee: Rhone-Poulenc Chimie
    Inventors: Michel Gubelmann, Jean-Michel Popa, Philipe-Jean Tirel