Patents by Inventor Cheng Xun Lu

Cheng Xun Lu 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).

  • Process for the preparation of aqueous dispersions of particles of water-soluble polymers and the particles obtained
    Patent number: 6544503
    Abstract: The invention is a process for the preparation of crosslinked water-swellable polymer particles. First, an aqueous polymer solution containing a water-soluble polymer having at least one functional group or charge, is combined with aqueous medium. The aqueous polymer solution is then mixed under moderate agitation with an oil medium and an emulsifier to form an emulsion of droplets of the water-soluble polymer. A crosslinking agent capable of crosslinking the functional groups and/or charges in the water-soluble polymer is then added to the emulsion to form crosslinked water-swellable polymer particles. The invention also includes the particles formed by the process and aqueous dispersions containing the particles which are useful for administering to an individual. The particles of the invention are useful for implantation, soft tissue augmentation, and scaffolding to promote cell growth.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: April 8, 2003
    Assignees: C. R. Bard, Inc., Lehigh University
    Inventors: John W. Vanderhoff, Cheng Xun Lu, Clarence C. Lee, Chi-Chun Tsai
  • Process for the preparation of aqueous dispersions of particles of water-soluble polymers and the particles obtained
    Patent number: 6214331
    Abstract: The invention is a process for the preparation of crosslinked water-swellable polymer particles. First, an aqueous polymer solution containing a water-soluble polymer having at least one functional group or charge, is combined with aqueous medium. The aqueous polymer solution is then mixed under moderate agitation with an oil medium and an emulsifier to form an emulsion of droplets of the water-soluble polymer. A crosslinking agent capable of crosslinking the functional groups and/or charges in the water-soluble polymer is then added to the emulsion to form crosslinked water-swellable polymer particles. The invention also includes the particles formed by the process and aqueous dispersions containing the particles which are useful for administering to an individual. The particles of the invention are useful for implantation, soft tissue augmentation, and scaffolding to promote cell growth.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: April 10, 2001
    Assignees: C. R. Bard, Inc., Lehigh University
    Inventors: John W. Vanderhoff, Cheng Xun Lu, Clarence C. Lee, Chi-Chun Tsai