Patents by Inventor Theodore R. Kruger

Theodore R. Kruger 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).

  • Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations
    Patent number: 6179601
    Abstract: A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making high resolution objects utilizing low resolution materials which are limited by their inability to reliably form coatings of a desired thickness. The formation of coatings of such materials is limited to a Minimum Recoating Depth (MRD), when formed over entirely solidified laminae, which is thicker than the desired layer thickness or object resolution. Data manipulation techniques result in layers of material (and laminae) of the object being categorized as non-consecutive primary layers (laminae) and secondary layers (laminae) positioned intermediate to the primary layers (laminae).
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: January 30, 2001
    Assignee: 3D Systems, Inc.
    Inventors: Theodore R. Kruger, Chris R. Manners, Hop D. Nguyen
  • Simplified stereolithographic object formation methods of overcoming minimum recoating depth limitations
    Patent number: 5902538
    Abstract: A rapid prototyping and manufacturing (e.g. stereolithography) method and apparatus for making high resolution objects utilizing low resolution materials which are limited by their inability to reliably form coatings of a desired thickness. The formation of coatings of such materials is limited to a Minimum Recoating Depth (MRD), when formed over entirely solidified laminae, which is thicker than the desired layer thickness or object resolution. Data manipulation techniques result in layers of material (and laminae) of the object being categorized as non-consecutive primary layers (laminae) and secondary layers (laminae) positioned intermediate to the primary layers (laminae).
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: May 11, 1999
    Assignee: 3D Systems, Inc.
    Inventors: Theodore R. Kruger, Chris R. Manners, Hop D. Nguyen