Patents by Inventor Raymond C. L. Chan

Raymond C. L. Chan 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).

  • Patent number: 5614275
    Abstract: A high-relief, resiliently flexible composite molded plastic product (21). The product (21) includes a relatively rigid injection molded core member (22) having a pair of oppositely facing core shoulders (26,27), and a plastic sleeve member (23) with sleeve shoulders (36,37) interengaged with the core shoulders (26,27). The sleeve member (23) is rotationally cast or molded from a plastisol dispersion having emulsion grade polyvinylchloride and suspension grade polyvinylchloride in a ratio of at least 3:1, and preferably 5:1, to produce substantial flexibility and to enable high-relief design features (46) to be molded into the sleeve member (23).
    Type: Grant
    Filed: July 28, 1995
    Date of Patent: March 25, 1997
    Inventor: Raymond C. L. Chan