Patents by Inventor Sum-Wing Tsui

Sum-Wing Tsui 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).

  • Adhesive
    Patent number: 7037968
    Abstract: An adhesive comprising: (a) 80 to 100% of a melt blend of 40 to 98% polyalphaolelin which has been grafted with 0 to 5% of at least 1 ethylenically unsaturated carboxylic acid or derivative thereof, (b) 2 to 60% of at least one copolymer of ethylene and vinyl acetate; (c) 0 to 20% of an opacifier; (d) optional further ingredients; wherein the total amount of components (a) and (b) is 80–100% of the composition and wherein the percentages of the components are selected to total 100%.
    Type: Grant
    Filed: January 29, 2002
    Date of Patent: May 2, 2006
    Assignee: Glucd LTD
    Inventors: Sum-Wing Tsui, Anthony Francis Johnson
  • Amorphous polypropylene based adhesive
    Patent number: 6677396
    Abstract: An adhesive composition comprises an amorphous polyalphaolefin, 50-90 wt %; a tackifier 10-40 wt %; a functionalised polypropylene trace-20 wt %; and optional further ingredients selected from stablisers, fillers and waxes; wherein the proportions of the amorphous polyalphaolefin, tackifier and functionalised polypropylene are selected to total 100%. A method of forming polypropylene packaging using the adhesive is also provided.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: January 13, 2004
    Assignee: Gluco Limited
    Inventors: Sum-Wing Tsui, Anthony Francis Johnson
  • Adhesive
    Publication number: 20030159775
    Abstract: An adhesive comprising: (a) 80 to 100% of a melt blend of 40 to 98% polyalphaolelin which has been grafted with 0 to 5% of at least 1 ethylenically unsaturated carboxylic acid or derivative thereof, (b) 2 to 60% of at least one copolymer of ethylene and vinyl acetate; (c) 0 to 20% of an opacifier; (d) optional further ingredients; wherein the total amount of components (a) and (b) is 80-100% of the composition and wherein the percentages of the components are selected to total 100%.
    Type: Application
    Filed: March 31, 2003
    Publication date: August 28, 2003
    Inventors: Sum-Wing Tsui, Anthony Francis Johnson
  • Amorphous polypropylene based adhesive
    Publication number: 20030105211
    Abstract: The present invention provides an adhesive composition comprising: an amorphous polyalphaolefin 50-90; a tackifier 10-40%; a functional polypropylene trace −20%; and optional further ingredients selected from stablisers, fillers and waxes; wherein the proportions of the amorphous polylphaolefin, tackifier and functionalised polypropylene are selected to total 100%. The invention also provides a method of forming polypropylene packaging by use of the adhesive.
    Type: Application
    Filed: December 23, 2002
    Publication date: June 5, 2003
    Inventors: Sum-Wing Tsui, Anthony Francis Johnson