Patents by Inventor Hideo Naka
Hideo Naka 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: 7998312Abstract: Moisture absorptive and desorptive paper having both high moisture absorptive and desorptive properties and high dimensional stability is provided. Moisture absorptive and desorptive paper comprising organic fine particles having cross-linking structure and 1 to 10 mmol/g of acidic group where not less than 1 mmol/g of metal ion of at least one kind of metal selected from the group consisting of Li, Na, K, Mg and Ca is bonded to said acidic group, inorganic fiber and pulp-shaped fiber. By the basic constitution as above, on one hand the moisture absorptive and desorptive properties inherent to the organic fine particles are efficiently utilized by suppressing the use of binder as much as possible, and on the other hand deformation or thermal shrinking of the paper due to swelling in water at the time of absorption etc. is able to be suppressed.Type: GrantFiled: November 29, 2004Date of Patent: August 16, 2011Assignee: Japan Exlan Company LimitedInventors: Ryosuke Nishida, Hideo Naka
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Publication number: 20100086617Abstract: A fiber which has an excellent effect of inhibiting virus multiplication or eradication (deactivation); a process for producing the fiber; and a textile product comprising the fiber are provided. The method for producing an antiviral fiber comprises bonding a metal ion of a metal having deactivation effect to a virus and poor solubility in water to at least a part of a carboxyl group of the fiber having a cross-linked structure and having a carboxyl group in a molecule of the fiber; and then depositing fine particles of the metal and/or metal compound in the fiber by reduction and/or substitution reaction.Type: ApplicationFiled: December 10, 2009Publication date: April 8, 2010Applicants: JAPAN EXLAN CO., LTD, TOYO BOSEKI KABUSHIKI KAISHAInventors: Shozo SHIGITA, Hideyuki TSURUMI, Hideo NAKA
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Publication number: 20070169278Abstract: A fiber which has an excellent effect of inhibiting virus multiplication or eradication (deactivation); a process for producing the fiber; and a textile product comprising the fiber are provided. The method for producing an antiviral fiber comprises bonding a metal ion of a metal having deactivation effect to a virus and poor solubility in water to at least a part of a carboxyl group of the fiber having a cross-linked structure and having a carboxyl group in a molecule of the fiber; and then depositing fine particles of the metal and/or metal compound in the fiber by reduction and/or substitution reaction.Type: ApplicationFiled: March 1, 2005Publication date: July 26, 2007Applicants: JAPAN EXLAN CO., LTD., TOYO BOSEKI KABUSHIKI KAISHAInventors: Shozo Shigita, Hideyuki Tsurumi, Hideo Naka
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Publication number: 20070158043Abstract: Moisture absorptive and desorptive paper having both high moisture absorptive and desorptive properties and high dimensional stability is provided. Moisture absorptive and desorptive paper comprising organic fine particles having cross-linking structure and 1 to 10 mmol/g of acidic group where not less than 1 mmol/g of metal ion of at least one kind of metal selected from the group consisting of Li, Na, K, Mg and Ca is bonded to said acidic group, inorganic fiber and pulp-shaped fiber. By the basic constitution as above, on one hand the moisture absorptive and desorptive properties inherent to the organic fine particles are efficiently utilized by suppressing the use of binder as much as possible, and on the other hand deformation or thermal shrinking of the paper due to swelling in water at the time of absorption etc. is able to be suppressed.Type: ApplicationFiled: November 29, 2004Publication date: July 12, 2007Inventors: Ryosuke Nishida, Hideo Naka
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Patent number: 7071130Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.Type: GrantFiled: July 21, 2003Date of Patent: July 4, 2006Assignees: Awa Paper Mfg. Co., Ltd., Japan Exlan Company LimitedInventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
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Publication number: 20050176330Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.Type: ApplicationFiled: July 21, 2003Publication date: August 11, 2005Inventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
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Patent number: 6613828Abstract: It is disclosed that an antibacterial acrylonitrile fiber having a photocatalytic activity in which an acrylonitrile fiber containing an antibacterially active metal compound is subjected to a heat treatment within a range of pH 1-6.Type: GrantFiled: September 21, 2000Date of Patent: September 2, 2003Assignee: Japan Exlan Company LimitedInventors: Hiroki Kourai, Hideo Naka
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Patent number: 4924017Abstract: A stannic acid anhydride represented by the structural formula shown below.Type: GrantFiled: July 22, 1988Date of Patent: May 8, 1990Assignee: Japan Exlan Company LimitedInventors: Toshiyuki Kobashi, Hideo Naka
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Patent number: 4873352Abstract: By reacting a tin carboxylate with hydrogen peroxide at a particular ratio in an aqueous medium, this invention provides a transparent aqueous tin compound solution which can finally form, in an industrially advantageous manner, tin oxide having excellent transparency, uniformity, compactness, conductivity, etc.Type: GrantFiled: February 4, 1987Date of Patent: October 10, 1989Assignee: Japan Exlan Company LimitedInventors: Toshiyuki Kobashi, Hideo Naka
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Patent number: 4794152Abstract: A bead-like glycidyl (meth)acrylate polymer is produced by aqueous suspension polymerization of glycidyl (meth)acrylate alone or a monomer mixture composed of more than 50 weight % of said monomer and at least one other monomer which forms the remainder, in the presence of a specific aqueous polymer, at a pH of from 2 to 9 and at a stirring speed of from 50 to 500 r.p.m. By heat treating said bead-like polymer at a pH below 3 and at a temperature above 70.degree. C., hydroxyl groups resulting from the ring opening of the epoxy groups are introduced, whereby a solvent-insoluble bead-like polymer having a gel water content not less than 30% is produced.Type: GrantFiled: February 4, 1986Date of Patent: December 27, 1988Assignee: Japan Exlan Company LimitedInventors: Toshiyuki Kobashi, Hideo Naka, Shoyo Takagi
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Patent number: 4753753Abstract: This invention provides an aqueous antimony oxide sol composed of Sb.sub.6 O.sub.13, 1 to 100 m.mu. in particle diameter, dispersed in an aqueous medium or composed of said Sb.sub.6 O.sub.13 treated with a particular quantity of a particular organic silicon compound and regulated to within a prescribed pH range, which has a high concentration and a small quantity of impurities, and moreover has excellent thermal stability and chemical stability.Type: GrantFiled: October 31, 1986Date of Patent: June 28, 1988Assignee: Japan Exlan Company, LimitedInventors: Toshiyuki Kobashi, Hideo Naka
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Patent number: 4737290Abstract: The present invention provides a gel having excellent separation ability, operability and a long life, for separating useful components from a rhodanate-containing detoxication treated liquid. The gel consists of a cross-linked polymer with more than 50 weight % of repeating units which are composed of 2,3-dioxypropyl (meth)acrylate or 2,3-dioxypropyl (meth)allyl ether, and whose average particle diameter is more than 10.mu. and gel water content is from 30 to 150%. The present invention also provides a method of separation using said gel.Type: GrantFiled: March 9, 1987Date of Patent: April 12, 1988Assignee: Japan Exlan Company, LimitedInventors: Toshiyuki Kobashi, Hideo Naka, Jinya Takeuchi
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Patent number: 4725646Abstract: Hard polyvinyl alcohol gel is produced by copolymerizing a carboxylic acid vinyl ester monomer with a particular cross-linking agent and then saponifying the copolymer. This hard polyvinyl alcohol gel has excellent mechanical strength and separation ability and has no problem in copolymerizability and polymerization speed. Moreover, it shows no change in cross-linked structure before and after saponification.Type: GrantFiled: June 24, 1986Date of Patent: February 16, 1988Assignee: Japan Exlan Company, LimitedInventors: Toshiyuki Kobashi, Hideo Naka, Jinya Takeuchi
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Patent number: 4659847Abstract: The present invention provides chemically stable colloidal antimony oxide which has been treated with a particular organosilicon compound in the ratio of from 0.5 to 25 weight % based on the antimony and whose pH has been regulated to within the range of from 2 to 12.Type: GrantFiled: March 29, 1985Date of Patent: April 21, 1987Assignee: Japan Exlan Company, Ltd.Inventors: Toshiyuki Kobashi, Hideo Naka
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Patent number: 4565832Abstract: The present invention relates to a process for producing a packing material for use in liquid chromatography which comprises aqueous suspension polymerizing vinyl acetate, a (meth)acrylic acid ester or a glycidyl monovinyl ester or ether with a monomer mixture composed mainly of a cross-linking monomer in the presence of a diluent selected from among epichlorohydrin and glycidyl ethers and thereafter removing it from the resulting polymer particles by ring-opening the epoxy groups in said diluent. This process provides a packing material for use in liquid chromatography which is uniform and porous and moreover is excellent in mechanical strength.Type: GrantFiled: November 30, 1984Date of Patent: January 21, 1986Assignee: Japan Exlan Company LimitedInventors: Toshiyuki Kobashi, Shoyo Takagi, Hideo Naka
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Patent number: 4546146Abstract: A process for copolymerizing acrylonitrile (AN) with an amount of a monomer of a specific structure in an organic solvent which can dissolve AN but cannot dissolve polyacrylonitrile (PAN). The polymer dispersion in the solvent is stable upon storage. The dispersed particles of the polymer are uniform and fine, and are sufficiently prevented from agglomeration and agglutination.Type: GrantFiled: October 16, 1984Date of Patent: October 8, 1985Assignee: Japan Exlan Company, Ltd.Inventors: Toshiyuki Kobashi, Hideo Naka
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Patent number: 4533538Abstract: Colloidal antimony oxide is produced by reacting hydrogen peroxide with antimony trioxide to form a colloidal salt of antimony oxide. In the reaction there is added to the reaction system 1.5 to 30 mol percent of an inorganic alkaline substance per mol of antimony trioxide.Type: GrantFiled: June 12, 1984Date of Patent: August 6, 1985Assignee: Japan Exlan Company LimitedInventors: Toshiyuki Kobashi, Hideo Naka