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).
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Patent number: 6929985Abstract: 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: GrantFiled: March 8, 2002Date of Patent: August 16, 2005Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 6613835Abstract: 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: GrantFiled: February 4, 2000Date of Patent: September 2, 2003Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Publication number: 20030000187Abstract: 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: ApplicationFiled: March 8, 2002Publication date: January 2, 2003Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 6471740Abstract: 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: GrantFiled: December 13, 2000Date of Patent: October 29, 2002Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 6337365Abstract: 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: GrantFiled: September 24, 1999Date of Patent: January 8, 2002Assignees: Tokyo Electron Limited, Taisei CorporationInventors: Takenobu Matsuo, Tsuyoshi Wakabayashi, Misako Saito, Sadao Kobayashi, Yoshihide Wakayama, Masayuki Imafuku
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Patent number: 6293982Abstract: 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: GrantFiled: September 27, 1999Date of Patent: September 25, 2001Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Publication number: 20010000375Abstract: 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: ApplicationFiled: December 13, 2000Publication date: April 26, 2001Inventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 6155922Abstract: 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: GrantFiled: June 4, 1998Date of Patent: December 5, 2000Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 6106586Abstract: 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: GrantFiled: September 24, 1999Date of Patent: August 22, 2000Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 6077894Abstract: 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: GrantFiled: September 29, 1998Date of Patent: June 20, 2000Assignees: Tokyo Electron Limited, Taisei CorporationInventors: Misako Saito, Takenobu Matsuo, Tsuyoshi Wakabayashi, Sadao Kobayashi, Yoshihide Wakayama, Masayuki Imafuku
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Patent number: 5997598Abstract: 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: GrantFiled: March 27, 1997Date of Patent: December 7, 1999Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama
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Patent number: 5869560Abstract: 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: GrantFiled: July 24, 1996Date of Patent: February 9, 1999Assignee: Taisei CorporationInventors: Sadao Kobayashi, Masayuki Imafuku, Yoshihide Wakayama