Patents by Inventor Thanh-Dung N'Guyen

Thanh-Dung N'Guyen 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 synthesis of tertiary phosphine oxides, and new tertiary phosphine oxides
    Patent number: 4365094
    Abstract: The invention relates to the synthesis of tertiary phosphine oxides and also to certain tertiary phosphine oxides.According to the invention, an organic phase containing a halogenomethyl derivative, a secondary phosphine oxide and a phase transfer catalyst in an organic medium is reacted with an aqueous phase containing an inorganic base. The halogenomethyl derivative can be a micromolecule or a macromolecule.The tertiary phosphine oxides are substances which are useful, in particular, in fireproofing, in hydrometallurgy and in the field of plant health.
    Type: Grant
    Filed: December 5, 1980
    Date of Patent: December 21, 1982
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Sylvie L. Boileau, Thanh-Dung N'Guyen, Jean-Claude C. Gautier