Patents by Inventor Stephan Dan Costea

Stephan Dan Costea 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).

  • Patent number: 8710354
    Abstract: A solar cell may include a light sensitive molecule such as a hyperpolarizable molecule. In one example, a solar cell may include a layer of hyperpolarizable molecules disposed between a p-type electrode and an n-type electrode. In some cases, at least some of the hyperpolarizable molecules may include an electron donating group that is bonded or otherwise linked to the n-type electrode as well as an electron accepting group that is bonded or otherwise linked to the p-type electrode. In some instances, at least some of the hyperpolarizable molecules may include an electron donating group that is bonded or otherwise linked to the p-type electrode as well as an electron accepting group that is bonded or otherwise linked to the n-type electrode.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: April 29, 2014
    Assignee: Honeywell International Inc.
    Inventors: Mihai N. Mihaila, Bogdan Catalin Serban, Viorel Georgel Dumitru, Mircea Bercu, Cazimir Bostan, Stephan Dan Costea
  • Patent number: 8288649
    Abstract: A solar cell may include a quantum dot and an electron conductor. A bifunctional ligand may be disposed between the quantum dot and the electron conductor. The ligand molecule may include an electron conductor anchor that bonds to the electron conductor and a first quantum dot anchor that bonds to the quantum dot. A hole conductor such as a conductive polymer may include a second quantum dot anchor.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: October 16, 2012
    Assignee: Honeywell International Inc.
    Inventors: Bogdan Serban, Mihai N. Mihaila, Viorel Georgel Dumitru, Stephan Dan Costea
  • Patent number: 8227687
    Abstract: A solar cell is disclosed that may include a quantum dot, an electron conductor, and a bifunctional ligand disposed between the quantum dot and the electron conductor. The bifunctional ligand may include a first anchor group that bonds to the quantum dot and a second anchor group that bonds to the electron conductor. The solar cell may include a hole conductor that is configured to reduce the quantum dot once the quantum dot absorbs a photon and ejects an electron through the bifunctional ligand and into the electron conductor. The hole conductor may be a p-type polymer.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: July 24, 2012
    Assignee: Honeywell International Inc.
    Inventors: Bogdan Serban, Mihai N. Mihaila, Stephan Dan Costea, Octavian Buiu
  • Patent number: 8227686
    Abstract: A solar cell is disclosed that may include a quantum dot, an electron conductor, and a bifunctional ligand disposed between the quantum dot and the electron conductor. The bifunctional ligand may include a first anchor group that bonds to the quantum dot and a second anchor group that bonds to the electron conductor. The solar cell may include a hole conductor that is configured to reduce the quantum dot once the quantum dot absorbs a photon and ejects an electron through the bifunctional ligand and into the electron conductor. The hole conductor may be a p-type polymer.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: July 24, 2012
    Assignee: Honeywell International Inc.
    Inventors: Bogdan Serban, Mihai N. Mihaila, Stephan Dan Costea, Mircea Bercu
  • Patent number: 8148632
    Abstract: Example solar cells and methods for making and using the same are disclosed. An example solar cell may include an electron conductor layer, a quantum dot layer, a bifunctional ligand layer coupling the electron conductor layer and the quantum dot layer, and a hole conductor layer coupled to the quantum dot layer. The bifunctional ligand layer may include an antibiotic, and in some cases, a cephalosporin-based antibiotic.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: April 3, 2012
    Assignee: Honeywell International Inc.
    Inventors: Bogdan Serban, Mihai N. Mihaila, Viorel Georgel Dumitru, Cazimir Bostan, Stephan Dan Costea, Mircea Bercu
  • Publication number: 20100012191
    Abstract: Example solar cells and methods for making and using the same are disclosed. An example solar cell may include an electron conductor layer, a quantum dot layer, a bifunctional ligand layer coupling the electron conductor layer and the quantum dot layer, and a hole conductor layer coupled to the quantum dot layer. The bifunctional ligand layer may include an antibiotic, and in some cases, a cephalosporin-based antibiotic.
    Type: Application
    Filed: July 14, 2009
    Publication date: January 21, 2010
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Bogdan-Catalin Serban, Mihai N. Mihaila, Viorel-Georgel Dumitru, Cazimir-Gabriel Bostan, Stephan-Dan Costea, Mircea Bercu
  • Publication number: 20090159124
    Abstract: A solar cell may include a light sensitive molecule such as a hyperpolarizable molecule. In one example, a solar cell may include a layer of hyperpolarizable molecules disposed between a p-type electrode and an n-type electrode. In some cases, at least some of the hyperpolarizable molecules may include an electron donating group that is bonded or otherwise linked to the n-type electrode as well as an electron accepting group that is bonded or otherwise linked to the p-type electrode. In some instances, at least some of the hyperpolarizable molecules may include an electron donating group that is bonded or otherwise linked to the p-type electrode as well as an electron accepting group that is bonded or otherwise linked to the n-type electrode.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 25, 2009
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Mihai N. Mihaila, Bogdan-Catalin Serban, Viorel Georgel Dumitru, Mircea Bercu, Cazimir Bostan, Stephan Dan Costea