Patents by Inventor Catalin Roman

Catalin Roman 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: 20140183792
    Abstract: This novel technology relates to a freeze-form extrusion fabrication process for fabricating three-dimensional functionally gradient composite parts by extruding and mixing multiple aqueous pastes prior to depositing and freezing the mixed paste, layer by layer, using a computer controlled multi-extruder apparatus. Various aqueous pastes with low organic binder contents are first prepared. The extrusion of each different paste is coordinated through computer control, which mixes the pastes in any desired proportions prior to extrusion through and deposition according to a pre-programmed deposition path for each layer. The mixed paste is frozen immediately after deposition. A heating jacket may be used to prevent the pastes from freezing prior to deposition. The layer-by-layer fabrication process continues until an entire part has been fabricated.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 3, 2014
    Inventors: Ming C. Leu, Gregory E. Hilmas, Catalin Roman