Patents Examined by Peter D. Mulchay
  • Process for preparing thermoplastic polyolefin resin articles of reduced hydrocarbon permeability
    Patent number: 5702786
    Abstract: A process is described for improving the hydrocarbon solvent impermeability of polyethylene resin based containers. The process employs a thermal profile during thermal molding, which creates a crystalline barrier adjacent one surface of the container. The barrier enhances impermeability of the container.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: December 30, 1997
    Assignee: Greif Bros. Corporation
    Inventor: Ronald T. Robichaud
  • Method for producing a polychloroprene latex
    Patent number: 5681891
    Abstract: A method for producing a polychloroprene latex, which comprises copolymerizing chloroprene and an ethylenically unsaturated carboxylic acid in the presence of a polyvinyl alcohol, wherein a glycol ether is also present during the copolymerization.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: October 28, 1997
    Assignees: Denki Kagaku Kogyo Kabushiki Kaisha, Konishi Co., Ltd.
    Inventors: Mikitoshi Satoh, Masao Koga, Shigeru Nagasawa, Kunihiko Asano, Toshiyuki Uenoyama, Kunihiro Onishi