Patents by Inventor Andrew Chwee Aun Wan

Andrew Chwee Aun Wan 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).

  • Method of preparing water swellable gel from chitin
    Patent number: 6025479
    Abstract: This invention relates to a method of preparing a form of chitin that has consistent shape in the dry form, is treated chemically such that it will swell when exposed to water to form a gel. The gel can be dried to give the dry form. The gel formation upon absorption/swelling in the presence of water and drying to give the dried form is reversible. The extent of swelling can be varied by suitably varying the chemical treatment.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: February 15, 2000
    Assignee: National University of Singapore
    Inventors: Eugene Khor, Andrew Chwee Aun Wan, Garth Winton Hastings
  • Method of preparing filler containing forms of chitin
    Patent number: 5821285
    Abstract: The method relates to the preparation of dry chitin forms of consistent shape that incorporates an advantageous additive such as fillers or reinforcement during the preparation process to give dry forms of chitin with consistent shape typically known as filler containing chitin or chitin composites.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: October 13, 1998
    Assignee: National University of Singapore
    Inventors: Eugene Khor, Andrew Chwee Aun Wan, Garth Winton Hastings