Patents by Inventor Hong J. Zhang

Hong J. 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).

  • Contact lens cleaning and wetting solutions containing a non-amine polyethyleneocy adduct having a HLB value of at least about 18, a surface active agent having a HLB of less than 18, and wetting agent
    Patent number: 5773396
    Abstract: A composition for cleaning and wetting contact lenses comprising a non-amine polyethylenoxide-containing copolymeric material having a hydrophilic-lipophile balance (HLB) of at least about 18, a surface active agent having cleaning activity for contact lens deposits and having HLB values of less than 18, and a wetting agent. Preferred embodiments of the present invention include those having from about 0.001 to about 10 weight percent of a non-amine polyethyleneoxy-containing materials, particularly those selected from: ethoxylated glucose derivatives, ethoxylated ethers of sorbitol, copolymers comprising ethyleneoxy and propyleneoxy monomeric units, and mixtures thereof. Preferred embodiments further include from about 0.001 to about 5 weight percent of the surface active agent and from about 0.1 to about 10 weight percent of a wetting agent selected from: cellulosic materials, silicone polymers containing an alkyleneoxide side chain, polyvinyl alcohols, polyvinyl pyrrolidones, and mixtures thereof.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: June 30, 1998
    Assignee: Polymer Technology Corporation
    Inventors: Hong J. Zhang, Edward J. Ellis, Stanley J. Wrobel, Chimpiramma Potini
  • System for automatic video segmentation and key frame extraction for video sequences having both sharp and gradual transitions
    Patent number: 5635982
    Abstract: An automatic video content parser for parsing video shots such that they are represented in their native media and retrievable based on their visual contents. This system provides methods for temporal segmentation of video sequences into individual camera shots using a novel twin-comparison method. The method is capable of detecting both camera shots implemented by sharp break and gradual transitions implemented by special editing techniques, including dissolve, wipe, fade-in and fade-out; and content-based key frame selection of individual shots by analyzing the temporal variation of video content and selecting a key frame once the difference of content between the current frame and a preceding selected key frame exceeds a set of preselected thresholds.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: June 3, 1997
    Inventors: Hong J. Zhang, Jian H. Wu, Stephen W. Smoliar
  • Composition for cleaning and wetting contact lenses
    Patent number: 5604189
    Abstract: A composition for cleaning and wetting contact lenses comprises a polyethyleneoxide-containing material having a hydrophile-lipophile balance (HLB) of at least about 18, a surface active agent having cleaning activity for contact lens deposits, and a wetting agent.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 18, 1997
    Inventors: Hong J. Zhang, Edward J. Ellis, Stanley J. Wrobel, Chimpiramma Potini
  • Composition for cleaning and wetting contact lenses
    Patent number: 5500144
    Abstract: Compositions for the care of contact lenses include a silicone polymer containing an alkyleneoxide side chain.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: March 19, 1996
    Assignee: Polymer Technology Corporation
    Inventors: Chimpiramma Potini, Stanley J. Wrobel, Hong J. Zhang, Edward J. Ellis