Patents by Inventor Shiro Nishi
Shiro Nishi 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: 5609795Abstract: The present invention presents a solid polymer electrolyte consisting of a multiphase polymer matrix and an electrolyte solution. The polymer matrix consists of a highly polar polymeric (HPP) phase impregnated with the electrolyte solution to form ion conducting channels, and a less polar polymeric (LPP) phase, constituting the support structure. Further, the invented solid polymer electrolyte may also include a second ion conducting channels, forming a multiphase microstructure in which the electrolyte solution is present around the LPP particles as a fine mesh-like network. The invention also presents two kinds of method for making such a solid polymer electrolyte. The first includes the steps of: making a multiphase polymer matrix; and impregnating the polymer matrix with an electrolyte solution.Type: GrantFiled: June 6, 1995Date of Patent: March 11, 1997Assignee: Nippon Telegraph and Telephone CorporationInventors: Morihiko Matsumoto, Toshihiro Ichino, Shiro Nishi
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Patent number: 5585039Abstract: The present invention presents a solid polymer electrolyte consisting of a multiphase polymer matrix and an electrolyte solution. The polymer matrix consists of a highly polar polymeric (HPP) phase impregnated with the electrolyte solution to form ion conducting channels, and a less polar polymeric (LPP) phase, constituting the support structure. Further, the invented solid polymer electrolyte may also include a second ion conducting channels, forming a multiphase microstructure in which the electrolyte solution is present around the LPP particles as a fine mesh-like network. The invention also presents two kinds of method for making such a solid polymer electrolyte. The first includes the steps of: making a multiphase polymer matrix; and impregnating the polymer matrix with an electrolyte solution.Type: GrantFiled: December 11, 1995Date of Patent: December 17, 1996Assignee: Nippon Telegraph and Telephone CorporationInventors: Morihiko Matsumoto, Toshihiro Ichino, Shiro Nishi
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Patent number: 5332535Abstract: A dielectric multilayer filter applicable to optical communication systems is disclosed, as is a fabrication method therefor, and an optical element incorporating the same. The disclosed dielectric multilayer filter includes a fluorinated polyimide base layer with a dielectric multilayer formed thereover. According to the disclosed fabrication method, a fluorinated polyimide layer is formed by applying liquid fluorinated polyimide material over a smooth surface to a predetermined thickness followed by drying and hardening, after which a dielectric multilayer is formed over the fluorinated polyimide layer by an ion assist vapor deposition method, and then stripping the fluorinated polyimide layer away from the underlying smooth surface. The disclosed dielectric multilayer filter can be easily and economically produced at a suitably small thickness with no need for grinding, exhibits highly uniform physical and optical properties, and is exceedingly durable and resistant to curling and warping.Type: GrantFiled: April 30, 1993Date of Patent: July 26, 1994Assignee: Nippon Telegraph and Telephone CorporationInventors: Taisuke Oguchi, Hiroaki Hanafusa, Juichi Noda, Yamada Noriyoshi, Shiro Nishi, Nobuo Tomita
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Patent number: 5234772Abstract: A dielectric multilayer filter applicable to optical communication systems is disclosed, as is a fabrication method therefor, and an optical element incorporating the same. The disclosed dielectric multilayer filter includes a fluorinated polyimide base layer with a dielectric multilayer formed thereover. According to the disclosed fabrication method, a fluorinated polyimide layer is formed by applying liquid fluorinated polyimide material over a smooth surface to a predetermined thickness followed by drying and hardening, after which a dielectric multilayer is formed over the fluorinated polyimide layer by an ion assist vapor deposition method, and then stripping the fluorinated polyimide layer away from the underlying smooth surface. The disclosed dielectric multilayer filter can be easily and economically produced at a suitably small thickness with no need for grinding, exhibits highly uniform physical and optical properties, and is exceedingly durable and resistant to curling and warping.Type: GrantFiled: February 12, 1991Date of Patent: August 10, 1993Assignee: Nippon Telegraph and Telephone CorporationInventors: Taisuke Oguchi, Hiroaki Hanafusa, Juichi Noda, Noriyoshi Yamada, Shiro Nishi, Nobuo Tomita
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Patent number: 5108201Abstract: An optical waveguide which has properties including low optical losses, facile fabrication, controllable core-cladding refractive index ratio, and a high heat resistance is provided. The optical waveguide for light transmission therethrough has a core made of a polyimide obtained from at least one tetracarboxylic acid dianhydride and at least one diamine. The polyimide is (a) a polyimide homopolymer derived from a diamine represented by formula [I] as follows: ##STR1## (b) a polyimide copolymer derived from at least one diamine including the diamine represented by the formula [I]; or (c) a mixture of the polyimide homopolymers.Type: GrantFiled: April 26, 1991Date of Patent: April 28, 1992Assignee: Nippon Telegraph and Telephone CorporationInventors: Toru Matsuura, Shiro Nishi, Shigekuni Sasaki, Toshihiro Ichino, Fumio Yamamoto, Shinji Ando, Fusao Shimokawa, Shinji Koike
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Patent number: 4948831Abstract: A process for the preparation of a polyetherimide/epoxyimide resin composition comprising (a) mixing a polyetherimide and an epoxyimide in a mixing ratio, by weight, of polyetherimide to epoxyimide of from 6:1 to 1:1 in a polar solvent to form a mixed resin composition, said polyetherimide being represented by the following formula of: ##STR1## said epoxyimide being represented by the following general formula of: ##STR2## wherein n is an integer from from 0 to 10; and R.sub.2 is a bifunctional organic radical residue selected from the group consisting of diphenylmethane, diphenyl ether, diphenyl sulfone, m-phenylene, p-phenylene and 1,6-hexamethylene; (b) molding said mixed resin composition prepared in the preceding mixing step, followed by removal of said polar solvent from the molded mixture; and (c) heating molded composition at a temperature of 100.degree. C. to 300.degree. C. for 1 to 3 hours.Type: GrantFiled: December 7, 1988Date of Patent: August 14, 1990Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiro Nishi, Shigekuni Sasaki, Yoshinori Hasuda
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Patent number: 4808676Abstract: A polyetherimide/epoxyimide resin composition prepared by mixing a polyetherimide having a repeating unit represented, for example, by the formula of: ##STR1## with an epoxyimide represented by the following general formula of: ##STR2## wherein R is, for example, selected from the group consisting of diphenyl ether, diphenylmethane, diphenyl sulfone, m-phenylene, p-phenylene and 1,6-hexamehtylene;in a mixing ratio, by weight, of preferably from 6:1 to 1:1. The resin composition is mixed in a solvent to form a solution from which a film may be formed through a flow-coating method. The film made of the polyetherimde/epoxyimide resin composition of the invention, after being removed of the solvent followed by thermal treatment at a temperature of 150.degree. C. to 220.degree. C. for 1 to 3 hours, has improved thermal resistance, adaptability for adhesive, and low moisture permeability.Type: GrantFiled: October 7, 1987Date of Patent: February 28, 1989Assignee: Nippon Telegraph and Telephone CorporationInventors: Shiro Nishi, Shigekuni Sasaki, Yoshinori Hasuda