Patents by Inventor Marcelle Janin

Marcelle Janin 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).

  • O-alkylation of phenolic compounds via rare earth orthophosphate catalysts
    Patent number: 5786520
    Abstract: Carbocyclic/aliphatic ethers, for example anisole, quaicol, guaethol, p-methoxyphenol and ethylene dioxybenzene, are selectively prepared, in good yield, by reacting a phenolic compound, for example a phenol, hydroquinone, pyrocatechin, naphthol, or the like, with an alcohol, for example methanol, ethanol, isopropanol, ethylene glycol, etc., in gaseous phase, in the presence of a catalytically effective amount of a trivalent rare earth metal orthophosphate, for example a lanthanum, cerium or samarium orthophosphate, optionally doped with an alkali or alkaline earth metal, preferably cesium.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: July 28, 1998
    Assignee: Rhone-Poulenc Chimie
    Inventors: Laurent Gilbert, Marcelle Janin, Anne-Marie Le Govic, Philippe-Jean Tirel