Patents by Inventor Xi Zhang

Xi Zhang 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).

  • Publication number: 20040219175
    Abstract: The present invention relates to a temperature-sensitive thermogelling emulsion system for bioactive substances, consisting of a biodegradable temperature-sensitive aqueous phase polymer solution, and a pharmaceutically acceptable oil phase carrier, which embeds the bioactive substance. The oil phase carrier and the temperature-sensitive polymer solution are mixed mutually to produce the emulsion, and the emulsion is a liquid while the temperature is below the lower critical solution temperature (LCST) and reversibly transforms into a gel while the temperature is above said lower critical solution temperature. The emulsions are able to offer the controlled release without burst effect and afterward in a near zero order manner, as well as be non-invasively monitored post-implantation. The design of entrapment of the bioactive substances in the oily phase is also beneficial to preserve the bioactivity of the environment-sensitive substances.
    Type: Application
    Filed: December 31, 2003
    Publication date: November 4, 2004
    Applicant: Industrial Technology Research Institute
    Inventors: Pei Kan, Xi-Zhang Lin, Ming-Fa Hsieh, Ken-Yuan Chang
  • Patent number: 6795242
    Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first and second polarization orientation elements with first and second PBS elements are coupled to the first and second polarization orientation elements, respectively. The refraction elements include complementary Wollaston Prism elements or Rochon Prism elements. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, a half-wave plate formed using thin film coating techniques. The Faraday rotator elements are periodically poled in some embodiments using selective poling techniques to create oppositely oriented magnetic domains so that polarization rotations of 45° in both clockwise and counter-clockwise directions can be simultaneously achieved on the same magnetic garnet.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: September 21, 2004
    Assignee: Lightwaves 2020, Inc.
    Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou
  • Patent number: 6785431
    Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device according to the present invention includes a spatial walkoff plate (SWP) coupled on opposite ends to first and second polarization orientation elements. First and second polarization beam splitter (PBS) elements are coupled to the first and second polarization orientation elements, respectively. The PBS elements are formed using thin film coating techniques and each includes an array of port coupling regions for coupling to an array of input/output fiber port assemblies. The SWP may be formed using thin film coating techniques or cut from a birefringent single crystal. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, each also includes a wave plate formed using thin film coating techniques.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: August 31, 2004
    Assignee: Lightwaves 2020, Inc.
    Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou
  • Publication number: 20030147136
    Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device according to the present invention includes two refraction elements arranged opposite each other along a propagation axis and coupled on opposite ends to first and second polarization orientation elements with first and second polarization beam splitter (PBS) elements are coupled to the first and second polarization orientation elements, respectively. The refraction elements include complementary Wollaston Prism elements or complementary Rochon Prism elements. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, each also includes a half-wave plate formed using thin film coating techniques.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 7, 2003
    Applicant: Lightwaves 2020, Inc.
    Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou
  • Publication number: 20030147578
    Abstract: Miniature optical devices, including circulator array devices, are fabricated using thin film coating technology. A typical optical device according to the present invention includes a spatial walkoff plate (SWP) coupled on opposite ends to first and second polarization orientation elements. First and second polarization beam splitter (PBS) elements are coupled to the first and second polarization orientation elements, respectively. The PBS elements are formed using thin film coating techniques and each includes an array of port coupling regions for coupling to an array of input/output fiber port assemblies. The SWP may be formed using thin film coating techniques or cut from a birefringent single crystal. Each polarization orientation element includes a Faraday rotator element, and in some embodiments, each also includes a wave plate formed using thin film coating techniques.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 7, 2003
    Applicant: Lightwaves 2020, Inc.
    Inventors: Jing-Jong Pan, Ming Zhou, Hong-Xi Zhang, Feng-Qing Zhou