Patents by Inventor Chieh-Cheng Chen

Chieh-Cheng Chen 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).

  • Publication number: 20090044087
    Abstract: A data slicer includes an error bit predictor, a DC level compensator, a co-channel detector, and an output device. The data slicer generates four bytes according to four slicing levels respectively. The four slicing levels are a DC level, a level generated by adding a predetermined offset to the DC level, a level generated by subtracting the predetermined offset from the DC level, and a compensated level generated by the DC level compensator. The co-channel detector determines if the compensated level has the co-channel interference. The output device generates an output byte according to indication signals generated by the co-channel detector and the error bit predictor and the parity check of the four bytes.
    Type: Application
    Filed: November 22, 2007
    Publication date: February 12, 2009
    Inventors: Chieh-Cheng Chen, Ho-Lin Wang, Ting Chiou
  • Publication number: 20080008892
    Abstract: A powder-compressed assembly including a pressed main body and at least one clip is disclosed. The pressed main body has at least one predetermined recess, and the clip functions as an externally connecting contact. When the pressed main body and the clip are assembled, the clip is deformedly pressurized for engagement with the predetermined recess, thereby tightly combining the pressed main body and the clip. Also, a manufacturing method of the above-mentioned powder-compressed assembly is disclosed.
    Type: Application
    Filed: June 5, 2007
    Publication date: January 10, 2008
    Inventors: Ru-Kuen Huang, Chieh-Cheng Chen
  • Publication number: 20070205898
    Abstract: A manufacturing method of an air coil with leads includes the following steps. Firstly, at least one conductive bump is formed on a base, and the base has at least one lead. Then, at least one end of at least one coil body is disposed on the lead, and is correspondingly contacted with the conductive bump. Finally, the shape of the conductive bump is changed to connect the lead and the coil body.
    Type: Application
    Filed: February 13, 2007
    Publication date: September 6, 2007
    Inventors: Ru-Kuen Huang, Chieh-Cheng Chen
  • Publication number: 20070155223
    Abstract: A connector includes an indicator and a connector body. The indicator includes a light-emitting part and an extension body. The extension body covers the light-emitting part. The extension body and the light-emitting part are integrally formed as a single piece. The connector body has an accommodation space which at least one portion of the extension body is disposed therein.
    Type: Application
    Filed: January 3, 2007
    Publication date: July 5, 2007
    Inventors: Ru-Kuen Huang, Chieh-Cheng Chen
  • Publication number: 20070154135
    Abstract: A connector includes an indicator and a connector body. The indicator includes a light-emitting part and a light-guiding structure. The light-guiding structure guides the light emitted from the light-emitting part to one end of the light-guiding structure, which is away from the light-emitting part. The portion of the light-guiding structure is a hollow structure. The connector body has an accommodating space in which at least one portion of the light-guiding structure is disposed.
    Type: Application
    Filed: January 3, 2007
    Publication date: July 5, 2007
    Inventors: Ru-Kuen Huang, Chieh-Cheng Chen
  • Patent number: 6638575
    Abstract: Oxygen and hydrogen transport membranes fabricated by plasma spray deposition of a micro-crack-free coating on a substrate. Also disclosed is a multi-layer composite comprising a dense or porous substrate coated with a coating provided by supersonic plasma spray deposition. Also disclosed is subsonic plasma spray deposition of single phase or dual phase nanocrystalline particles to form a crack-free oxygen transport membrane on a substrate.
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: October 28, 2003
    Assignee: Praxair Technology, Inc.
    Inventors: Jack Chieh-Cheng Chen, Hancun Chen, Ravi Prasad, Glenn Whichard
  • Patent number: 6332964
    Abstract: A multi-phase solid electrolyte ion transport membrane comprising at least two phases wherein one of the phases comprises an oxygen ion single conductive material. The other phase comprises an electronically-conductive metal or metal oxide conducting phase is present in a low volume percentage. One method for achieving this result incorporates the minority phase into the powder from which the membrane is made by deposition of the metal or metal oxide from a polymer made by polymerizing a chelated metal dispersion in a polymerizable organic monomer or prepolymer. The multi-phase composition advantageously comprises a first phase of a ceramic material and a second phase of a metal or metal oxide bound to a surface of the ceramic material. A second method fabricates the membrane from a mixture of two powders one of which contains a mixture of the two phases.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: December 25, 2001
    Assignees: Praxair Technology, Inc., BP Amoco Corporation
    Inventors: Chieh Cheng Chen, Ravi Prasad, Terry J. Mazanec, Charles J. Besecker
  • Patent number: 6235187
    Abstract: A ceramic membrane element for an oxygen separator is formed from a ceramic material represented by the structure: A1-xA′xB1-yB′yO3-z where A is a lanthanide element; A′ is a suitable lanthanide element dopant; B is selected from the group consisting of titanium, vanadium, chromium, manganese, iron, cobalt, nickel, zinc and mixtures thereof; B′ is copper; x is between 0.4 and 0.8; y is between 0.1 and 0.9; and z is>0 (and determined by stoichiometry). When B includes cobalt in an amount greater than 0.1, the included iron content is less than 0.05. The membrane element selectively transports oxygen ions therethrough at a relatively low temperature, with a flux detected at about 600° C. This enables the oxygen separator to be operated at lower temperatures than convention separators that frequently have operating temperatures in excess of 900° C. Mechanical stability may be enhanced by the addition of a second phase to the ceramic.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: May 22, 2001
    Assignee: Praxair Technology Inc.
    Inventors: Harlan U. Anderson, Vincent Sprenkle, Ingeborg Kaus, Chieh-Cheng Chen
  • Patent number: 6187157
    Abstract: A multi-phase solid electrolyte ion transport membrane comprising at least two phases wherein one of the phases comprises an oxygen ion single conductive material, or a mixed conductor. The other phase comprises an electronically-conductive metal or metal oxide that is incorporated into the membrane by deposition of the metal or metal oxide from a polymer made by polymerizing a chelated metal dispersion in a polymerizable organic monomer or prepolymer. The multi-phase composition advantageously comprises a first phase of a ceramic material and a second phase of a metal or metal oxide bound to a surface of the ceramic material. The multi-phase composition is advantageously prepared in an in-situ fashion before fabricating the membrane matrix. As another alternative, a preformed ceramic matrix is surface-coated with a metal or metal oxide.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: February 13, 2001
    Assignee: Praxair Technology, Inc.
    Inventors: Chieh-Cheng Chen, Ravi Prasad
  • Patent number: 6165553
    Abstract: A method of fabricating a dense membrane by providing a colloidal suspension of a ceramic powder, and providing a polymeric precursor. The precursor is mixed together with the colloidal suspension, and the mixture is applied to a membrane support to form a composite structure. The composite structure is heated to form a dense membrane on the support.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: December 26, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Chieh-Cheng Chen, Ravi Prasad
  • Patent number: 6146445
    Abstract: A stable substantially cubic perovskite crystalline structure of at least one strontium-doped lanthanum cobalt oxide (LSC) having a stabilizing amount of at least one cerium gadolinium oxide (CGO) therein.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: November 14, 2000
    Assignee: Praxair Technology, Inc.
    Inventors: Chieh-Cheng Chen, Ravi Prasad
  • Patent number: 5938822
    Abstract: A solid electrolyte ion transport membrane composite for separating a gaseous species from a gaseous mixture in which the composite has a dense matrix material and a porous coating. The dense membrane is comprised of a matrix material which conducts at least one type of ion, and at least one membrane constituent. The porous coating is disposed on the membrane to enhance the rate of surface reactions involving the gaseous species.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: August 17, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Chieh Cheng Chen, Ravi Prasad, Christian Friedrich Gottzmann
  • Patent number: 5911860
    Abstract: A solid electrolyte ion transport membrane comprising a matrix material which conducts at least one type of ion such as oxygen ions, and at least one constituent which is physically distinct from the matrix material and which enhances the mechanical properties, the catalytic properties and/or the sintering behavior of the matrix material. The constituent is present in a manner which precludes continuous electronic conductivity through the constituent across the membrane.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: June 15, 1999
    Assignee: Praxair Technology, Inc.
    Inventors: Chieh Cheng Chen, Ravi Prasad
  • Patent number: 5494700
    Abstract: A method for preparing a substrate coated with a polycrystalline, metal oxide film using polymeric precursors. The oxide films prepared by the method of the present invention are dense (i.e., substantially free of cracks and pinholes) and may be used, for example, as an electrolyte or electrode in intermediate temperature solid oxide fuel cells (SOFCs) or as gas separation membranes.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: February 27, 1996
    Assignee: The Curators of the University of Missouri
    Inventors: Harlan U. Anderson, Magdi M. Nasrallah, Chieh-Cheng Chen