Patents by Inventor Tatsuo Iwai
Tatsuo Iwai 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: 10081480Abstract: An oxygen-absorbing container includes a container body having a multilayer structure constituted by an innermost layer, an outermost layer and an intermediate layer therebetween, the container body having an opening part on an upper part thereof; and a sealing member bonded to an upper end surface of the opening part of the container body to seal an opening of the opening part. The innermost layer and the intermediate layer are bent outward at an upper end of the opening part and form a flat part and a surface of the flat part forms the upper end surface of the opening part. When the sealing member is unsealed, part of the innermost layer on the upper end surface of the opening part is configured to be peeled off so as to leave an unsealed mark.Type: GrantFiled: March 12, 2015Date of Patent: September 25, 2018Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kenichi Niimi, Kiyonori Michiba, Takashi Kubo, Kazuyuki Minato, Yoshiki Itou, Takayoshi Itoh, Jungo Taguchi, Akihiro Masuda, Tatsuo Iwai
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Patent number: 9567146Abstract: A process for producing an oxygen absorbing agent includes treating an alloy with an aqueous solution of an acid or an alkali, the alloy including at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon to elute and remove at least a part of the component; and subjecting the alloy obtained by removing at least a part of the component in the alloy to treatment with an aqueous solution of a salt of an inorganic acid or a salt of an organic acid that can form a salt with the transition metal as the component, to form a metal salt in at least a part of the surface of the alloy.Type: GrantFiled: August 1, 2013Date of Patent: February 14, 2017Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Natsuko Matsushita, Emi Ishihara, Hirokazu Tanaka, Tatsuo Iwai
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Publication number: 20160325909Abstract: An oxygen-absorbing container includes a container body having a multilayer structure constituted by an innermost layer, an outermost layer and an intermediate layer therebetween, the container body having an opening part on an upper part thereof; and a sealing member bonded to an upper end surface of the opening part of the container body to seal an opening of the opening part. The innermost layer and the intermediate layer are bent outward at an upper end of the opening part and form a flat part and a surface of the flat part forms the upper end surface of the opening part. When the sealing member is unsealed, part of the innermost layer on the upper end surface of the opening part is configured to be peeled off so as to leave an unsealed mark.Type: ApplicationFiled: March 12, 2015Publication date: November 10, 2016Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kenichi NIIMI, Kiyonori MICHIBA, Takashi KUBO, Kazuyuki MINATO, Yoshiki ITOU, Takayoshi ITOH, Jungo TAGUCHI, Akihiro MASUDA, Tatsuo IWAI
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Patent number: 9387973Abstract: An oxygen absorbing agent has excellent oxygen absorbing properties and can absorb oxygen in an atmosphere, even under a moisture-free or substantially moisture-free atmosphere. The oxygen absorbing agent includes an alloy obtained by subjecting an alloy (X) including (A) at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and (B) at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon, to treatment with an alkali aqueous solution to elute and remove at least a part of the component (B) in the alloy (X), wherein the alloy (Y) has an X-ray diffraction profile satisfying a diffraction peak relationship.Type: GrantFiled: August 7, 2013Date of Patent: July 12, 2016Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Emi Ishihara, Hirokazu Tanaka, Tatsuo Iwai
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Patent number: 9315383Abstract: There is provided an oxygen absorbing agent that can have a capability of absorbing oxygen in an atmosphere even when the atmosphere is free or substantially free from moisture. The oxygen absorbing agent comprises a metal, the metal having been obtained by subjecting an alloy comprising (A) at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and (B) at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon to treatment with an acidic or alkaline aqueous solution to elute and remove at least a part of the component (B).Type: GrantFiled: January 27, 2012Date of Patent: April 19, 2016Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Emi Ishihara, Tomoharu Himeshima, Tatsuo Iwai
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Patent number: 9199778Abstract: There are provided an oxygen absorbing resin composition, an oxygen absorbing multilayered body, and an oxygen absorbing hollow container that can absorb oxygen in an atmosphere even under a low-humidity atmosphere. The oxygen absorbing resin composition includes: (I) an oxygen absorbing agent consisting of a metal (a metal of (I)) obtained by subjecting an alloy comprising (A) at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and (B) at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon, to treatment with an acidic or alkaline aqueous solution to elute and remove at least a part of the component (B); and (II) a thermoplastic resin.Type: GrantFiled: November 14, 2012Date of Patent: December 1, 2015Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Akihiro Masuda, Kiyonori Michiba, Yoshiki Itou, Kenichi Niimi, Tatsuo Iwai, Takashi Kubo
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Publication number: 20150191292Abstract: A process for producing an oxygen absorbing agent includes treating an alloy with an aqueous solution of an acid or an alkali, the alloy including at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon to elute and remove at least a part of the component; and subjecting the alloy obtained by removing at least a part of the component in the alloy to treatment with an aqueous solution of a salt of an inorganic acid or a salt of an organic acid that can form a salt with the transition metal as the component, to form a metal salt in at least a part of the surface of the alloy.Type: ApplicationFiled: August 1, 2013Publication date: July 9, 2015Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Natsuko Matsushita, Emi Ishihara, Hirokazu Tanaka, Tatsuo Iwai
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Publication number: 20140336047Abstract: An oxygen absorbing agent has excellent oxygen absorbing properties and can absorb oxygen in an atmosphere, even under a moisture-free or substantially moisture-free atmosphere. The oxygen absorbing agent includes an alloy obtained by subjecting an alloy (X) including (A) at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and (B) at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon, to treatment with an alkali aqueous solution to elute and remove at least a part of the component (B) in the alloy (X), wherein the alloy (Y) has an X-ray diffraction profile satisfying a diffraction peak relationship.Type: ApplicationFiled: August 7, 2013Publication date: November 13, 2014Inventors: Emi Ishihara, Hirokazu Tanaka, Tatsuo Iwai
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Publication number: 20140291178Abstract: There are provided an oxygen absorbing resin composition, an oxygen absorbing multilayered body, and an oxygen absorbing hollow container that can absorb oxygen in an atmosphere even under a low-humidity atmosphere. The oxygen absorbing resin composition includes: (I) an oxygen absorbing agent consisting of a metal (a metal of (I)) obtained by subjecting an alloy comprising (A) at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and (B) at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon, to treatment with an acidic or alkaline aqueous solution to elute and remove at least a part of the component (B); and (II) a thermoplastic resin.Type: ApplicationFiled: November 14, 2012Publication date: October 2, 2014Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Akihiro Masuda, Kiyonori Michiba, Yoshiki Itou, Kenichi Niimi, Tatsuo Iwai, Takashi Kubo
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Publication number: 20130209350Abstract: There is provided an oxygen absorbing agent that can have a capability of absorbing oxygen in an atmosphere even when the atmosphere is free or substantially free from moisture. The oxygen absorbing agent comprises a metal, the metal having been obtained by subjecting an alloy comprising (A) at least one transition metal selected from the group consisting of manganese, iron, platinum, and copper group metals and (B) at least one metal selected from the group consisting of aluminum, zinc, tin, lead, magnesium, and silicon to treatment with an acidic or alkaline aqueous solution to elute and remove at least a part of the component (B).Type: ApplicationFiled: January 27, 2012Publication date: August 15, 2013Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Emi Ishihara, Tomoharu Himeshima, Tatsuo Iwai
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Patent number: 7947197Abstract: A deoxidant composition comprising 100 parts by weight of iron powder, 0.01 to 20 parts by weight of metal halide and 0.01 to 5 parts by weight of water repellent agent. The deoxidant composition even when used in a high-humidity atmosphere can maintain oxygen absorption potency. A deoxidant pack for high humidity obtained by wrapping the deoxidant composition without mixing of any inorganic filler by means of an air-permeable packaging material can reduce the apparent volume of deoxidant composition, so that the amount of packaging material used in the production of the deoxidant pack can be reduced.Type: GrantFiled: November 9, 2005Date of Patent: May 24, 2011Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Takashi Nakata, Tatsuo Iwai, Takahiro Seki
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Publication number: 20090095941Abstract: A deoxidant composition comprising 100 parts by weight of iron powder, 0.01 to 20 parts by weight of metal halide and 0.01 to 5 parts by weight of water repellent agent. The deoxidant composition even when used in a high-humidity atmosphere can maintain oxygen absorption potency. A deoxidant pack for high humidity obtained by wrapping the deoxidant composition without mixing of any inorganic filler by means of an air-permeable packaging material can reduce the apparent volume of deoxidant composition, so that the amount of packaging material used in the production of the deoxidant pack can be reduced.Type: ApplicationFiled: November 9, 2005Publication date: April 16, 2009Inventors: Takashi Nakata, Tatsuo Iwai, Takahiro Seki
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Publication number: 20060163534Abstract: The oxygen-absorbing composition of the invention comprises 100 parts by weight of a carrier and an easily oxidizable organic composition that is carried on the carrier in an amount exceeding 210 parts by weight. The carrier comprises a calcium silicate compound represented by the following formula: CaO.mSiO2.nH2O wherein m is a number from 1.6 to 6.5 and n is a positive number, and has crystal structures constituted by aggregates of curved plate crystals comprising gyrolite calcium silicate and amorphous silicon dioxide. Because of a high flowability, the oxygen-absorbing composition of the invention is excellent in the productivity of the oxygen-absorbing packages. In addition, because of a large oxygen absorption per unit volume, the oxygen-absorbing package can be made compact in its shape. The oxygen-absorbing package is not detected by a metal detector because the contamination with iron components as impurities can be prevented.Type: ApplicationFiled: October 8, 2002Publication date: July 27, 2006Inventors: Ken Sugimoto, Tatsuo Iwai, Takahiro Seki
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Publication number: 20050034599Abstract: In the present invention, an oxygen absorber agent composition comprises 100 parts by weight of iron powder and 0.1 parts by weight or more of a promoter comprising an alkali metal salt or alkali earth metal salt having low moisture-transportation properties. An oxygen absorber composition packaged device is prepared by packaging the oxygen absorber composition in gas permeable packaging material, and manifests oxygen absorption function for long periods of time under high humidity conditions and offers an oxygen absorber agent composition that prevent generation of rust, and using that oxygen absorber composition packaged device, oxygen in a gas barrier vessel is removed effectively even under conditions of high humidity. Preferable alkali metal salts or alkali earth metal salts have the characteristics that 5% aqueous solutions of the salts are in equilibrium with an atmosphere having a relative humidity of 99.0% or more at 25° C.Type: ApplicationFiled: August 11, 2004Publication date: February 17, 2005Inventors: Takashi Nakata, Tatsuo Iwai, Takahiro Seki
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Patent number: 6248258Abstract: An oxygen absorbent comprising an aliphatic hydrocarbon(s) with an unsaturated group(s) and/or an unsaturated fatty acid compound(s) and a catalyst containing both a transition metal salt(s) and a non-transition metal salt(s) is provided, whereby an oxygen absorbing velocity is remarkedly promoted.Type: GrantFiled: June 14, 1999Date of Patent: June 19, 2001Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kazuyuki Tomita, Tatsuo Iwai, Tomoharu Himeshima, Takayuki Watanabe, Junko Baba
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Patent number: 6045743Abstract: Provided is a method for drying resin-used electronic parts which comprises enclosing resin-used electronic parts together with both an oxygen absorbent requiring no moisture for absorption of oxygen and a drying agent in a container having a gas barrier property and then sealing the container and removing oxygen and, preferably, then heating the sealed container. Thereby, no quality deterioration due to oxidation and degradation of a metal surface occurs in a drying step of resin-used electronic parts.Type: GrantFiled: October 29, 1997Date of Patent: April 4, 2000Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Tatsuo Iwai, Takayuki Watanabe, Hideaki Watanabe, Nobuhisa Ariyoshi, Shigeru Murabayashi, Yoshiaki Inoue
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Patent number: 6039892Abstract: There is disclosed herein an oxygen absorbent composition comprising an organic oxygen absorbent (A) which neither absorbs nor releases moisture and in which an oxidizable main component is supported on a porous silicate having an average pore diameter of 200 to 5,000 .ANG., and a formaldehyde absorbent (B) which neither absorbs nor releases moisture and is at least one of an amine, a thiol and a sulfonic acid that is supported on a porous carrier. According to this invention cultural assets made of organic materials which are required to be kept in a medial humidity atmosphere can be preserved in an atmosphere of a medial humidity, a low oxygen concentration and a low formaldehyde concentration by the use of the disclosed oxygen absorbent composition.Type: GrantFiled: February 9, 1999Date of Patent: March 21, 2000Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Tomoharu Himeshima, Kazumoto Nakagawa, Tatsuo Iwai, Takayuki Watanabe
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Patent number: 6004477Abstract: An oxygen absorption composition without requiring moisture in oxygen absorption which comprises an oxygen absorbent comprising, as a principal component, an oligomer in liquid form having an unsaturated group, a number-average molecular weight in the range of 150 to 4,000 and a viscosity in the range of 100 to 4,000 cP such as butadiene oligomer in liquid form and an oxygen absorption-accelerating substance, being supported on a carrier; and an other gas absorbent. The principal component may be replaced with an oligomer in liquid form having an unsaturated group and being incorporated with an oxygen-unabsorptive diluent to adjust the viscosity of the mixture to 10 to 4,000 cP. The composition is enhanced in oxygen absorption capability in every preservation atmosphere from a low humidity to an intermediate and high humidity, easily producible, minimized in gas generation after oxygen absorption and almost free from odor.Type: GrantFiled: October 8, 1997Date of Patent: December 21, 1999Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kazumoto Nakagawa, Tatsuo Iwai, Takayuki Watanabe, Nahomi Abe, Tomoharu Himeshima
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Patent number: 5950469Abstract: An apparatus for surface-hardening steel balls includes a container having projections protruding inwardly from and extending longitudinally along an inner wall; a support shaft having projections extending outwardly from and longitudinally along the support shaft; a container driving mechanism which rotates the container in one direction; and a support shaft driving mechanism which rotates the support shaft in an opposite direction. In operation, the container's projections transfer the balls from a lower portion of the container to a higher portion where the balls are dropped to the lower portion while the support shaft's projections strike the steel balls when the steel balls are dropping to the lower portion.Type: GrantFiled: April 3, 1998Date of Patent: September 14, 1999Assignee: Tsubaki Nakashima Co., Ltd.Inventors: Toshinori Tsuro, Tatsuo Iwai, Isao Fujiwara
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Patent number: 5438108Abstract: A grafted aromatic polycarbonate resin is produced by melt-kneading a graft precursor comprising a mixture of 35 to 95% by weight of aromatic polycarbonate resin particles and 65 to 5% by weight of vinylic copolymer containing active oxygen, the vinylic copolymer being present in the aromatic polycarbonate resin particles, thereby subjecting to grafting reaction of the aromatic polycarbonate resin and the vinylic copolymer, where the grafting reaction can be sufficiently carried out and thus the grafted polycarbonate resin is useful for molding materials for optical disks, optical lenses, etc. a polymer blend-compatible agent, adhesives, paints, etc.Type: GrantFiled: January 25, 1994Date of Patent: August 1, 1995Assignees: Mitsubishi Gas Chemical Company, Inc., NOF CorporationInventors: Toshikazu Umemura, Takayuki Watanabe, Tatsuo Iwai, Motoyuki Sugiura