Patents by Inventor Ray W. Y. Poon

Ray W. Y. Poon 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).

  • Surface treated shape memory materials and methods for making same
    Patent number: 7803234
    Abstract: The invention provides a method for making surface treated shape memory materials such as from NiTi alloy using plasma immersion ion implantation and deposition and related ion-beam and plasma-based techniques to alter the surface properties of those materials primarily for biomedical applications. The surfaces are treated with nitrogen, oxygen, and carbon, but become bio-inactive after implanted with other elements such as silicon.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: September 28, 2010
    Assignees: Versitech Limited
    Inventors: Kelvin W. K. Yeung, Ray W. Y. Poon, Paul Kim-Ho Chu, Kenneth M. C. Cheung, William W. Lu