Patents by Inventor George Chu

George Chu 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).

  • Patent number: 4600533
    Abstract: A process for preparing collagen membranes useful in tissue repair, and wound healing and related membranous implant materials useful in both hard and soft tissue applications is disclosed. The resulting membranes and materials have properties which can be varied as desired to suit intended use. Variation results from altering the precise conditions of formation of the membrane or of related fibers and solids. The process comprises first forming a gel from solubilized collagen, followed by converting the gel into a one-, two- or three-dimensional membranous solid form. This conversion is performed either by applying pressure to the gel, or by disrupting the gel and separating the resulting precipitate for casting.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: July 15, 1986
    Assignee: Collagen Corporation
    Inventor: George Chu
  • Patent number: 4557764
    Abstract: A collagen preparation having unique properties of elasticity and malleability which is associated with a microscopic structure having an intertwining rope-like characteristic, and a process for preparing same are disclosed. The collagen thus formed is the second nucleation product obtained upon incubation of a supernatant from a quick harvested first stage nucleation product.
    Type: Grant
    Filed: September 5, 1984
    Date of Patent: December 10, 1985
    Assignee: Collagen Corporation
    Inventor: George Chu
  • Patent number: 4501306
    Abstract: An automatic syringe filling system includes a pump for supplying liquid under pressure to a manifold that distributes the liquid to each of a plurality of syringes. Microswitches disposed at predetermined positions detect when the plunger of each syringe connected to the manifold has been extended a particular distance determined by the desired fill volume. When all of the plungers are extended this distance, the supply of liquid to the manifold is discontinued by closing a valve and deactuating the pump.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: February 26, 1985
    Assignee: Collagen Corporation
    Inventors: George Chu, Sharon Casella