Patents by Inventor Yosuke Egawa

Yosuke Egawa 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).

  • Biodegradable laminate sheet and molded item from biodegradable laminate sheet
    Patent number: 7320773
    Abstract: A biodegradable laminate sheet having as its object to provide a formed body superior in heat resistance, shock resistance, transparency and formability, and having non-stretched polylactic acid-family resin layer of which the crystallinity is 20% or less, and a layer comprising a biodegradable resin other than a polylactic acid-family resin.
    Type: Grant
    Filed: July 10, 2003
    Date of Patent: January 22, 2008
    Assignee: Mitsubishi Plastics, Inc.
    Inventor: Yosuke Egawa
  • Biodegradable laminated sheet
    Patent number: 7235287
    Abstract: The biodegradable sheet is a laminated sheet including at least two layers. Each of the layers forming the laminated sheet is a resin composition comprising 75 to 25% by mass of a polylactic acid resin, and 25 to 75% by mass of a polyester resin having a glass transition temperature not exceeding 0 degrees C. and a melting point higher than the glass transition temperature of the polylactic acid resin, and not exceeding the melting point of the polylactic acid resin, based on 100 mass percent of the total amount of the polylactic acid resin and the polyester resin. The D-lactic acid content of the polylactic acid resin contained in one layer, and the D-lactic acid content of the polylactic acid resin in the other layer are determined to satisfy a predetermined relationship. The laminated sheet is subjected to crystallization treatment.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: June 26, 2007
    Assignee: Mitsubishi Plastics, Inc.
    Inventor: Yosuke Egawa
  • Biodegradable laminated sheet
    Publication number: 20060286373
    Abstract: The biodegradable sheet is a laminated sheet including at least two layers. Each of the layers forming the laminated sheet is a resin composition comprising 75 to 25% by mass of a polylactic acid resin, and 25 to 75% by mass of a polyester resin having a glass transition temperature not exceeding 0 degrees C. and a melting point higher than the glass transition temperature of the polylactic acid resin, and not exceeding the melting point of the polylactic acid resin, based on 100 mass percent of the total amount of the polylactic acid resin and the polyester resin. The D-lactic acid content of the polylactic acid resin contained in one layer, and the D-lactic acid content of the polylactic acid resin in the other layer are determined to satisfy a predetermined relationship. The laminated sheet is subjected to crystallization treatment.
    Type: Application
    Filed: September 29, 2004
    Publication date: December 21, 2006
    Applicant: Mitsubishi Plastics, Inc.
    Inventor: Yosuke Egawa
  • Biodegradable laminate sheet and molded item from biodegradable laminate sheet
    Publication number: 20060040119
    Abstract: A biodegradable laminate sheet having as its object to provide a formed body superior in heat resistance, shock resistance, transparency and formability, and having non-stretched polylactic acid-family resin layer of which the crystallinity is 20% or less, and a layer comprising a biodegradable resin other than a polylactic acid-family resin.
    Type: Application
    Filed: July 10, 2003
    Publication date: February 23, 2006
    Inventor: Yosuke Egawa
  • Biodegradable sheet, molded object obtained from the sheet, and process for producing the molded object
    Publication number: 20050244606
    Abstract: A biodegradable sheet that causes no environmental problems, has excellent heat resistance and impact resistance, and is capable of forming deep-drawn molded article and blister molded article having a complicated shape. The biodegradable sheet comprises a resin composition containing 75 to 25 mass % of a polylactic acid resin and 25 to 75 mass % of a polyester having a glass transition temperature of 0° C. or less and a melting point higher than the glass transition temperature of the polylactic acid resin based on total 100 mass %, and the polylactic acid resin in the sheet has a degree of crystallization of 45% or less. The method for producing a molded article from the biodegradable sheet includes the step of molding the biodegradable sheet at a temperature not lower than the melting point of the aliphatic polyester and lower than a temperature by 30° C. higher than the melting point of the polyester.
    Type: Application
    Filed: July 7, 2003
    Publication date: November 3, 2005
    Applicant: Mitsubishi Plastics Inc.
    Inventor: Yosuke Egawa
  • Plastic filter for a photograph developing apparatus
    Patent number: 6180015
    Abstract: A plastic filter for a photograph developing apparatus, which is obtained by sinter-forming a thermoplastic material and which has a porosity of from 30 to 60 vol %, a filtration precision of a level capable of capturing foreign matters of at least 30 &mgr;m, and a pressure loss of at most 20 mmAq at a dry air flow rate of 1 m3/m2·min.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: January 30, 2001
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Yosuke Egawa, Hiroharu Masano, Kanji Ueyama
  • Porous plastic filter and process for its production
    Patent number: 5804074
    Abstract: A porous plastic filter for separating fine particles, which is obtained by sinter-forming particles of thermoplastic material, wherein the contact angle to water of at least one surface of the porous plastic filter is at least 60.degree., preferably at least 90.degree., and at least a thermoplastic material having an average particle size within a range of from 5 to 90 .mu.m, is used.
    Type: Grant
    Filed: May 8, 1996
    Date of Patent: September 8, 1998
    Assignee: Mitsubishi Plastics, Inc.
    Inventors: Yoshimi Takiguchi, Yosuke Egawa, Takayuki Watanabe, Hiroharu Masano