Patents by Inventor Curt Fessi

Curt Fessi 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 dispersible colloidal systems of a substance in the form of nanoparticles
    Patent number: 5118528
    Abstract: The process according to the invention comprises: (1) the preparation of a liquid phase consisting essentially of a solution of the substance in a solvent or in a mixture of solvents to which may be added one or more surfactants, (2) the preparation of a second liquid phase consisting essentially of a non-solvent or a mixture of non-solvents for the substance and to which may be added one or more surfactants, the non-solvent or the mixture of non-solvents for the substance being miscible in all proportions with the solvent or the mixture of solvents for the substance, (3) the addition of one of the liquid phases prepared in (1) or (2) to the other with moderate stirring so as to produce a colloidal suspension of nanoparticles of the substance, and (4) is desired, the removal of all or part of the solvent or the mixture of solvents for the substance and of the non-solvent or the mixture of non-solvents for the substance so as to produce a colloidal suspension of nanoparticles of the desired concentration or to
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: June 2, 1992
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Curt Fessi, Jean-Philippe Devissaguet, Francis Puisieux, Curt Thies