Patents by Inventor Kelly Kwo

Kelly Kwo 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).

  • Compositions and methods for selective deposition modeling
    Patent number: 6406531
    Abstract: Phase change compositions that are solid at ambient temperature and liquid at an elevated temperature above ambient temperature are disclosed for advantageous use in selective deposition modeling methods for building three-dimensional objects. A phase change composition according to the disclosed invention is a semi-crystalline component mixture having a freezing point of at least about 68° C., a melting point of at least about 88° C. and a viscosity of about 13 centipoise at 135° C. The composition includes a plurality of waxes having a broad melting point range and molecular weight range. Three-dimensional objects having minimal curl, delamination and stress cracks can be produced at a faster rate than heretofore known by using selective deposition modeling techniques employing the disclosed compositions.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: June 18, 2002
    Assignee: 3D Systems, Inc.
    Inventors: Loc V. Bui, Vu Doan, Kelly Kwo
  • Phase change solid imaging material
    Patent number: 6395811
    Abstract: A component to control the viscosity of phase change material formulations is made by reacting selected nucleophiles, including fatty acid/alcohol reactants with an isocyanate, is disclosed. The addition of the isocyanate and the different nucleophiles will create a viscosity modifying component of low viscosity that can be formulated with higher molecular weight polyamide resins to achieve increased toughness in phase change solid imaging materials and carrier compositions used to make phase change ink jet inks.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: May 28, 2002
    Assignee: 3D Systems, Inc.
    Inventors: My T. Nguyen, Vu Doan, Kelly Kwo, Loc V. Bui
  • Compositions and methods for selective deposition modeling
    Patent number: 6132665
    Abstract: Phase change compositions that are solid at ambient temperature and liquid at an elevated temperature above ambient temperature are disclosed for advantageous use in selective deposition modeling methods for building three-dimensional objects. A phase change composition according to the disclosed invention is a semi-crystalline component mixture having a freezing point of at least about 68.degree. C., a melting point of at least about 88.degree. C. and a viscosity of about 13 centipoise at 135.degree. C. The composition includes a plurality of waxes having a broad melting point range and molecular weight range. Three-dimensional objects having minimal curl, delamination and stress cracks can be produced at a faster rate than heretofore known by using selective deposition modeling techniques employing the disclosed compositions.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: October 17, 2000
    Assignee: 3D Systems, Inc.
    Inventors: Loc V. Bui, Vu Doan, Kelly Kwo