Patents by Inventor Laurent Carmona

Laurent Carmona 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 preparation of the enol lactone of 2-oxocyclohexlidene acetic acid and application to the preparation of 2-cuomaranone
    Patent number: 5773632
    Abstract: A process for the preparation of the enol lactone of 2-oxocyclohexylidene acetic acid wherein(i) glyoxylic acid is allowed to react with cyclohexanone in the presence of a halogen acid in order to obtain a crude reaction product B1, then(ii) said crude reaction product B1 is allowed to react, after solubilisation in an organic solvent, in the presence of a strong acid soluble in said organic solvent or of strongly acid resins, in order to obtain the enol lactone of 2-oxocyclohexylidene acetic acid which is isolated if desired,and application to the preparation of 2-coumaranone.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: June 30, 1998
    Assignee: Clariant Chimie S.A.
    Inventors: Nathalie Carmona, Laurent Carmona, Alain Perrard, Jean-Claude Vallejos