Patents by Inventor Rui Qing Qian

Rui Qing Qian 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).

  • METHOD OF USING AND PRODUCING TROPOELASTIN AND TROPOELASTIN BIOMATERIALS
    Publication number: 20090169593
    Abstract: A device implantable within a human body, and a method for producing the device, are provided. The device comprises a biocompatible coating on at least a portion of an outer surface of a substrate. The biocompatible coating comprises tropoelastin. A biocompatible coating is formed in situ on the outer surface of the substrate.
    Type: Application
    Filed: October 19, 2006
    Publication date: July 2, 2009
    Applicants: BIOMEDICAL RESEARCH SERVICES, INC., PROVIDENCE HEALTH SYSTEMS - Oregon, an Oregon Nonprofit Corporation
    Inventors: Kenton W. Gregory, Robert Glanville, Hooi-Sung Kim, Rui-Qing Qian, Carl Wamser
  • Methods for purifying chitosan
    Patent number: 6896809
    Abstract: One method for purifying a chitosan starting material includes contacting it with at least one treatment agent selected from a protein-complexing agent, a metal-chelating agent, and a metal-complexing agent under pH conditions effective for forming a water insoluble chitosan precipitate and at least one water soluble material selected from a water soluble protein complex, a water soluble metal chelate, and a water soluble metal complex. Another variant involves solubilizing the chitosan starting material in an aqueous solution to produce an intermediate chitosan material. The intermediate chitosan material is contacted with a deproteinization agent and/or a demetallization agent under pH conditions effective for forming a water insoluble chitosan precipitate and at least one water soluble material that includes the pre-existing impurity. In both methods, the water insoluble chitosan precipitate and the water soluble material are separated resulting in a purified chitosan material.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: May 24, 2005
    Assignee: Providence Health System - Oregon
    Inventors: Rui Qing Qian, Robert W. Glanville
  • Methods for purifying chitosan
    Publication number: 20040118778
    Abstract: One method for purifying a chitosan starting material includes contacting it with at least one treatment agent selected from a protein-complexing agent, a metal-chelating agent, and a metal-complexing agent under pH conditions effective for forming a water insoluble chitosan precipitate and at least one water soluble material selected from a water soluble protein complex, a water soluble metal chelate, and a water soluble metal complex. Another variant involves solubilizing the chitosan starting material in an aqueous solution to produce an intermediate chitosan material. The intermediate chitosan material is contacted with a deproteinization agent and/or a demetallization agent under pH conditions effective for forming a water insoluble chitosan precipitate and at least one water soluble material that includes the pre-existing impurity. In both methods, the water insoluble chitosan precipitate and the water soluble material are separated resulting in a purified chitosan material.
    Type: Application
    Filed: December 20, 2002
    Publication date: June 24, 2004
    Applicant: Providence Health System
    Inventors: Rui Qing Qian, Robert W. Glanville