Patents by Inventor Josë Silva

Josë Silva 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 direct conversion of methane into acetic acid
    Patent number: 7238838
    Abstract: The invention consists on the utilization of complexes of vanadium (in the +4 and +5 oxidation states) with bi- or poly-dentate ligands coordinated by nitrogen and oxygen (N,O) or by oxygen and oxygen (O,O) atoms, namely derivatives of aminoalcohols, (hydroxyimino)dicarboxylic acids, hydroxypyranones, trifluoroacetic acid, triflic acid or inorganic acid, as catalysts for the direct single-pot conversion, under mild conditions, of methane in acetic acid, either in the absence or in the presence of carbon monoxide, and in the presence of a peroxodisulfate salt (K2S2O8), in trifluoroacetic acid (CF3COOH), according to the general reaction (I).
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: July 3, 2007
    Assignee: Instituto Superior Tecnico
    Inventors: Armando Pombeiro, Joäo Fraústo Da Silva, Yuzo Fujiwara, Josë Silva, Patricia Reis, António F. Palavra