Patents by Inventor Arthur E. Martell

Arthur E. Martell 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).

  • Pyridine-based compounds, especially phosphonates
    Patent number: 5808072
    Abstract: A class of pyridine phosphonate compounds is disclosed that are useful as ligands in the one manufacture of oxidation-reduction catalysts. In particular, pyridine-2,6-disphosphonic acid is a specie of the pyridine phosphonate ligands that can be combined with a polyvalent metal to produce a catalyst to convert hydrogen sulfide to solid sulfur.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: September 15, 1998
    Assignee: U.S. Filter/Engineered Systems
    Inventors: Derek McManus, Arthur E. Martell, Dian Chen
  • Tridentate metal ligands of certain pyridine phosphonic acids
    Patent number: 5686613
    Abstract: Novel pyridine phosphonate ligands are disclosed that when combined with polyvalent metals results in useful catalyst compositions for the conversion of hydrogen sulfide to solid sulfur. Catalysts containing these novel ligands exhibit resistance to metal precipitation and demonstrate little or no oxidative chemical degradation when employed to convert hydrogen sulfide to elemental sulfur.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: November 11, 1997
    Assignee: Wheelabrator Clean Air Systems Inc.
    Inventors: Derek McManus, Arthur E. Martell, Dian Chen
  • Oxidation-reduction process
    Patent number: 5591419
    Abstract: An improved oxidation-reduction process is disclosed that uses catalysts formulated from novel pyridine phosphonate ligands. When these ligands are combined with polyvalent metals the resulting catalyst compositions are useful for the conversion of hydrogen sulfide to solid sulfur. Catalysts containing these novel ligands exhibit resistance to metal precipitation and demonstrate little or no oxidative chemical degradation when employed to convert hydrogen sulfide to elemental sulfur.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: January 7, 1997
    Assignee: Wheelabrator Clean Air Systems Inc.
    Inventors: Derek McManus, Arthur E. Martell, Dian Chen
  • Binuclear metal macrocyclic and macrobicyclic complexes for oxygen separation and transport
    Patent number: 5114688
    Abstract: A binuclear metal complex, comprising a metal-complexed ligand which ligand is formed by the reaction of a dialdehyde and a poly primary amine, which complex is capable of reacting reversibly with molecular oxygen.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: May 19, 1992
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et Exploitation des Procedes Georges Claude
    Inventors: Arthur E. Martell, Ramunas J. Motekaitis