Patents by Inventor Siu-Chung Chan

Siu-Chung Chan 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).

  • Organic light-emitting devices
    Patent number: 7691495
    Abstract: Disclosed are electrophosphorescent organic metal complexes with formula (I) or (II), of either geometrical isomers, comprising two bidentate NN-type ligandsor a tetradentate NNNN-type ligand, and a transition metal. These electrophosphorescent materials are valuable to the application in organic light-emitting devices (OLEDs), including red-, orange-, or yellow-light OLEDs.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: April 6, 2010
    Assignee: The University of Hong Kong
    Inventors: Chi-Ming Che, Siu-Chung Chan
  • WIRELESS TELEPHONE SYSTEM
    Publication number: 20080274730
    Abstract: A wireless telephone system is used to connect a plurality of cordless telephone handsets to a telephone network. The system has a short range radio module for sending and receiving telecommunication signals to and from a plurality of cordless telephone handsets, a cellular communication modules for sending and receiving telecommunication signals to and from a cellular wireless cell site, and a switch for routing telecommunications signals between the plurality of short range radio modules and the one or more cellular communication modules.
    Type: Application
    Filed: May 3, 2007
    Publication date: November 6, 2008
    Applicant: TECH-VISION COMMUNICATIONS Limited
    Inventor: Siu Chung CHAN
  • System and method for producing light with organic light-emitting devices
    Patent number: 7361415
    Abstract: Disclosed are emissive materials of formula (I) or (II), comprising two bidentate NO-type ligands, or a tetradentate NOON-type ligand, and a transition metal. The emissive materials are useful as electrophosphorescent emitters in organic light-emitting devices. Also disclosed are methods for preparing organic light-emitting diodes comprising these emissive materials, and the use of such diodes as white and yellow organic light-emitting devices.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: April 22, 2008
    Assignee: The University of Hong Kong
    Inventors: Chi-Ming Che, Siu-Chung Chan
  • Organic light-emitting devices
    Publication number: 20070148495
    Abstract: Disclosed are electrophosphorescent organic metal complexes with formula (I) or (II), of either geometrical isomers, comprising two bidentate NN-type ligandsor a tetradentate NNNN-type ligand, and a transition metal. These electrophosphorescent materials are valuable to the application in organic light-emitting devices (OLEDs), including red-, orange-, or yellow-light OLEDs.
    Type: Application
    Filed: March 5, 2007
    Publication date: June 28, 2007
    Inventors: Chi-Ming Che, Siu-Chung Chan
  • Organic light-emitting devices
    Publication number: 20050244672
    Abstract: Disclosed are electrophosphorescent organic metal complexes with formula (I), (H), (III) or (IV), of either geometrical isomers, comprising two bidentate NN-type ligands, or two NO-type ligands, or a tetradentate NNNN-type ligand or a tetradentate NOON-type ligand, and a transition metal. These electrophosphorescent materials are valuable to the application in organic light-emitting devices (OLEDs), including red-, orange-, or yellow-light OLEDs.
    Type: Application
    Filed: April 30, 2004
    Publication date: November 3, 2005
    Inventors: Chi-Ming Che, Siu-Chung Chan
  • System and method for producing light with organic light-emitting devices
    Publication number: 20050233167
    Abstract: Disclosed are emissive materials of formula (I) or (II), comprising two bidentate NO-type ligands, or a tetradentate NOON-type ligand, and a transition metal. The emissive materials are useful as electrophosphorescent emitters in organic light-emitting devices. Also disclosed are methods for preparing organic light-emitting diodes comprising these emissive materials, and the use of such diodes as white and yellow organic light-emitting devices.
    Type: Application
    Filed: April 16, 2004
    Publication date: October 20, 2005
    Inventors: Chi-Ming Che, Siu-Chung Chan