Patents by Inventor Yuan Feng Liang

Yuan Feng Liang 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 of making a polyester or polyol
    Patent number: 6325945
    Abstract: This invention relates to an improved process for the treatment of aqueous waste stream containing aldehydes and ketones, in particular, alpha, beta-ethylenically unsaturated aldehydes and ketones, which can be rendered non-toxic to biological treatment systems by contacting the waste stream with organic polyamines and/or inorganic ammonium compounds at essentially ambient conditions.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: December 4, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph Varapadavil Kurian, Yuan Feng Liang
  • Treatment of aqueous aldehyde waste streams
    Patent number: 6277289
    Abstract: This invention relates to an improved process for the treatment of aqueous waste stream containing aldehydes and/or ketones, in particular, alpha, beta-ethylenically unsaturated aldehydes and ketones, which can be rendered non-toxic to biological treatment systems by contacting the waste stream with organic polyamines and/or inorganic ammonium compounds at essentially ambient conditions.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: August 21, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph Varapadavil Kurian, Yuan Feng Liang
  • Process of making a polyester or polyol
    Publication number: 20010011647
    Abstract: This invention relates to an improved process for the treatment of aqueous waste stream containing aldehydes and ketones, in particular, alpha, beta-ethylenically unsaturated aldehydes and ketones, which can be rendered non-toxic to biological treatment systems by contacting the waste stream with organic polyamines and/or inorganic ammonium compounds at essentially ambient conditions.
    Type: Application
    Filed: March 21, 2001
    Publication date: August 9, 2001
    Inventors: Joseph V. Kurian, Yuan Feng Liang
  • Nucleating agent for polyesters
    Patent number: 6245844
    Abstract: Disclosed are polyester polymer compositions containing sodium additives as nucleating agents. More specifically disclosed is the use of mono-sodium salts of dicarboxylic acids as nucleating agents.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: June 12, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph Varapadavil Kurian, Yuan Feng Liang