Patents by Inventor Guy Fleche

Guy Fleche 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 ketones corresponding to 1,4-3,6-dianhydrohexitols by anodic electrooxidation
    Patent number: 4543168
    Abstract: Process for the preparation of ketone derivatives of isomannide and of isosorbide, wherein an aqueous solution of isomannide or of isosorbide comprising an electrolyte, particularly an alkali halide, preferably a bromide and, more preferably still, sodium bromide, are subjected to anodic electrooxidation.
    Type: Grant
    Filed: May 2, 1984
    Date of Patent: September 24, 1985
    Assignee: Roquette Freres
    Inventors: Guy Fleche, Antoine Gaset, Jacquet Fabienne
  • Process for manufacturing 5-hydroxymethylfurfural
    Patent number: 4339387
    Abstract: The invention relates to a process for manufacturing 5-hydroxymethylfurfural.This process comprises decomposition of a hexose in a reaction medium constituted by water and an organic solvent, by heating to a temperature below 100.degree. C., situated especially in the range from 70.degree. to 95.degree. C., in the presence of a solid catalytic support, especially an exchange resin with a cationic function.5-hydroxymethylfurfural is applied in numerous syntheses.
    Type: Grant
    Filed: August 27, 1980
    Date of Patent: July 13, 1982
    Assignee: Roquette Freres
    Inventors: Guy Fleche, Antoine Gaset, Jean-Pierre Gorrichon, Eric Truchot, Philippe Sicard
  • Process for the depolymerization of starch by irraciation and products so obtained
    Patent number: 4115146
    Abstract: Process for depolymerizing starch by irradiation in which granular starch, whose water content is at the most about 23%, is subjected, in the presence of an acid which is neutralized at the end of the treatment, to a dose of radiation which is a function of the nature and of the quantity of the acid used.
    Type: Grant
    Filed: October 27, 1976
    Date of Patent: September 19, 1978
    Assignees: Commissariat a l'Energie Atomique, Roquette Freres
    Inventors: Louis Saint-Lebe, Gerard Berger, Jean-Pierre Michel, Michel Huchette, Guy Fleche