Patents by Inventor Mohammad K. Nazeeruddin

Mohammad K. Nazeeruddin 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).

  • Phosphonated polypyridyl compounds and their complexes
    Patent number: 5789592
    Abstract: A compound in metal-free or metal complex form of formula (1) to (3) in which R is hydrogen or C.sub.1-30 alkyl; X is hydrogen, halogen (preferably Cl or Br) or C.sub.1-30 alkyl.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: August 4, 1998
    Assignee: Ecole Polytechnique Federale de Lausanne
    Inventors: Michael Gratzel, Oliver Kohle, Mohammad K. Nazeeruddin, Peter Pechy, Francois P. Rotzinger, Stephan Ruile, Shaik Mohammad Zakeeruddin
  • Bi-pyridyl-rumetal complexes
    Patent number: 5463057
    Abstract: A compound of formula (I): (X).sub.n RuLL.sub.1 where n is 1 or 2, preferably 2, and in which Ru is ruthenium; each X independently is selected from Cl, SCN, H.sub.2 O, Br, I, CN and SeCN and L is a ligand of formulae (a) to (g) and L.sub.1 is selected from a ligand of formulae (a) to (c) where each R independently is selected from OH, hydrogen, C.sub.1-20 alkyl, --OR.sub.a or --N(R.sub.a).sub.2 and each R.sub.a independently is hydrogen or C.sub.1-4 alkyl.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: October 31, 1995
    Assignee: Ecole Polytechnique Federale de Lausanne, (EPFL)
    Inventors: Michael Graetzel, Mohammad K. Nazeeruddin
  • Photovoltaic cells
    Patent number: 5350644
    Abstract: A photovoltaic cell comprising a light transmitting electrically conductive layer deposited on a glass plate or a transparent polymer sheet to which a series of titanium dioxide layers have been applied, in which at leash the last titanium dioxide layer (optionally also the second to last and third to last layer) are doped with a metal ion which is selected from a divalent or trivalent metal.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: September 27, 1994
    Assignee: Ecole Polytechnique, Federale de Lausanne
    Inventors: Michael Graetzel, Mohammad K. Nazeeruddin, Brian O'Regan