Patents by Inventor Hideo Kawazu
Hideo Kawazu 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: 6852233Abstract: An object of the present invention is to provide a structure of a metal collecting material for use in seawater or river water or industrial wastewater to give the most excellent adsorption efficiency. Another object of the present invention is to provide a process for efficiently separating and recovering valuable metals or noxious metals from a metal collecting material having collected said valuable metals from seawater or noxious metals from river water or wastewater with the least possible waste generation. A metal collector according to an aspect of the present invention is formed by stacking at least partially alternate layers of a fibrous metal collecting material with a spacer for introducing a liquid to be treated into said collecting material, wherein the area of spacer side faces represents 25-75% of the total area of collecting material side faces and spacer side faces in the side faces of the stack.Type: GrantFiled: April 25, 2000Date of Patent: February 8, 2005Assignee: Ebara CorporationInventors: Takanobu Sugo, Akio Katakai, Noriaki Seko, Shin Hasegawa, Kunio Fujiwara, Hiroshi Nagai, Hideo Kawazu, Kazuyoshi Takeda, Satoshi Konishi, Hideyuki Misawa, Takashi Kawakami, Junichi Kanno, Keiji Hasegawa, Masaji Akahori
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Patent number: 6818038Abstract: A radiation graft treated material in the form of a woven or non-woven fabric material that is composed of polymer monofilament fiber of which only the surface has undergone a radiation-induced graft polymerization but of which the center remains unaffected by grafting.Type: GrantFiled: December 4, 2002Date of Patent: November 16, 2004Assignee: Ebara CorporationInventors: Takanobu Sugo, Kunio Fujiwara, Hideo Kawazu, Teruo Masubuchi, Junichi Kanno, Naotoshi Endo, Masaji Akahori
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Patent number: 6811771Abstract: An object of the present invention is to provide a filter material capable of killing microorganisms, bacteria, fungi or viruses in air or liquids. Antimicrobial organic polymer materials of the present invention comprise an organic polymer material having a polymer side chain containing a unit derived from an N-alkyl-N-vinylalkylamide on a backbone of a polymer substrate, wherein triiodide ion is carried on said organic polymer material.Type: GrantFiled: January 30, 2002Date of Patent: November 2, 2004Assignees: Ebara Corporation, Japan Atomic Energy Research InstituteInventors: Takanobu Sugo, Kazuyoshi Takeda, Kunio Fujiwara, Tadashi Adachi, Hideo Kawazu, Makoto Komatsu, Junichi Kanno, Takeshi Takai
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Patent number: 6773654Abstract: A method for performing radiation-inducted graft polymerization on substrates in the form of webs of woven or non-woven fabric, which includes the steps of exposing a substrate woven or non-woven fabric composed of polymer fiber to electron beams in a nitrogen atmosphere, contacting the irradiated substrate with a specified amount of monomer in a nitrogen atmosphere, and subjecting the monomer and the substrate in mutual contact to graft polymerization in a nitrogen atmosphere, characterized in that the first through third steps are performed in succession.Type: GrantFiled: December 4, 2002Date of Patent: August 10, 2004Assignee: Ebara CoporationInventors: Takanobu Sugo, Kunio Fujiwara, Hideo Kawazu, Teruo Masubuchi, Junichi Kanno, Naotoshi Endo, Masaji Akahori
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Patent number: 6659751Abstract: A polymer substrate for radiation-induced graft polymerization in the form of a woven or non-woven fabric that comprises a woven or non-woven fabric composed of polymer fiber and a reinforcement polymer having a greater strength and a slower rate of radiation-induced graft polymerization than said polymer fiber. Also, radiation graft treated stock prepared from said polymer substrate. In another aspect, a radiation graft treated material in the form of a woven or non-woven fabric material that is composed of polymer monofilament fiber of which only the surface has undergone a radiation-induced graft polymerization but of which the center remains unaffected by grafting.Type: GrantFiled: February 9, 2001Date of Patent: December 9, 2003Assignee: Ebara CorporationInventors: Takanobu Sugo, Kunio Fujiwara, Hideo Kawazu, Teruo Masubuchi, Junichi Kanno, Naotoshi Endo, Masaji Akahori
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Publication number: 20030153225Abstract: A radiation graft treated material in the form of a woven or non-woven fabric material that is composed of polymer monofilament fiber of which only the surface has undergone a radiation-induced graft polymerization but of which the center remains unaffected by grafting.Type: ApplicationFiled: December 4, 2002Publication date: August 14, 2003Applicant: EBARA CORPORATIONInventors: Takanobu Sugo, Kunio Fujiwara, Hideo Kawazu, Teruo Masubuchi, Junichi Kanno, Naotoshi Endo, Masaji Akahori
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Publication number: 20030134551Abstract: A method for performing radiation-inducted graft polymerization on substrates in the form of webs of woven or non-woven fabric, which includes the steps of exposing a substrate woven or non-woven fabric composed of polymer fiber to electron beams in a nitrogen atmosphere, contacting the irradiated substrate with a specified amount of monomer in a nitrogen atmosphere, and subjecting the monomer and the substrate in mutual contact to graft polymerization in a nitrogen atmosphere, characterized in that the first through third steps are performed in succession.Type: ApplicationFiled: December 4, 2002Publication date: July 17, 2003Applicant: EBARA CORPORATIONInventors: Takanobu Sugo, Kunio Fujiwara, Hideo Kawazu, Teruo Masubuchi, Junichi Kanno, Naotoshi Endo, Masaji Akahori
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Patent number: 6009739Abstract: A method for evaluating performance of a chemical filter element is disclosed. A moisture content, a weight or a pressure loss of a filter element including an ion exchanger is determined, and the determined value is compared with a prescribed value. Alternatively, the determined value is converted into a residual ion exchange capacity of the filter element, and the residual ion exchange capacity is compared with a prescribed value. When the determined value or the residual ion exchange capacity is equal to or less than the prescribed value, the filter element is exchanged. On the other hand, when the determined value or the residual ion exchange capacity is more than the prescribed value, after waiting a prescribed period, the determining step and the comparing step are repeated.Type: GrantFiled: December 18, 1997Date of Patent: January 4, 2000Assignee: Ebara CorporationInventors: Kunio Fujiwara, Takeshi Takai, Mari Katsumine, Kazuo Iwaki, Hideo Kawazu, Hideaki Sekiguchi
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Patent number: 5431824Abstract: The improved organic polymeric adsorbent is used to adsorb and remove suspended impurities present in trace amounts in the water being treated in an apparatus for producing ultrapure water for use in the semiconductor industry or in a condensate purifier in steam power generating facilities and it is composed of a particulate or powdered cation exchange resin and/or anion exchange resin. The improvement is that this adsorbent has such a surface layer structure and morphology that granules are seen to bind with one another when examined under a scanning electron microscope in a field of view ranging from a magnification of 50 to 200,000. The adsorbent may be used as the constituent of a packing layer and/or a filter layer to make a material for removing suspended impurities.Type: GrantFiled: December 15, 1993Date of Patent: July 11, 1995Assignee: Ebara CorporationInventors: Hideo Kawazu, Masahiro Hagiwara, Takeshi Izumi
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Patent number: 5425866Abstract: The improved electrically regenerable demineralizing apparatus uses ion exchangers that are produced by radiation-initiated graft polymerization and that are packed in the demineralizing compartment of an electrodialyzer. The apparatus may use a mosaic ion exchanger that consists of alternately arranged cation- and anion-exchange groups. Alternately, the apparatus may have an immobilized amino acid packed in the demineralizing compartment of an electrodialyzer. The apparatus maintains consistent water quality for a prolonged time, is capable of treating from small to large volumes of water and yet is easy to service and manage.Type: GrantFiled: November 18, 1993Date of Patent: June 20, 1995Assignees: Ebara Corporation, Japan Atomic Energy Research InstituteInventors: Takanobu Sugo, Isao Ishigaki, Kunio Fujiwara, Hideaki Sekiguchi, Hideo Kawazu, Takayuki Saito
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Patent number: 5387348Abstract: A method of mixed-bed filtration and demineralization for removing suspended impurities from the primary cooling water in a power plant by means of a demineralizer having a mixed bed formed of a particulate cation and anion exchange resin that have such a surface layer structure that granules are seen to bind with one another under microscopic examination, being able to be operated in a safe and yet economical manner by virtue of established conditions for operating processes, such as regeneration of the demineralizer by backwashing and by passage of chemicals and also, replacement of the demineralizer.Type: GrantFiled: February 23, 1993Date of Patent: February 7, 1995Assignee: Ebara CorporationInventors: Masahiro Hagiwara, Hideo Kawazu, Takeshi Izumi
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Patent number: 5308467Abstract: The improved electrically regenerable demineralizing apparatus uses ion exchangers that are produced by radiation-initiated graft polymerization and that are packed in the demineralizing compartment of an electrodialyzer. The apparatus may use a mosaic ion exchanger that consists of alternately arranged cation- and anion-exchange groups. Alternately, the apparatus may have an immobilized amino acid packed in the demineralizing compartment of an electrodialyzer. The apparatus maintains consistent water quality for a prolonged time, is capable of treating from small to large volumes of water and yet is easy to service and manage.Type: GrantFiled: August 12, 1992Date of Patent: May 3, 1994Assignees: Ebara Corporation, Atomic Energy Research InstituteInventors: Takanobu Sugo, Isao Ishigaki, Kunio Fujiwara, Hideaki Sekiguchi, Hideo Kawazu, Takayuki Saito
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Patent number: 5308876Abstract: The improved organic polymeric adsorbent is used to adsorb and remove suspended impurities present in trace amounts in the water being treated in an apparatus for producing ultrapure water for use in the semiconductor industry or in a condensate purifier in steam power generating facilities and it is composed of a particulate or powdered cation exchange resin and/or anion exchange resin. The improvement is that this adsorbent has such a surface layer structure and morphology that granules are seen to bind with one another when examined under a scanning electron microscope in a field of view ranging from a magnification of 50 to 200,000. The adsorbent may be used as the constituent of a packing layer and/or a filter layer to make a material for removing suspended impurities.Type: GrantFiled: May 28, 1992Date of Patent: May 3, 1994Assignee: Ebara CorporationInventors: Hideo Kawazu, Masahiro Hagiwara, Takeshi Izumi