Patents by Inventor Tetsuo Aizawa

Tetsuo Aizawa 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).

  • Embossed sheet and a method of producing a laminate including that sheet
    Patent number: 6136414
    Abstract: An embossed sheet which is excellent in embossing properties, whitening resistance and transparency, can be prepared by using a resin composition containing specific ratios of (A) polypropylene having a specific melting point of 125.degree. C. or higher, (B) ethylene-.alpha.-olefin copolymer having specific properties and (C) random copolymer of aromatic vinyl compound and conjugated diene compound having specific properties. Further, the present invention provides the laminates which is made using the above embossed sheet and the method for producing them.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: October 24, 2000
    Assignees: Toppan Printing Co., Ltd., Nippon Petrochemicals Company, Limited
    Inventors: Tetsuo Aizawa, Masahiro Yamazoe, Ikuma Nishimura, Kazuhiko Ohta, Toshio Inoue, Tokuhito Suzuki
  • Laminate of a base material and an embossed sheet
    Patent number: 5928762
    Abstract: An embossed sheet which is excellent in embossing properties, whitening resistance and transparency, can be prepared by using a resin composition containing specific ratios of (A) polypropylene having a specific melting point of 125.degree. C. or higher, (B) ethylene-.alpha.-olefin copolymer having specific properties and (C) random copolymer of aromatic vinyl compound and conjugated diene compound having specific properties. Further, the present invention provides the laminates which is made using the above embossed sheet and the method for producing them.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: July 27, 1999
    Assignees: Toppan Printing Co., Ltd, Nippon Petrochemicals Company, Limited
    Inventors: Tetsuo Aizawa, Masahiro Yamazoe, Ikuma Nishimura, Kazuhiko Ohta, Toshio Inoue, Tokuhito Suzuki
  • Method for the manufacture of a composite laminate
    Patent number: 5498385
    Abstract: A biodegradable composite laminate for the manufacture of packaging containers is provided. The composite laminate includes a straight-chain, biodegradable 3-hydroxybutyric acid/3-hydroxyvaleric acid copolyester in a thin film which has been laminated on at least one surface of a sheet-like substrate. A polymeric blend of a poly-.epsilon.-caprolactone with the straight-chain copolyester may be employed in the place of the straight-chain copolyester alone. The method for the manufacture thereof is also provided.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: March 12, 1996
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Kazuya Yabusa, Takeo Kato, Tetsuo Aizawa, Masayuki Taniguchi
  • Composite laminate
    Patent number: 5409772
    Abstract: A biodegradable composite laminate for the manufacture of packaging containers is provided. The composite laminate comprises a straight-chain, biodegradable 3-hydroxybutyric acid 3-hydroxyvaleric acid copolyester in a thin film which has been laminated on at least one surface of a sheet-like substrate.A polymeric blend of a poly-.epsilon.-caprolactone with the straight-chain copolyester may be employed in the place of the straight-chain copolyester alone.The method for the manufacture thereof is also provided.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: April 25, 1995
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Kazuya Yabusa, Takeo Kato, Tetsuo Aizawa, Masayuki Taniguchi