Patents by Inventor Hai-Bo Wen

Hai-Bo Wen 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: 20030170378
    Abstract: The invention provides novel dental enamel inspired materials for biomedical and dental applications. The materials are apatite-like calcium phosphate complexes and may comprise apatite, octacalcium phosphate crystals, or mixtures thereof. In one embodiment, the materials (calcium phosphate coatings) are mixtures of crystals of apatite and its precursor, octacalcium phosphate, nucleated on a titanium surface. They are prepared using a chemical process leading to the formation of biological apatite which is similar to that found in natural bone and teeth. In one embodiment, the materials are prepared by placing a titanium substrate in a supersaturated calcifying solution containing native or purified recombinant amelogenins. The presence of the amelogenins modulates apatite crystal growth to mimic in vivo apatite crystal formation.
    Type: Application
    Filed: February 20, 2003
    Publication date: September 11, 2003
    Applicant: University of Southern California
    Inventors: Hai Bo Wen, Janet Moradian-Oldak
  • Patent number: 6344061
    Abstract: The invention provides an implantable device coated with a layer of calcium phosphate and optionally one or more biologically active substances such as growth factors, lipis, (lipo)polysaccharides, hormones, proteins, antibiotics or cytostatics. The device can be obtained by a nanotechnology process comprising subjecting a substrate to a surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm and subjecting the roughened surface to precipitation of calcium phosphate from a solution containing calcium and phosphate ions with optional coprepitation of the biologically active substance.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: February 5, 2002
    Assignee: IsoTis N.V.
    Inventors: Eugenia Ribeiro de Sousa Fidalgo Leitao, Joost Dick De Bruijn, Hai-Bo Wen, Klaas De Groot
  • Patent number: 6143948
    Abstract: The invention provides an implantable device coated with a layer of calcium phosphate and optionally one or more biologically active substances such as growth factors, lipids, (lipo)polysaccharides, hormones, proteins, antibiotics or cytostatics. The device can be obtained by a nanotechnology process comprising subjecting a substrate to a surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm and subjecting the roughened surface to precipitation of calcium phosphate from a solution containing calcium and phosphate ions with optional coprecipitation of the biologically active substance.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: November 7, 2000
    Assignee: IsoTis B.V.
    Inventors: Eugenia Ribeiro de Sousa Fidalgo Leitao, Joost Dick De Bruijn, Hai-Bo Wen, Klaas De Groot
  • Patent number: 6136369
    Abstract: The invention provides an implantable device coated with a layer of calcium phosphate and optionally one or more biologically active substances such as growth factors, lipis, (lipo)polysaccharides, hormones, proteins, antibiotics or cytostatics. The device can be obtained by a nanotechnology process comprising subjecting a substrate to a surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm and subjecting the roughened surface to precipitation of calcium phosphate from a solution containing calcium and phosphate ions with optional coprepitation of the biologically active substance.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: October 24, 2000
    Assignee: IsoTis B.V.
    Inventors: Eugenia Ribeiro de Sousa Fidalgo Leitao, Joost Dick De Bruijn, Hai-Bo Wen, Klaas De Groot