Patents by Inventor Sin Man Lee

Sin Man Lee 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).

  • Time temperature indicator by chromatography and photonic lattice changes
    Patent number: 9546912
    Abstract: A time-temperature indicator (TTI) uses polymer hardening properties to “set” or retain indications of temperature history. The TTI includes a mesh layer affixed to a thermo-conductive adhesive layer and a photonic crystal patterned film affixed to the mesh layer. The photonic crystal shows a property of bandgap shift vs temperature and responds to a predetermined range of temperatures to provide a visible indication of the range of temperatures. A hardener pouch is affixed to one end of the mesh layer and releases hardener in response to an initiating event, so that the photonic crystal material responds to the hardener by presenting a fixed state.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: January 17, 2017
    Assignee: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Po Shan Chan, Kai Ming Yeung, Mui Chan, Sin Man Lee