Patents by Inventor Zhiwen Yao

Zhiwen Yao 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: 11944721
    Abstract: A nerve conduit loaded with adipose-derived stem cells and a preparation method thereof are provided. The preparation method includes: S1, adding polycaprolactone and polyvinylpyrrolidone into a binary organic solvent, performing ultrasonic treatment, and then adding reduced graphene oxide nanoparticles to obtain a spinning solution; S2, electrospinning with the spinning solution and then washing for several times to obtain a semi-finished conduit product; and S3, injecting a cell mixture into the semi-finished conduit product to obtain the nerve conduit. A fiber surface of the nerve conduit has groove structures, and thus a specific surface area and cell adhesion sites are increased, and adhesion and proliferation of cells are facilitated.
    Type: Grant
    Filed: April 22, 2023
    Date of Patent: April 2, 2024
    Assignee: SHANGHAI SIXTH PEOPLE'S HOSPITAL
    Inventors: Yun Qian, Cunyi Fan, Xiangyun Yao, Zhiwen Yan, Lingchi Kong, Xu Wang
  • Patent number: 6749868
    Abstract: In accordance with the present invention, there are provided compositions and methods useful for the in vivo delivery of substantially water insoluble pharmacologically active agents (such as the anticancer drug paclitaxel) in which the pharmacologically active agent is delivered in the form of suspended particles coated with protein (which acts as a stabilizing agent). In particular, protein and pharmacologically active agent in a biocompatible dispersing medium are subjected to high shear, in the absence of any conventional surfactants, and also in the absence of any polymeric core material for the particles. The procedure yields particles with a diameter of less than about 1 micron. The use of specific composition and preparation conditions (e.g., addition of a polar solvent to the organic phase), and careful election of the proper organic phase and phase fraction, enables the reproducible production of unusually small nanoparticles of less than 200 nm diameter, which can be sterile-filtered.
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: June 15, 2004
    Assignee: American BioScience, Inc.
    Inventors: Neil P. Desai, Chunlin Tao, Andrew Yang, Leslie Louie, Zhiwen Yao, Patrick Soon-Shiong, Shlomo Magdassi
  • Patent number: 6528067
    Abstract: In accordance with the present invention, there are provided stabilized total nutrient admixture (TNA) compositions which are useful for the in vivo parenteral delivery of pharmacologically acceptable lipids or fats, as well as methods for the preparation thereof. In particular, the pharmacologically acceptable lipid or fat is contained within a protein walled shell. In a particular embodiment of the invention, a TNA composition using human serum albumin (HSA) as a stabilizer has been prepared as a convenient three-in-one formulation (i.e., containing a fat emulsion, dextrose, and amino acids plus electrolytes). This “three-in-one” formulation can be prepared in liquid form or in dry form (comprising submicron-sized nanoparticles). The dried material is stable, even under long term storage, and is easily reconstituted immediately before use by simply adding sterile water (with or without vitamin supplementation) This serves to rehydrate the powder into a TNA suitable for injection.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: March 4, 2003
    Assignee: American Bioscience, Inc.
    Inventors: Shlomo Magdassi, Andrew Yang, Chunlin Tao, Neil P. Desai, Zhiwen Yao, Patrick Soon-Shiong
  • Patent number: 5997904
    Abstract: In accordance with the present invention, there are provided stabilized total nutrient admixture (TNA) compositions which are useful for the in vivo parenteral delivery of pharmacologically acceptable lipids or fats, as well as methods for the preparation thereof. In particular, the pharmacologically acceptable lipid or fat is contained within a protein walled shell. In a particular embodiment of the invention, a TNA composition using human serum albumin (HSA) as a stabilizer has been prepared as a convenient three-in-one formulation (i.e., containing a fat emulsion, dextrose, and amino acids plus electrolytes). This "three-in-one" formulation can be prepared in liquid form or in dry form (comprising submicron-sized nanoparticles). The dried material is stable, even under long term storage, and is easily reconstituted immediately before use by simply adding sterile water (with or without vitamin supplementation). This serves to rehydrate the powder into a TNA suitable for injection.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: December 7, 1999
    Assignee: American Bioscience, Inc.
    Inventors: Shlomo Magdassi, Andrew Yang, Chunlin Tao, Neil P. Desai, Zhiwen Yao, Patrick Soon-Shiong
  • Patent number: 5916596
    Abstract: In accordance with the present invention, there are provided compositions and methods useful for the in vivo delivery of substantially water insoluble pharmacologically active agents (such as the anticancer drug paclitaxel) in which the pharmacologically active agent is delivered in the form of suspended particles coated with protein (which acts as a stabilizing agent). In particular, protein and pharmacologically active agent in a biocompatible dispersing medium are subjected to high shear, in the absence of any conventional surfactants, and also in the absence of any polymeric core material for the particles. The procedure yields particles with a diameter of less than about 1 micron. The use of specific composition and preparation conditions (e.g., addition of a polar solvent to the organic phase), and careful selection of the proper organic phase and phase fraction, enables the reproducible production of unusually small nanoparticles of less than 200 nm diameter, which can be sterile-filtered.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 29, 1999
    Assignee: Vivorx Pharmaceuticals, Inc.
    Inventors: Neil P. Desai, Chunlin Tao, Andrew Yang, Leslie Louie, Tianli Zheng, Zhiwen Yao, Patrick Soon-Shiong, Shlomo Magdassi