Patents by Inventor Danny Thien Duc Thieu

Danny Thien Duc Thieu 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).

  • Hi-density sintered alloy
    Patent number: 5656787
    Abstract: A process of forming a sintered article for powder metal comprising blending carbon and ferro alloys and lubricant with compressible elemental iron powder, pressing said blended mixture to form sintering said article, and then high temperature sintering said article in a reducing atmosphere to produce a sintered article having a high density from a single compression.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: August 12, 1997
    Assignee: Stackpole Limited
    Inventors: Rohith Shivanath, Peter Jones, Danny Thien Duc Thieu
  • Hi-density sintered alloy and spheroidization method for pre-alloyed powders
    Patent number: 5641922
    Abstract: This invention relates to a process of forming a sintered article of powder metal comprising blending graphite and lubricant with a pre-alloyed iron based powder, pressing said blended mixture to shape in a single compaction stage sintering said article, and then high temperature sintering said article in a reducing atmosphere to produce a sintered article having a density greater than 7.4 g/cc.
    Type: Grant
    Filed: June 24, 1996
    Date of Patent: June 24, 1997
    Assignee: Stackpole Limited
    Inventors: Rohith Shivanath, Peter Jones, Danny Thien Duc Thieu