Patents by Inventor Imtiaz Rangwalla

Imtiaz Rangwalla 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).

  • Reactive silicone/alkylenimine barrier laminating adhesives and applications thereof
    Patent number: 6399171
    Abstract: The invention relates to a method of laminating two substrates by coating at least one side of a substrate with a laminating adhesive, bringing a coated side of said substrate into contact with a second substrate to form a three layer film, and treating said three layer film with a free radical initiator, wherein said laminating adhesive is formed by mixing an ethylenically unsaturated acid and a polyamine.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: June 4, 2002
    Assignees: Dow Corning Corporation, EG Technology Partners, L.P., UCB Films PLC, Star House
    Inventors: Patrick J. Merlin, Daniel Futter, John E. Wyman, Imtiaz Rangwalla, Gary Power, Karen Branch
  • Method of imbuing organic polymer films with improved gas impermeability characteristics and improved barrier coatings therefor
    Patent number: 5215822
    Abstract: This invention embraces a method of controlling the impermeability of an organic polymer film to gases such as oxygen, aroma, flavor and fragrance and the like to produce gas impermeable organic polymer films by coating with a mixture of a siloxane monomer with carboxylic acid in an alcohol solvent and evaporating the solvent to complete the formation of Si--O--Si bonds; and then polymerizing and grafting the coating, preferably by electron beam radiation, to the polymer film. Improved coated polymer films and formulation products therefor are also provided.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: June 1, 1993
    Assignees: Energy Sciences, Inc., Marjorie T. Wyman
    Inventors: John E. Wyman, Imtiaz Rangwalla