Patents by Inventor Kevin Ka Leung Cheuk

Kevin Ka Leung Cheuk 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 mass production of tetrakis(p-nitrophenyl)porphyrins
    Patent number: 8901292
    Abstract: A method of mass production of tetrakis(p-nitrophenyl)porphyrins, by which successful isolation of the barely soluble product from meso-aryl nitration of tetraphenylporphyrin toward a remarkable yield of nearly 90% has been realized by means of a solid phase extraction technique. This is a simpler and more straight forward synthetic method, suitable production at an industrial scale with lower cost, shorter synthetic time and lower solvent consumption.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: December 2, 2014
    Assignee: The Hong Kong Polytechnic Univeristy
    Inventors: Kevin Ka Leung Cheuk, John Haozhong Xin, Priscilla Pui Sze Lee, Zhi Xue
  • Method Of Mass Production Of Tetrakis(P-Nitrophenyl)Porphyrins
    Publication number: 20130190486
    Abstract: A method of mass production of tetrakis(p-nitrophenyl)porphyrins, by which successful isolation of the barely soluble product from meso-aryl nitration of tetraphenylporphyrin toward a remarkable yield of nearly 90% has been realized by means of a solid phase extraction technique. This is a simpler and more straight forward synthetic method, suitable production at an industrial scale with lower cost, shorter synthetic time and lower solvent consumption.
    Type: Application
    Filed: January 20, 2012
    Publication date: July 25, 2013
    Inventors: Kevin Ka Leung Cheuk, John Haozhong Xin, Priscilla Pui Sze Lee, Zhi Xue