Patents Assigned to Nitto Boseki Co. Ltd.
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Patent number: 6687650Abstract: An indoor environment design system 10 is composed of a target communication quality input section 12 for inputting a target communication quality of radio communication in a room, a signal propagation property calculation section 14 for calculating a delay spread in the room for implementation of the target communication quality, a signal propagation property conversion section 16 for converting the delay spread in the room thus calculated, to a delay spread in a laboratory, and an indoor environment design section 18 for designing an environment in the room for radio communication, based on the delay spread in the laboratory thus converted and on a relation between delay spreads in the laboratory and environments in the laboratory for implementation of the delay spreads in the laboratory, which is preliminarily obtained experimentally.Type: GrantFiled: June 5, 2001Date of Patent: February 3, 2004Assignee: Nitto Boseki Co., Ltd.Inventors: Hideyuki Hatanaka, Masato Ohtsubo, Sadaaki Arikawa
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Patent number: 6645735Abstract: A two reagent-type kit for assaying GPT by acting GPT on L-alanine and &agr;-ketoglutarate in the presence of pyridoxal phosphate, converting the resulting pyruvate into lactate with L-lactate dehydrogenase (LDH) in the presence of reduced nicotinamide adenine dinucleotide (NADH) and measuring GPT based on a decrement of NADH, the GPT assay kit comprising a first reagent and a second reagent, one of which contains pyridoxal phosphate, L-alanine, &agr;-ketoglutarate, LDH and NADH and the other reagent contains no pyridoxal phosphate but contains L-alanine. The GPT assay kit is stable over a long period of time.Type: GrantFiled: March 14, 2001Date of Patent: November 11, 2003Assignee: Nitto Boseki Co., Ltd.Inventors: Yoshiro Sato, Chie Satokawa, Ryo Kojima, Katsuhiro Katayama
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Publication number: 20030204062Abstract: Monocolonal antibodies having a higher reactivity with tartrate-resistant acid phosphatase 5b (TRACP 5b) than tartrate-resistant acid phosphatase 5a (TRACP 5a) and having a higher specificity to TRACP 5b can be obtained by cell fusion using as antigens TRACP 5b purified from human osteoclasts. By using the monoclonal antibody, TRACP 5b in a sample can be detected specifically with a high sensitivity.Type: ApplicationFiled: April 29, 2003Publication date: October 30, 2003Applicant: NITTO BOSEKI CO., LTD.Inventors: Tatsuya Ohashi, Toshihide Miura, Yoshihiko Igarashi, Kumiko Sasagawa, Katsuhiro Katayama
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Patent number: 6615616Abstract: A nonwoven fabric is constructed of a highly flat glass fiber which is a glass fiber whose section is flat and has a flatness ratio of 2.0 to 10 and which has such a section that the packing fraction is at least 85%, preferably at least 90%. In this nonwoven fabric, the glass fiber section has a shape near rectangle, and hence, the glass fibers can be arranged very densely to form a thin nonwoven fabric having a high bulk density, and when it is used as a laminate material, the glass fiber content can be increased and the surface smoothness can simultaneously be enhanced and can be used appropriately as a reinforcing material for a printed wiring board. Moreover, the above flat glass fiber can be produced by use of, for example, a nozzle having such a shape that one side of the major axis walls of a nozzle chip having a flat nozzle hole is partly notched.Type: GrantFiled: February 11, 2003Date of Patent: September 9, 2003Assignee: Nitto Boseki Co. Ltd.Inventors: Michio Konno, Yasushi Miura, Shoichi Saito, Shin Kasai
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Publication number: 20030131632Abstract: A nonwoven fabric is constructed of a highly flat glass fiber which is a glass fiber whose section is flat and has a flatness ratio of 2.0 to 10 and which has such a section that the packing fraction is at least 85%, preferably at least 90%. In this nonwoven fabric, the glass fiber section has a shape near rectangle, and hence, the glass fibers can be arranged very densely to form a thin nonwoven fabric having a high bulk density, and when it is used as a laminate material, the glass fiber content can be increased and the surface smoothness can simultaneously be enhanced and can be used appropriately as a reinforcing material for a printed wiring board. Moreover, the above flat glass fiber can be produced by use of, for example, a nozzle having such a shape that one side of the major axis walls of a nozzle chip having a flat nozzle hole is partly notched.Type: ApplicationFiled: February 11, 2003Publication date: July 17, 2003Applicant: NITTO BOSEKI CO., LTD.Inventors: Michio Konno, Yasushi Miura, Shoichi Saito, Shin Kasai
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Patent number: 6579933Abstract: A high-molecular-weight monoallylamine polymer aqueous solution containing a monoallylamine polymer having a weight average molecular weight of 20,000 to 180,000 is prepared by polymerizing a monoallylamine sulfate in an aqueous medium in the presence of a specific radical polymerization initiator, and thereby providing the above high-molecular-weight monoallylamine polymer in an aqueous solution. High-molecular-weight monoallylamine polymer for various uses can be efficiently prepared.Type: GrantFiled: November 16, 2000Date of Patent: June 17, 2003Assignee: Nitto Boseki Co., Ltd.Inventors: Ikuo Hayashi, Hiroyuki Takayama, Kenji Kageno
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Patent number: 6543258Abstract: A nonwoven fabric is constructed of a highly flat glass fiber which is a glass fiber whose section is flat and has a flatness ratio of 2.0 to 10 and which has such a section that the packing fraction is at least 85%, preferably at least 90%. In this nonwoven fabric, the glass fiber section has a shape near rectangle, and hence, the glass fibers can be arranged very densely to form a thin nonwoven fabric having a high bulk density, and when it is used as a laminate material, the glass fiber content can be increased and the surface smoothness can simultaneously be enhanced and can be used appropriately as a reinforcing material for a printed wiring board. Moreover, the above flat glass fiber can be produced by use of, for example, a nozzle having such a shape that one side of the major axis walls of a nozzle chip having a flat nozzle hole is partly notched.Type: GrantFiled: May 30, 2000Date of Patent: April 8, 2003Assignee: Nitto Boseki Co., Ltd.Inventors: Michio Konno, Yasushi Miura, Shoichi Saito, Shin Kasai
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Publication number: 20030054936Abstract: Disclosed are a low-dielectric-constant glass fiber having a glass composition comprising, by weight %, 50 to 60% of SiO2, 10 to 18% of Al2O3, 14% to less than 20% of B2O3, 1% to less than 6% of MgO, 2 to 5% of CaO, 0.5 to 5% of TiO2, 0 to 0.3% of Li2O, 0 to 0.3% of Na2O, 0 to 0.5% of K2O and 0 to 2% of F2, the content of MgO+CaO being 4 to 11% and the content of Li2O+Na2O+K2O being 0 to 0.6%, and a glass fiber fabric made of the low-dielectric-constant glass fiber.Type: ApplicationFiled: November 1, 2002Publication date: March 20, 2003Applicant: Nitto Boseki Co., Ltd.Inventor: Shinichi Tamura
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Patent number: 6395849Abstract: The present invention relates to processes for industrially advantageously producing, in high yields, an N,N-dialkylallylamine polymer or an addition salt thereof, a copolymer of N,N-dialkylallylamine and monoallylamine or an addition salt thereof, and a copolymer of N,N-dialkylallylamine and diallylamine or an addition salt thereof, which are useful for various uses in the field of fine chemicals and particularly useful as a water-resistance-imparting agent for an inkjet ink.Type: GrantFiled: May 31, 2000Date of Patent: May 28, 2002Assignee: Nitto Boseki Co., Ltd.Inventors: Tadashi Kato, Yasuhiro Fujita, Ikuo Hayashi, Hitoshi Ohta, Kazuhiko Kitamura
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Patent number: 6380296Abstract: A polyolefin resin type interior material which contains neither a halogen nor a phthalate series plasticizer, is equivalent to a conventional PVC resin type interior material in the properties such as scratch resistance, designing applicability and workability, exhibits excellent adherence with an adhesive conventionally used for an interior material is obtained from a mixture comprising 10 to 45 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate concentration of at least 50 wt. %, 55 to 90 parts by weight of a polyolefin resin, and 100 to 700 parts by weight of an inorganic filler, said ethylene-vinyl acetate copolymer having a melt flow rate (which will be abbreviated as “MFR”) greater by at least 20 g/10 min than said polyolefin resin.Type: GrantFiled: July 11, 2000Date of Patent: April 30, 2002Assignee: Nitto Boseki Co., Ltd.Inventor: Toshiaki Inada
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Publication number: 20020009763Abstract: A two reagent-type kit for assaying GPT by acting GPT on L-alanine and &agr;-ketoglutarate in the presence of pyridoxal phosphate, converting the resulting pyruvate into lactate with L-lactate dehydrogenase (LDH) in the presence of reduced nicotinamide adenine dinucleotide (NADH) and measuring GPT based on a decrement of NADH, the GPT assay kit comprising a first reagent and a second reagent, one of which contains pyridoxal phosphate, L-alanine, &agr;-ketoglutarate, LDH and NADH and the other reagent contains no pyridoxal phosphate but contains L-alanine. The GPT assay kit is stable over a long period of time.Type: ApplicationFiled: March 14, 2001Publication date: January 24, 2002Applicant: Nitto Boseki Co., Ltd.Inventors: Yoshiro Sato, Chie Satokawa, Ryo Kojima, Katsuhiro Katayama
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Patent number: 6309990Abstract: A low-dielectric-constant glass fiber having a glass composition comprising, by % by weight, 45 to 60% of SiO2, 8 to 20% of Al2O3, 15 to 30% of B2O3, 0 to 5% of MgO, 5%, exclusive of 5%, to 12% of CaO, 0 to 1.0% of Li2O+Na2O+K2O, 0.5 to 5% of TiO2 and 0 to 2% of F2 is suitable for use for reinforcing a high-density printed wiring board required to have a low dielectric tangent and its peripheral members.Type: GrantFiled: April 14, 1999Date of Patent: October 30, 2001Assignees: Nitto Boseki Co., Ltd., Nitto Glass Fiber Mfg. Co., LtdInventors: Shinichi Tamura, Masahiro Mori
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Patent number: 6299727Abstract: The present invention provides a ceiling panel intended for good design which exhibits a light weight, sufficient flexural strength, incombustibility, sound-absorbing properties and heat insulation properties and desirable electric radiation-absorbing properties as an interior ceiling panel that acts as a best member for solving problems with communications by wireless LAN. The present invention also provides an interior ceiling panel having enhanced electric radiation barrier properties attained by applying a metal foil to the foregoing ceiling panel. A novel incombustible sound-absorbing electric radiation-absorbing ceiling panel having a thickness of from 1 mm to 30 mm is obtained by subjecting a water-dispersed slurry of a mixture of from 67 to 92 wt-% of a rock wool, from 0.5 to 8 wt-% of a beaten pulp, from 2 to 13 wt-% of a binder made of an organic resin, from 0.15 to 1 wt-% of a flocculating agent, from 0.5 to 10 wt-% of a natural mineral fiber and from 0.Type: GrantFiled: June 13, 2000Date of Patent: October 9, 2001Assignee: Nitto Boseki Co., Ltd.Inventors: Hideyuki Hatanaka, Masato Ohtsubo
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Patent number: 6283166Abstract: A glass woven fabric composed of glass fiber warp threads and glass fiber weft threads, characterized in that the glass fiber warp threads are woven with the glass fiber weft threads at intervals of at least 10 mm in each of the warp and weft directions and characterized by comprising a glass fiber woven fabric portion having non-woven portions in each of which a warp layer in which only the glass fiber warp threads are successively placed side by side and a weft layer in which only the glass fiber weft threads are successively placed side by side are laminated. When the glass woven fabric of this invention is used, a printed wiring board excellent in dimensional stability and surface smoothness can be provided.Type: GrantFiled: September 27, 1999Date of Patent: September 4, 2001Assignee: Nitto Boseki Co., Ltd.Inventors: Keita Miyasato, Eiji Sato
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Patent number: 6268452Abstract: Provided is an industrially advantageous process for producing allylamine polymers from various allylamines in an organic solvent with ease and at high yields, and the process comprises polymerizing allylamines in a medium containing an organic solvent in the presence of an azo compound selected from azo compounds of the formulae (I) and (II), wherein symbols are as defined in the specification.Type: GrantFiled: April 14, 1999Date of Patent: July 31, 2001Assignee: Nitto Boseki Co., Ltd.Inventors: Tadashi Kato, Yasuhito Nakata, Tadao Endo, Ikuo Hayashi
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Patent number: 6268166Abstract: There is provided an enzymatic method of rapid quantitative assay for 1,5-anhydroglucitol which is also applicable to an automated analysis device. The enzymatic method of quantitative assay for 1,5-anhydroglucitol is characterized by using a pyranose oxidase derived from Basidiomycetous fungi No. 52 as a pyranose oxidase. According to the assaying method of the present invention, assay for 1,5-anhydroglucitol in a specimen can be performed using an automated analysis device, results in rapid assay and improved accuracy.Type: GrantFiled: April 19, 1994Date of Patent: July 31, 2001Assignee: Nitto Boseki Co., LTDInventors: Ryo Kojima, Yoshiro Sato, Takeshi Nagasawa
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Patent number: 6106946Abstract: Provided are microcapsules enclosing therein a magnetic fluid, which are useful for imparting sound-absorbing and insulating ability to building materials, etc. by incorporation thereinto or adhesion thereto by means of an adhesive, and processes for producing the microcapsules. The heat-expandable microcapsule of the present invention comprises (i) a shell composed of a thermoplastic resin and (ii) a magnetic fluid which is a dispersion of magnetic substance fine particles having an average particle diameter of 5-200 nm in a hydrophobic organic solvent and a hydrophobic liquid foaming agent, both enclosed in the shell. The hollow microcapsule of the present invention comprises (i) a shell composed of a thermoplastic resin, and (ii) a magnetic fluid which is a dispersion of magnetic substance fine particles having an average particle diameter of 5-200 nm in a hydrophobic organic solvent and a vacant cell both included in the shell.Type: GrantFiled: September 11, 1998Date of Patent: August 22, 2000Assignees: Matsumoto Yushi-Seiyaku Co., Ltd., Nitto Boseki Co., LTDInventors: Koji Tanaka, Toshihiko Shibamoto, Akihiko Nishizaki
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Patent number: 6090478Abstract: A light-weight sound absorbing and insulating plastic sheet material which exhibits an excellent sound absorbing and insulating effect even in the low- and medium-pitched sound range for use in building materials and sound-proof walls and a sound absorbing and insulating plastic panel using the plastic sheet material are provided. The sound absorbing and insulating plastic sheet material of the present invention comprises a plastic sheet-formed substance and magnetic fluid-enclosing capsules contained in the sheet-formed substance. The sound absorbing and insulating plastic panel of the present invention comprises the above-mentioned sound absorbing and insulating plastic sheet material and a fiber-reinforced plastic sheet bound to at least one side of the sheet material. The sound absorbing and insulating plastic sheet material and the sound absorbing and insulating plastic panel of the present invention are excellent also in electromagnetic wave shielding effect.Type: GrantFiled: September 11, 1996Date of Patent: July 18, 2000Assignees: Nitto Boseki Co., Ltd., Matsumoto Yushi-Seiyaku Co., Ltd.Inventors: Akihiko Nishizaki, Koji Tanaka, Toshihiko Shibamoto
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Patent number: 6035965Abstract: To provide a sound absorbing structure having a superior sound absorbing characteristic and an external appearance of the sound absorbing structure which does not cause flicker or the like, by disposal, for example, in the front of an air chamber, a plurality of ribs (2a) are disposed on one surface of the sound absorbing board body (2), and a plurality of through-holes (3) are provided in basal portions (2b) between the ribs (2a) to form a porous structure. Concealing materials (5) are provided between the ribs (2a) of the sound absorbing board body to conceal the through-holes (3), respectively.Type: GrantFiled: December 4, 1998Date of Patent: March 14, 2000Assignee: Nitto Boseki Co., Ltd.Inventors: Kyoji Fujiwara, Shinta Yamamura, Naoyuki Furuta, Tadanori Mizukami, Yutaka Tasaki, Takashi Mikami
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Patent number: 5958808Abstract: The low-dielectric-constant glass fiber of the present invention contains by weight, as a glass composition, 50 to 60% of SiO.sub.2, 10 to 20% of Al.sub.2 O.sub.3, 20 to 30% of B.sub.2 O.sub.3, 0 to 5% of CaO, 0 to 4% of MgO, 0 to 0.5% of Li.sub.2 O+Na.sub.2 O+K.sub.2 O and 0.5 to 5% of TiO.sub.2, and is preferably used as glass for printed wiring boards.Type: GrantFiled: March 18, 1998Date of Patent: September 28, 1999Assignees: Nitto Boseki Co., Ltd, Nitto Glass Fiber Mfg. Co., Ltd.Inventors: Masahiro Mori, Shinichi Tamura, Syoichi Saito, Kenzo Watabe, Tatsuo Inada, Masahiro Yamamoto