Patents by Inventor Shekhar Munavalli

Shekhar Munavalli 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).

  • Molecular water oxidation catalyst
    Patent number: 5223634
    Abstract: A dimeric composition of the formula: ##STR1## wherein L', L", L'", and L"" are each a bidentate ligand having at least one functional substituent, the ligand selected from bipyridine, phenanthroline, 2-phenylpyridine, bipyrimidine, and bipyrazyl and the functional substituent selected from carboxylic acid, ester, amide, halogenide, anhydride, acyl ketone, alkyl ketone, acid chloride, sulfonic acid, phosphonic acid, and nitro and nitroso groups. An electrochemical oxidation process for the production of the above functionally substituted bidentate ligand diaqua oxo-bridged ruthenium dimers and their use as water oxidation catalysts is described.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: June 29, 1993
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Michael Gratzel, Shekhar Munavalli, Fu-Jann Pern, Arthur J. Frank
  • Preparation of N,N'-methylene-2,2'-azopyridocyanines
    Patent number: 4594413
    Abstract: Disclosed is a one step process for reacting certain aminopyridines and pmidines with a methylene halide, preferably methylene iodide, at reflux for from about overnight to about 72 hours to obtain corresponding N,N'-methylene-2,2'-azopyridocyanines in good yields.
    Type: Grant
    Filed: August 13, 1985
    Date of Patent: June 10, 1986
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Shekhar Munavalli, Edward J. Poziomek