Patents by Inventor Jiro Sadanobu
Jiro Sadanobu 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: 7407702Abstract: A polymetaphenylene isophthalamide-based polymer porous film having a satisfactory porous structure that exhibits excellent gas permeability and heat resistance. It is produced by a process which comprises casting a dope of the polymetaphenylene isophthalamide-based polymer and coagulating it in a coagulating bath. The porous film may also contain inorganic whiskers, and a composite porous film may be formed in combination with a separate thermoplastic polymer film.Type: GrantFiled: February 12, 2004Date of Patent: August 5, 2008Assignee: Teijin LimitedInventors: Takao Ohno, Jiro Sadanobu, Tsutomu Nakamura, Susumu Honda, Toyoaki Ishiwata
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Publication number: 20080089012Abstract: The present invention concerns an electric double layer capacitor, wherein to increase capacitance, each electrode is formed from activated carbon having an average particle size of 0.1 to 1.0 ?m. Alternatively, to prevent electrode short-circuiting, each electrode is constructed from an electrode layer sheet having an electrode layer formed from activated carbon whose specific area is 500 to 2500 m2/g and whose cumulative particle size (D90) is 0.8 to 6 ?m.Type: ApplicationFiled: December 21, 2005Publication date: April 17, 2008Applicant: TEIJIN LIMITEDInventors: Tatsuichiro Kon, Jiro Sadanobu, Satoshi Nishikawa, Hiroki Sano, Hiroshi Sakurai, Mai Kitahara
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Patent number: 6797801Abstract: An oriented polyimide film of high strength and a production process therefor. The process basically comprises stretching a gelled film and then imidating the film. The gelled film is formed by introducing a polyamic acid solution into a condensation agent solution. The gelled film is swollen with a solvent at the time of stretching.Type: GrantFiled: October 17, 2002Date of Patent: September 28, 2004Assignee: Teijin LimitedInventors: Jiro Sadanobu, Rei Nishio, Susumu Honda, Tsutomu Nakamura
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Publication number: 20040161598Abstract: A polymetaphenylene isophtha lamide-based polymer porous film having a satisfactory porous structure that exhibits excellent gas permeability and heat resistance. It is produced by a process which comprises casting a dope of the polymetaphenylene isophthalamide-based polymer and coagulating it in a coagulating bath. The porous film may also contain inorganic whiskers, and a composite porous film may be formed in combination with a separate thermoplastic polymer film.Type: ApplicationFiled: February 12, 2004Publication date: August 19, 2004Applicant: TEIJIN LIMITEDInventors: Takao Ohno, Jiro Sadanobu, Tsutomu Nakamura, Susumu Honda, Toyoaki Ishiwata
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Patent number: 6646060Abstract: A resin composition containing a mixture produced by blending a crystalline polyamide expressed e.g. by formula (1) (in the formula, R1 is a bivalent organic aromatic group or aliphatic group having a carbon number of 2 to 30, optionally having substituent and optionally containing non-reactive groups such as ether group and aromatic group in the main chain, and Ar1 is an aromatic residue having a carbon number of 6 to 45 and optionally having substituent) with a thermoplastic polyester. The resin composition has excellent mechanical characteristics such as high elastic modulus, flow properties and heat-resistance and is suitable as a material for an electronic part for surface mounting.Type: GrantFiled: January 10, 2001Date of Patent: November 11, 2003Assignee: Teijin LimitedInventors: Kiyotsuna Toyohara, Toyoaki Ishiwata, Daisuke Ozaki, Jiro Sadanobu
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Patent number: 6610794Abstract: A resin composition comprising: a polyimide comprising a recurring unit represented by the following formula (1): wherein Ar0 is an aromatic hydrocarbon group having 6 to 15 carbon atoms, and R1 is at least one group selected from the group consisting of the divalent residual group obtained by removing two amino groups from an aliphatic diamine having 2 to 30 carbon atoms and the divalent residual group obtained by removing two amino groups from an alicyclic diamine having 4 to 30 carbon atoms, and a polyarylate or polyester carbonate. This resin composition has excellent heat resistance, dimensional stability and transparency. Particularly, the resin composition having excellent transparency is advantageously used as a molded product such as a flexible printed board.Type: GrantFiled: September 20, 2001Date of Patent: August 26, 2003Assignee: Teijin LimitedInventors: Tomonori Sakurai, Jiro Sadanobu, Takashi Ito, Naoya Saito, Shintaro Shimada
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Publication number: 20030109669Abstract: An oriented polyimide film of high strength and a production process therefor. The process basically comprises stretching a gelled film and then imidating the film. The gelled film is formed by introducing a polyamic acid solution into a condensation agent solution. The gelled film is swollen with a solvent at the time of stretching.Type: ApplicationFiled: October 17, 2002Publication date: June 12, 2003Inventors: Jiro Sadanobu, Rei Nishio, Susumu Honda, Tsutomu Nakamura
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Patent number: 6569366Abstract: A meta-type wholly aromatic polyamide containing, as principal repeating units, meta-phenylenediamineisophthalamide units is dissolved in an amide compound solvent; the resultant polymer solution is subjected to a wet-spinning procedure wherein the polymer solution is extruded in the form of filamentary streams into a coagulation bath containing an amide compound-containing solvent and water but substantially not containing salts, through spinning orifices of a spinneret, to coagulate the extruded filamentary polymer solution streams in the coagulation bath; the coagulated porous undrawn filaments are subjected to a drawing procedure wherein the porous undrawn filaments are drawn in a plasticizing drawing bath containing an aqueous solution of an amide compound solvent; the resultant drawn filaments are washed with water, and then heat-treated (for example, further drawn at a draw ratio of 0.7 to 4.0 while being heated at a temperature of 250 to 400° C.Type: GrantFiled: October 15, 2001Date of Patent: May 27, 2003Assignee: Teijin LimitedInventors: Kiyotsuna Toyohara, Jiro Sadanobu, Tsutomu Nakamura
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Patent number: 6428644Abstract: An apparatus and a process for producing a laminate for electronic parts such as ceramic capacitors. After a predetermined pattern for forming an internal conductive layer is formed on a self-supporting green sheet which contains inorganic powder and an organic binder, the self-supporting green sheet is taken up by a columnar roll and laminated. At this point, the position of the same pattern on the green sheet G2 of the next cycle to be laminated adjacently onto the green sheet G1 of the previous cycle as the above pattern with respect to the predetermined pattern on the green sheet G1 taken up by the columnar roll is determined.Type: GrantFiled: October 18, 1999Date of Patent: August 6, 2002Assignee: Teijin LimitedInventors: Takao Ohno, Nobuaki Kido, Tsutomu Nakamura, Michio Yoshino, Masatoshi Ozono, Jiro Sadanobu
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Patent number: 6114472Abstract: A thermoplastic resin composition comprising an aromatic polyester and an amorphous polyimide. There is provided, for example, a polyalkylene naphthalate resin composition having greatly improved moldability and enhanced crystallinity, and being free from troubles such as bleeding out after molded. The resin composition further exhibits reduced emission of fluorescence and excellent weatherability and delamination resistance.Type: GrantFiled: July 27, 1998Date of Patent: September 5, 2000Assignee: Teijin LimitedInventors: Toshitsugu Matsuki, Masaaki Tsukioka, Jiro Sadanobu
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Patent number: 5853878Abstract: The present invention relates to an elastic fiber of polyester elastomer mainly comprising the polyester elastomer further comprising aromatic polyester component as a hard segment and poly(alkyleneoxide)glycol having a number-average molecular weight of 500 to 5000 as a soft segment, wherein a residual elongation after 400 percent stretching does not exceed 100 percent. Made of the polyester elastomer comprising 1,2-bis?4-(2-hydroxyethyl)phenoxy!ethane as the diol component constituting said aromatic polyester component, or 1,4-benzenediethanol and ethyleneglycol as the diol component constituting said aromatic polyester component, the elastic fiber features excellent elastic properties in the event of great deformation and provides suitable material for clothing.Type: GrantFiled: September 12, 1996Date of Patent: December 29, 1998Assignee: Teijin LimitedInventors: Toyoaki Ishiwata, Jiro Sadanobu
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Patent number: 5723568Abstract: A polyamide comprising a solution of (i) an aliphatic polyamide and/or an aliphatic aromatic poly amide dissolved in (ii) N-methyl-2-pyrrolidone and containing (iii) calcium chloride, the ratio between the polyamide (i) and the N-methyl-2-pyrrolidone (ii) in the solution composition being 3 to 25% by weight of the polyamide (i)to 97 to 75% by weight of the N-methyl-2-pyrrolidone, (ii) with the solution also containing calcium chloride (iii) in an amount of 5 to 60 parts by weight based on 100 parts by weight of the polyamide (i) which can be precipitated in a precipitant consisting essentially of water while stirring the precipitant to provide fibrids, which then can be mixed with fibers or natural pulp and formed into synthetic paper.Type: GrantFiled: December 29, 1995Date of Patent: March 3, 1998Assignee: Teijin LimitedInventors: Keizo Shimada, Jiro Sadanobu, Tsugusi Yosida, Yuzo Aito
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Patent number: 5290906Abstract: A poly(arylene ether ketone) of this invention principally comprises recurring units represented by formula ##STR1## wherein Ar.sup.1 denotes a 1,5-naphthalene ring, a 2,6-naphthalene ring, a 2,7-naphthalene ring or a combination of them, and Ar.sup.2 denotes p-phenylene, p,p'-biphenylene, a 1,5-naphthalene ring, a 2,6-naphthalene ring, a 2,7-naphthalene ring or a combination of them.The poly(arylene ether ketone) is high in second-order transition temperature and excellent in solvent resistance and moldability, and can be molded into heat-resistant fibers and electric insulating films.Type: GrantFiled: January 23, 1991Date of Patent: March 1, 1994Assignee: Teijin LimitedInventors: Shunichi Matsumura, Seiji Itoh, Hiroo Inata, Jiro Sadanobu
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Patent number: 5145616Abstract: A process is provided for the preparation of a pitch-based carbon fiber having a microstructure consisting of strip-like structural units extended in the longitudinal direction of the fiber, wherein the fractal dimension D of the arrangement of the strip-like structural units in the cross-section of the fiber has a fractal structure satisfying the requirement of the following formula (2) relatively to the observation scale r satisfying the requirement of the following formula (1) with respect to the cross-section of the fiber:E/2.5>r>E/25 (1)2.0>D>1.05 (2)wherein E in the formula (1) stands for a smallest principal radius of gyration of cross-sectional area of the cross-section of the fiber.Type: GrantFiled: January 23, 1991Date of Patent: September 8, 1992Assignee: Teijin LimitedInventors: Jiro Sadanobu, Akihiro Ohba, Tsutomu Nakamura
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Patent number: 5047292Abstract: A pitch-based carbon fiber having a microstructure consisting of strip-like structural units extended in the longitudinal direction of the fiber, wherein the fractal dimension D of the arrangement of the strip-like structural units in the cross-section of the fiber has a fractal structure satisfying the requirement of the following formula (2) relatively to the observation scale r satisfying the requirement of the following formula (1) with respect to the cross-section of the fiber:E/2.5>r>E/25 (1)2.0>D>1.05 (2)wherein E in the formula (1) stands for a smallest principal radius of gyration of cross-sectional area of the cross-section of the fiber.Type: GrantFiled: December 7, 1988Date of Patent: September 10, 1991Assignee: Teijin LimitedInventors: Jiro Sadanobu, Akihiro Ohba, Tsutomu Nakamura
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Patent number: 4840762Abstract: A process for the preparation of high-performance grade carbon fibers, which comprises attaching a fine powder of at least one member selected from oxides and carbides of silicon, aluminum, titanium, and boron to a precursor fiber bundle of as spun pitch fibers, subjecting the fiber bundle to an infusibilization treatment, and subjecting the fiber bundle to a carbonization treatment.Type: GrantFiled: October 22, 1985Date of Patent: June 20, 1989Assignee: Teijin Ltd.Inventors: Toru Sawaki, Hideharu Sasaki, Tsutomu Nakamura, Jiro Sadanobu
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Patent number: 4539393Abstract: A process for producing an aromatic polyamide film, which comprises drawing an undrawn aromatic polyamide film biaxially at a draw ratio of at least 1.5 in a solvent mixture consisting of (a) 5% to 75% by weight of a good solvent of the aromatic polyamide and (b) 25% to 95% by weight of a non-solvent of the aromatic polyamide, and heat treating the drawn film, which contains at least 1% by weight, based on the weight of the film, of a good solvent of said aromatic polyamide, at a temperature of not lower than 150.degree. C.An m-phenyleneisophthalamide polymer film having extremely excellent dimensional stability under moist conditions, which film has a density d of from 1.35 to 1.41 g/cm.sup.3 and principal refractive indices n.sub..alpha., n.sub..beta. and n.sub..gamma. (n.sub..alpha. >n.sub..beta. >n.sub..gamma.Type: GrantFiled: April 5, 1983Date of Patent: September 3, 1985Assignee: Teijin LimitedInventors: Yorikazu Tamura, Jiro Sadanobu, Tsutomu Nakamura