Patents by Inventor Qi-Bin Bao

Qi-Bin Bao 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).

  • Hydrogel bead intervertebral disc nucleus
    Patent number: 5192326
    Abstract: A prosthetic nucleus for implantation in the disc space after removal of a damaged or degenerated nucleus is formed from a multiplicity of hydrogel beads having a water content of at least 30%. The beads are covered by a semi-permeable membrane. The membrane has porosity less than the size of the beads to thereby retain the beads therein but permit fluids to flow in and out of the prosthetic nucleus.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: March 9, 1993
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Qi-Bin Bao, Paul A. Higham
  • Colored lens
    Patent number: 5120121
    Abstract: A molded plastic cosmetic contact lens made in a repetitive manner comprising a cosmetic pattern of clustered networks of interconnected thin colored lines radiating from and about the periphery of the pupil portion in a direction inclined towards and in contact with the periphery of the iris portion and residing within the iris portion. The lens can be made by molding in a manner that the cosmetic pattern becomes part of the body of the lens.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: June 9, 1992
    Assignee: Allergan, Inc.
    Inventors: David L. Rawlings, Qi-Bin Bao
  • Hydrogel intervertebral disc nucleus
    Patent number: 5047055
    Abstract: A prosthetic nucleus for a vertebral disc is made of a hydrogel material. The hydrogel prosthetic nucleus has a shape generally conforming to the natural nucleus pulposus. The hydrogel has a water content of at least 30% and has a compressive strength of 4MNm.sup.-2 or greater. When the hydrogel material is dehydrated, it has a dimension of less than half of that of the hydrated hydrogel nucleus. The prosthetic nucleus may be formed of two or more pieces of hydrogel material which pieces, when combined, have a shape generally conforming to the natural nucleus.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: September 10, 1991
    Assignee: Pfizer Hospital Products Group, Inc.
    Inventors: Qi-Bin Bao, Paul A. Higham
  • Method of molding a colored contact lens
    Patent number: 5034166
    Abstract: A process for the manufacture of a molded contact lens containing a transparent central visual region circumscribed by a colored iris portion which comprisesa. coating a colored liquid which is either curable or thermoplastic in a mold for making a contact lens onto a surface thereof where the iris portion of the lens is formed to produce a colored film thereon which film contains a surface exposed to the interior of the mold and a surface in contact with the mold,b. charging the mold with the resin used to form the body of the lens while maintaining the colored film in the iris portion and configuring the resin about the colored film whereby the surface of the film becomes integral with the body of the lens and the surface of the film becomes part of the outer surface of the lens when the molded lens is removed from the mold.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: July 23, 1991
    Assignee: Allergan, Inc.
    Inventors: David L. Rawlings, Qi-Bin Bao, Patrick Chen