Patents by Inventor Minoru Takane

Minoru Takane 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).

  • Process for producing polypropylene laminated film
    Patent number: 6001293
    Abstract: A polypropylene laminated film containing a crystalline polypropylene layer and, laminated on at least one side of the layer of the crystalline polypropylene, a layer of a copolymer of propylene and at least one .alpha.-olefin of from 4 to 10 carbon atoms having a specific composition, melt flow rate and molecular weight distribution in which the .alpha.-olefin content in the cold xylene soluble portion of the random copolymer is less than 1.7 times the .alpha.-olefin content in the copolymer and the random copolymer satisfies the mathematical expression,B.ltoreq.1.05A-10,wherein A is a weight percentage of the content of said at least one .alpha.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: December 14, 1999
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Kazuki Wakamatsu, Junichi Kimura, Makoto Satoh, Yoichi Obata, Minoru Takane
  • Polypropylene laminated film
    Patent number: 5773129
    Abstract: A polypropylene laminated film containing a crystalline polypropylene layer and, laminated on at least one side of the layer of the crystalline polypropylene, a layer of a copolymer of propylene and at least one .alpha.-olefin of from 4 to 10 carbon atoms having a specific composition, melt flow rate and molecular weight distribution in which the .alpha.-olefin content in the cold xylene soluble portion of the random copolymer is less than 1.7 times the .alpha.-olefin content in the copolymer and the random copolymer satisfies the mathematical expression,B.ltoreq.1.05A-10,wherein A is a weight percentage of the content of said at least one .alpha.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: June 30, 1998
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kazuki Wakamatsu, Junichi Kimura, Makoto Satoh, Yoichi Obata, Minoru Takane
  • Polypropylene composition and stretched film thereof
    Patent number: 5635557
    Abstract: A polypropylene composition which contains a polypropylene and one or more ingredients selected from an antistatic agent and a surface-treated or untreated fine powdery silica gives a propylene stretched film having a well-balanced transparency, slip property and blocking resistance.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: June 3, 1997
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Junichi Kimura, Minoru Takane, Yoichi Obata, Hiroyuki Tanimura
  • Ethylene-.alpha.-olefin copolymer and process for producing the same
    Patent number: 5082908
    Abstract: An ethylene-.alpha.-olefin copolymer is disclosed, which comprises ethylene and an .alpha.-olefin having from 3 to 10 carbon atoms, has an ethylene/.alpha.-olefin molar ratio of from 88/12 to 98/2, and which has a number average molecular weight of from 35,000 to 80,000 and a weight average molecular weight/number average molecular weight ratio of from 1.8/1 to 3.0/1 as determined by gel permeation chromatography. A process for producing the ethylene-.alpha.-olefin copolymer is also disclosed. The ethylene-.alpha.-olefin copolymer exhibits excellent transparency and excellent low-temperature heat-sealing properties. The process is advantageous from the standpoint of equipment, energy and cost.
    Type: Grant
    Filed: June 8, 1989
    Date of Patent: January 21, 1992
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Akio Imai, Kiyoyuki Sugimori, Keisaku Yamamoto, Minoru Takane