Patents by Inventor Masayuki Imafuku

Masayuki Imafuku 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).

  • Patent number: 6929985
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, a semiconductor production apparatus or the like.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: August 16, 2005
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 6613835
    Abstract: Materials not releasing gaseous organic materials during use are used as a dry-type sealing material such as a gasket disposed upon mounting an air filter to an opening of a ceiling or the like, a wet-type sealing material filled and used in a gap for connecting wall materials or partitionings, a vinyl chloride sheet or a vinyl chloride cloth as a facing material for walls and floors. Specifically, a carboxylic acid ester having a molecular weight of not less than 400 is used as a plasticizer, a phenolic compound having a molecular weight of not less 300 is used as an antioxidant, an aliphatic hydrocarbon having not less than 19 carbon atoms (for example, microcrystalline wax) is used as a lubricant, and an alkylamine ethylene oxide adduct having a molecular weight of not less than 350 is used as an antistatic agent.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: September 2, 2003
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Publication number: 20030000187
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, a semiconductor production apparatus or the like.
    Type: Application
    Filed: March 8, 2002
    Publication date: January 2, 2003
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 6471740
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, a semiconductor production apparatus or the like.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: October 29, 2002
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 6337365
    Abstract: An electronic/electric part used in a clean room in which the atmosphere is controlled to process a substrate in a semiconductor device industry, which contains a resin base material and additives added to the resin base material. The additives contain one or more materials selected from the group consisting of an anti-electrostatic agent made of a nonionic compound of a molecular weight of 350 or higher, an anti-oxidizing agent made of a phenolic compound of a molecular weight of 300 or higher, a lubricant, a plasticizer, a fire retardant, and a water repellent. The additives hardly releases gaseous organic substances from the resin base material under a condition where the part is used.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: January 8, 2002
    Assignees: Tokyo Electron Limited, Taisei Corporation
    Inventors: Takenobu Matsuo, Tsuyoshi Wakabayashi, Misako Saito, Sadao Kobayashi, Yoshihide Wakayama, Masayuki Imafuku
  • Patent number: 6293982
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, in a semiconductor production apparatus or in the like.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: September 25, 2001
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Publication number: 20010000375
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, a semiconductor production apparatus or the like.
    Type: Application
    Filed: December 13, 2000
    Publication date: April 26, 2001
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 6155922
    Abstract: Materials not releasing gaseous organic materials during use are used as a dry-type sealing material such as a gasket disposed upon mounting an air filter to an opening of a ceiling or the like, a wet-type sealing material filled and used in a gap for connecting wall materials or partitionings, a vinyl chloride sheet or a vinyl chloride cloth as a facing material for walls and floors. Specifically, a carboxylic acid ester having a molecular weight of not less than 400 is used as a plasticizer, a phenolic compound having a molecular weight of not less 300 is used as an antioxidant, an aliphatic hydrocarbon having not less than 19 carbon atoms (for example, microcrystalline wax) is used as a lubricant, and an alkylamine ethylene oxide adduct having a molecular weight of not less than 350 is used as an antistatic agent.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: December 5, 2000
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 6106586
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, a semiconductor production apparatus or the like.
    Type: Grant
    Filed: September 24, 1999
    Date of Patent: August 22, 2000
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 6077894
    Abstract: There are instruments used for handling a substrate in a clean room at room temperature and atmospheric pressure, which contain a resin base and at least one additive selected from the group consisting of a lubricant, a plasticizer, an anti-oxidizing agent and an antistatic agent, and the additives do not generate gaseous organic material compound under conditions of room temperature and atmospheric pressure.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: June 20, 2000
    Assignees: Tokyo Electron Limited, Taisei Corporation
    Inventors: Misako Saito, Takenobu Matsuo, Tsuyoshi Wakabayashi, Sadao Kobayashi, Yoshihide Wakayama, Masayuki Imafuku
  • Patent number: 5997598
    Abstract: A material not releasing gaseous organic substances during use is used as a filter medium and a sealing material for tightly sealing between the medium and a frame. Specifically, a synthetic paraffin not containing an aliphatic hydrocarbon having not more than 19 carbon atoms or less is used as a non-silicone type water repellent contained in a treatment agent for forming fibers into a cloth-like filter medium. A carboxylic acid ester having 400 or more molecular weight is used as a plasticizer and a phenolic compound having 300 or more molecular weight is used as an antioxidant to be added to the treatment agent and the sealing material. This enables that the gaseous organic substances are not present in a clean room, a semiconductor production apparatus or the like.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: December 7, 1999
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
  • Patent number: 5869560
    Abstract: Materials not releasing gaseous organic materials during use are used as a dry-type sealing material such as a gasket disposed upon mounting an air filter to an opening of a ceiling or the like, a wet-type sealing material filled and used in a gap for connecting wall materials or partitionings, a vinyl chloride sheet or a vinyl chloride cloth as a facing material for walls and floors. Specifically, a carboxylic acid ester having a molecular weight of not less than 400 is used as a plasticizer, a phenolic compound having a molecular weight of not less 300 is used as an antioxidant, an aliphatic hydrocarbon having not less than 19 carbon atoms (for example, microcrystalline wax) is used as a lubricant, and an alkylamine ethylene oxide adduct having a molecular weight of not less than 350 is used as an antistatic agent.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: February 9, 1999
    Assignee: Taisei Corporation
    Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama