Patents by Inventor Dung A. Ngo

Dung A. Ngo 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: 9175147
    Abstract: A new approach for improving fire resistance of cellulosic materials is provided, especially when the cellulosic material is to be used in polymer composites. Cellulosic material is treated with an aqueous mixture of alkali metal or ammonium hydroxide and alkaline earth or aluminum metal salt simultaneously with or within a short period of time of preparing the mixture. The treated cellulosic material becomes self-extinguishing and may also have improved thermal stability, improved interfacial thermal resistance, improved resistance to damage by oxidants and other chemical agents, improved resistance to biological agents and/or improved resistance to damage by ultra-violet light.
    Type: Grant
    Filed: July 4, 2012
    Date of Patent: November 3, 2015
    Assignee: National Research Council of Canada
    Inventors: Minh-Tan Ton-That, Tri-Dung Ngo, Johanne Denault, Christian Belanger, Wei Hu
  • Patent number: 9043014
    Abstract: Apparatus, and an associated method, for generating a trouble ticket related to an IT incident. When an IT incident occurs, a worklog is formed by a reporter that enters information associated with the incident. Successive inputs, made by appropriate personnel, are made to update the status of the incident. A table-of-contents is formed, associated with the collection of entries of information. And, each entry of information is categorized, to identify the entry by an associated category.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: May 26, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Dung Ngo, Grant I. Campbell, Beth McGreevy
  • Publication number: 20140121306
    Abstract: A new approach for improving fire resistance of cellulosic materials is provided, especially when the cellulosic material is to be used in polymer composites. Cellulosic material is treated with an aqueous mixture of alkali metal or ammonium hydroxide and alkaline earth or aluminum metal salt simultaneously with or within a short period of time of preparing the mixture. The treated cellulosic material becomes self-extinguishing and may also have improved thermal stability, improved interfacial thermal resistance, improved resistance to damage by oxidants and other chemical agents, improved resistance to biological agents and/or improved resistance to damage by ultra-violet light. The fire-resistant cellulosic material may also be treated with a layered nanoparticulate material either simultaneously with, subsequent to or prior to treatment with the aqueous mixture of alkali metal or ammonium hydroxide and alkaline earth or aluminum metal salt to impart further fire resistance to the cellulosic material.
    Type: Application
    Filed: July 4, 2012
    Publication date: May 1, 2014
    Applicant: NATIONAL RESEARCH COUNCIL OF CANADA
    Inventors: Minh-Tan Ton-That, Tri-Dung Ngo, Johanne Denault, Christian Belanger, Wei Hu
  • Publication number: 20090055720
    Abstract: Apparatus, and an associated method, for generating a trouble ticket related to an IT incident. When an IT incident occurs, a worklog is formed by a reporter that enters information associated with the incident. Successive inputs, made by appropriate personnel, are made to update the status of the incident. A table-of-contents is formed, associated with the collection of entries of information. And, each entry of information is categorized, to identify the entry by an associated category.
    Type: Application
    Filed: August 23, 2007
    Publication date: February 26, 2009
    Applicant: ELECTRONIC DATA SYSTEMS CORPORATION
    Inventors: DUNG NGO, GRANT I. CAMPBELL, BETH MCGREEVY
  • Patent number: 6960860
    Abstract: An amorphous metal stator for a high efficiency radial-flux electric motor has a plurality of segments, each of which includes a plurality of layers of amorphous metal strips. The plural segments are arranged to form a generally cylindrical stator having a plurality of teeth sections or poles protruding radially inward from the inner surface of the stator. In a first embodiment, the stator back-iron and teeth are constructed such that radial flux passing through the stator crosses just one air gap when traversing each segment of the stator. In a second embodiment, the stator back-iron and teeth are constructed such that radial flux passing through the stator traverses each segment without crossing an air gap.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: November 1, 2005
    Assignee: Metglas, Inc.
    Inventors: Nicholas J. DeCristofaro, Dung A. Ngo, Richard L. Bye, Jr., Peter J. Stamatis, Gordon E. Fish
  • Patent number: 6829817
    Abstract: The invention provides an apparatus and manufacturing methods useful in the manufacture of large transformer cores, particularly, in the manufacture of large transformer cores made of a ferromagnetic material, especially of annealed amorphous metal alloys. The invention further provides transformer cores produced utilizing the inventive apparatus and manufacturing methods, as well as finished transformers which include such transformer cores.
    Type: Grant
    Filed: January 23, 2003
    Date of Patent: December 14, 2004
    Inventors: Dung A. Ngo, Kimberly M. Borgmeier
  • Patent number: 6765467
    Abstract: Transformer cores, especially those of wound or laminated annealed amorphous metals which include support assemblies are disclosed. Methods for their manufacture, and their use in assembled transformers are also disclosed.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: July 20, 2004
    Inventors: Dung A. Ngo, Donald Christian Pruess, Kimberly M. Borgmeier
  • Patent number: 6668444
    Abstract: The present invention relates to improved transformer cores formed from wound, annealed amorphous metal alloys, particularly multi-limbed transformer cores. Processes for the manufacture of the improved transformer cores, and transformers comprising the improved transformer cores are also described.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: December 30, 2003
    Assignee: Metglas, Inc.
    Inventors: Dung A. Ngo, Kimberly M. Borgmeier
  • Publication number: 20030128094
    Abstract: The invention provides an apparatus and manufacturing methods useful in the manufacture of large transformer cores, particularly, in the manufacture of large transformer cores made of a ferromagnetic material, especially of annealed amorphous metal alloys. The invention further provides transformer cores produced utilizing the inventive apparatus and manufacturing methods, as well as finished transformers which include such transformer cores.
    Type: Application
    Filed: January 23, 2003
    Publication date: July 10, 2003
    Applicant: Honeywell International Inc.
    Inventors: Dung A. Ngo, Kimberly M. Borgmeier
  • Patent number: 6583707
    Abstract: Apparatus and manufacturing methods are provided which are useful in the manufacture of large transformer cores, particularly, in the manufacture of large transformer cores made of a ferromagnetic material, especially of annealed amorphous metal alloys. Further provided are transformer cores produced utilizing the disclosed apparatus and manufacturing methods, as well as finished transformers which include such transformer cores.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: June 24, 2003
    Assignee: Honeywell International Inc.
    Inventors: Dung A. Ngo, Kimberly M. Borgmeier
  • Publication number: 20030020579
    Abstract: The present invention relates to improved transformer cores formed from wound, annealed amorphous metal alloys, particularly multi-limbed transformer cores. Processes for the manufacture of the improved transformer cores, and transformers comprising the improved transformer cores are also described.
    Type: Application
    Filed: April 25, 2001
    Publication date: January 30, 2003
    Inventors: Dung A. Ngo, Kimberly M. Borgmeier
  • Publication number: 20020158744
    Abstract: The invention provides an apparatus and manufacturing methods useful in the manufacture of large transformer cores, particularly, in the manufacture of large transformer cores made of a ferromagnetic material, especially of annealed amorphous metal alloys. The invention further provides transformer cores produced utilizing the inventive apparatus and manufacturing methods, as well as finished transformers which include such transformer cores.
    Type: Application
    Filed: April 25, 2001
    Publication date: October 31, 2002
    Inventors: Dung A. Ngo, Kimberly M. Borgmeier
  • Publication number: 20020157239
    Abstract: Transformer cores, especially those of wound or laminated annealed amorphous metals which include support assemblies are disclosed. Methods for their manufacture, and their use in assembled transformers are also disclosed.
    Type: Application
    Filed: April 25, 2001
    Publication date: October 31, 2002
    Inventors: Dung A. Ngo, Donald Christian Pruess, Kimberly M. Borgmeier
  • Patent number: 6299989
    Abstract: The present invention relates to a high stack factor amorphous metal transformer core, and to a process for constructing a high stack factor amorphous metal transformer core. The process uses high lamination factor amorphous metal ribbon (the term lamination factor is generally used to express the smoothness and uniformity of the ribbon, whereas the term stack factor is applied to cores made from ribbon); that is, amorphous metal ribbon with a highly smooth surface and a highly uniform thickness as measured across the ribbon width. High stack factor amorphous metal ribbon can be efficiently packed, by winding or stacking operations, into compact transformer core shapes. The transformer core can then be clamped, to further reduce overall dimensions, and annealed, to relieve residual mechanical stresses and to generate a desired magnetic anisotropy, without detriment to the final magnetic properties.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: October 9, 2001
    Assignee: AlliedSignal Inc.
    Inventors: Nicholas De Cristofaro, Richard L. Bye, Jr., Dung A. Ngo, Michael L. Briggs
  • Patent number: 6226171
    Abstract: Several inventive features for increasing the yield of substrate capacitors are disclosed. The inventive features relating to selective placement of insulating layers and patches around selected areas of the capacitor's main dielectric layer. These insulating layers and defects prevent certain manufacturing processing steps from creating pin-hole defects in the main dielectric layer. The inventive features are suitable for any type of material for the main dielectric layer, and are particularly suited to anodized dielectric layers.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: May 1, 2001
    Assignee: Fujitsu Limited
    Inventors: Solomon I. Beilin, William T. Chou, Michael G. Lee, David Dung Ngo, Michael G. Peters, James J. Roman, Yasuhito Takahashi
  • Patent number: 6221567
    Abstract: Methods of etching polyamic acid layers and the like are disclosed. In exemplary embodiments of the present invention, the polymeric acid layer to be etched is alternatively exposed to etchant solutions (etchants) and rinse solutions, where the etchant solutions are of relatively moderate alkalinity and the rinse solutions have a lower pH than the etchant solutions. The present invention enables polymeric acid layers to be developed with standard basic etchants at relatively moderate concentrations and at room temperature with little, if any, corrosion to any underlying metal layers. The present invention enables the more reliable and cleaner spin-spray processing method to be employed, thereby significantly increasing yields and reducing overall processing costs. The present invention also enables the etching of thick layers of polymeric acid without the need for special treatments, such as exposure to highly concentrated etchant solutions or high temperature processing conditions.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: April 24, 2001
    Assignee: Fujitsu Limited
    Inventors: Solomon I. Beilin, William T. Chou, David Dung Ngo