Patents by Inventor Yutaka Taketani
Yutaka Taketani 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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Publication number: 20050256293Abstract: A flame retardant resin composition consisting essentially of: (A) 100 parts by weight of the total of resin components (components A) which include at least 60 wt % of an aromatic polyester resin; (B) an organic phosphorus compound (component B-1) represented by the following general formula (1) and having an acid value of 0.7 mgKOH/g or less or an organic phosphorus compound (component B-2) represented by the following general formula (2); (C) 0 to 50 parts by weight of a flame retardancy improving resin (component C); and (D) 0 to 200 parts by weight of a filler (component D), and a molded article thereof. Wherein, when the organic phosphorus compound is the component B-1, the amount of the component B-1 is 1 to 100 parts by weight and when the organic phosphorus compound is the component B-2, the component B-2 is used in combination with a biscumyl compound (component B-3), the amount of the component B-2 is 5 to 30 parts by weight, and the amount of the component B-3 is 0.01 to 5 parts by weight.Type: ApplicationFiled: June 15, 2005Publication date: November 17, 2005Inventors: Katsuhiro Yamanaka, Yutaka Taketani
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Publication number: 20050141174Abstract: A solid electrolytic capacitor constituted by forming a dielectric coating film, a solid state electrolyte layer, and cathode lead-out layer in order on the surface of an anode body comprising niobium or an alloy containing niobium as the main component to an end of which an anode lead member is implanted to construct a capacitor element, connecting the anode lead member with an anode terminal and connecting the cathode lead-out layer, at the same time, with a cathode terminal, and being covered and sealed by a sheath resin, in that the sheath resin is formed by injecting and filling liquid silicone resin and heat curing molding the same.Type: ApplicationFiled: September 7, 2004Publication date: June 30, 2005Applicants: SANYO ELECTRIC CO., LTD., SUN ELECTRONIC INDUSTRIES CORP.Inventors: Yutaka Taketani, Yoshiaki Hasaba, Makoto Sakamaki, Tadahito Ito
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Publication number: 20050030678Abstract: A manufacturing method according to the present invention of a solid electrolytic capacitor includes: a step of immersing a anode body on which the dielectrics film layer is formed in a solution that includes from 0.7 to 10% by weight of hydrogen peroxide, from 0.3 to 3% by weight of sulfuric acid and water as a main solvent, followed by, after pulling up, exposing to vapor of pyrrole or a pyrrole derivative, and thereby forming, on the dielectrics film layer, a first conductive polymer layer made of polypyrrole or a polypyrrole derivative; and a step of immersing the anode body on which the dielectrics film layer and the first conductive polymer layer are formed in a solution that includes a polymerizing monomer and a supporting electrolyte to electrolytically polymerize the polymerizing monomer, and thereby forming a second conductive polymer layer on the first conductive polymer layer.Type: ApplicationFiled: August 12, 2002Publication date: February 10, 2005Inventors: Yutaka Taketani, Yoshiaki Hasaba, Makoto Sakamaki, Tadahito Ito
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Publication number: 20040132876Abstract: A flame retardant resin composition comprising:Type: ApplicationFiled: December 17, 2003Publication date: July 8, 2004Inventors: Katsuhiro Yamanaka, Kazuhiko Koya, Yutaka Taketani
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Publication number: 20040127611Abstract: A flame retardant resin composition consisting essentially of:Type: ApplicationFiled: October 31, 2003Publication date: July 1, 2004Inventors: Katsuhiro Yamanaka, Yutaka Taketani
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Patent number: 6333437Abstract: A method for purifying a bromine compound by depositing the bromine compound represented by the following general formula (1) as solid particles from a crude solution containing the bromine compound: wherein (i) the crude solution is supplied into the slurry containing the particles of the bromine compound; (ii) the concentration of the particles of the bromine compound in the slurry is maintained at a predetermined range; (iii) the solvent contained in the slurry is a mixed solvent of a good solvent and a poor solvent and the ratio of the good solvent to the poor solvent is maintained at a predetermined value; and (iv) the solid particles of the bromine compound are separated from the slurry.Type: GrantFiled: September 7, 2000Date of Patent: December 25, 2001Assignee: Teijin Chemicals LTDInventors: Yutaka Taketani, Haruhisa Hoshimi, Akihiro Mukai, Yasuhisa Tahira, Takahiro Sato
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Patent number: 6313979Abstract: The invention provides a process for producing solid electrolyte capacitors by forming a dielectric oxide film and a first cathode layer of solid conductive substance over the surface of an anode body of valve metal, and forming a second cathode layer of conductive high polymer on the first cathode layer by electrolytic oxidative polymerization. The second cathode layer is formed by immersing in the electrolyte the anode body formed over the surface thereof with the oxide film and the first cathode layer, feeding a positive voltage with an external electrode piece in contact with the first cathode layer in the electrolyte, and shifting the feeding point at a predetermined time interval.Type: GrantFiled: November 8, 2000Date of Patent: November 6, 2001Assignees: Sanyo Electric Co., Ltd., Sanyo Electronic Components Co., Ltd.Inventors: Yutaka Taketani, Kakusyo Yoshida, Hidenori Kamigawa, Yasuhiro Kishimoto, Youichi Kojima, Takeshi Takamatsu
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Patent number: 6168639Abstract: The invention provides a process for producing solid electrolyte capacitors by forming a dielectric oxide film and a first cathode layer of solid conductive substance over the surface of an anode body of valve metal, and forming a second cathode layer of conductive high polymer on the first cathode layer by electrolytic oxidative polymerization. In forming the second cathode layer, the pH of the electrolyte to be used for electrolytic oxidative polymerization is maintained within a predetermined range by adding an acid or alkali to the electrolyte. Since the pH of the electrolyte remains substantially unaltered by the polymerization according to the invention, the electrolyte is repeatedly usable while permitting the resulting second cathode layers to retain the desired electric conductivity.Type: GrantFiled: October 6, 1998Date of Patent: January 2, 2001Assignees: Sanyo Electric Co., Ltd., Sanyo Electronic Components Co., Ltd.Inventors: Yutaka Taketani, Kakusyo Yoshida, Hidenori Kamigawa, Yasuhiro Kishimoto, Youichi Kojima, Takeshi Takamatsu
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Patent number: 6036734Abstract: This invention relates to solid electrolyte capacitors and is intended to decrease the contact resistance between the body of the capacitor and lead frames and the internal resistance of these components The invention provides a process for producing a solid electrolyte capacitor by forming a dielectric oxide film on an anode body of valve metal, forming a cathode layer of solid conductive substance on the oxide film to prepare a capacitor element, coating the cathode layer of the capacitor element with a carbon layer, coating the carbon layer with a silver paste layer to prepare a capacitor body, and bonding a lead frame to the silver paste layer of the capacitor body with a silver adhesive. While the capacitor element coated with the carbon layer and a silver paste are being vibrated relative to each other, the capacitor element is dipped in the silver paste and withdrawn therefrom in the direction of the vibration, whereby the carbon layer is coated with the silver paste layer.Type: GrantFiled: October 8, 1998Date of Patent: March 14, 2000Assignees: Sanyo Electric Co., Ltd., Sanyo Electronic Components Co., Ltd.Inventors: Yutaka Taketani, Kakusyo Yoshida, Hidenori Kamigawa, Yasuhiro Kishimoto, Youichi Kojima, Takeshi Takamatsu, Hiroshi Yakui
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Patent number: 5998674Abstract: Method of producing a bromine compound having an aliphatic unsaturated bond which includes reacting a compound having an aliphatic unsaturated bond represented by the following general formula (1) with bromine:R.sup.1 --O--Ar.sup.1 --Y--Ar.sup.2 --O--R.sup.2 (1)to produce a bromine compound represented by the following formula (2):R.sup.3 --O--Ar.sup.1 --Y--Ar.sup.2 --O--R.sup.4 (2)wherein Ar.sup.1, Ar.sup.2 and Y are the same as defined in the above general formula (1) , and R.sup.3 and R.sup.4 are groups obtained by saturating the unsaturated groups of R.sup.1 and R.sup.2 in the above general formula (1) with bromine, respectively.The reaction is carried out in the presence of a solvent which is inactive in the reaction, and a substantial amount of the heat of reaction is removed from a reaction system by the vaporization of the solvent or bromine. A high-purity bromine compound in high yield which is useful as flame retardant, can be obtained.Type: GrantFiled: August 21, 1998Date of Patent: December 7, 1999Assignee: Teijin Chemicals, Ltd.Inventors: Yutaka Taketani, Haruhisa Hoshimi, Masanori Monri, Seiichi Tanabe, Yasuhiro Shimidzu
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Patent number: 5561180Abstract: The present invention is to provide polycarbonate film excellent in optical properties such as high transparency and a process for producing it. The present invention relates to polycarbonate film having a specific retardation values, and a process for producing polycarbonate film by casting a dope onto a support and evaporating the solvent with heat wherein the dope is prepared by dissolving 10 parts by weight of polycarbonate resin in 30 to 150 parts by weight of the solvent mixture which contains more than 60% by weight of dioxolane.Type: GrantFiled: May 16, 1995Date of Patent: October 1, 1996Assignee: Teijin LimitedInventors: Yutaka Taketani, Kaoru Iwata, Hideaki Nitta, Utami Yonemura, Takeshi Sasaki
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Patent number: 5478518Abstract: The present invention is to provide a polycarbonate film excellent in optical properties such as high transparency and a process for producing it. The present invention relates to a polycarbonate film having a specific retardation value, and a process for producing a polycarbonate film by casting a dope onto a support and evaporating the solvent with heat wherein the dope is prepared by dissolving 10 parts by weight of polycarbonate resin in 30 to 150 parts by weight of the solvent mixture which contains more than 60% by weight of dioxolane.Type: GrantFiled: March 18, 1994Date of Patent: December 26, 1995Assignee: Teijin LimitedInventors: Yutaka Taketani, Kaoru Iwata, Hideaki Nitta, Utami Yonemura, Takeshi Sasaki
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Patent number: 5196147Abstract: An organic nonlinear optical substance having the formula (I): ##STR1## wherein R.sup.1 represents --H or --CH.sub.3 ;n is 0, 1, or 2;A represents Z.sup.1 --Ar, ##STR2## wherein Ar represents a 6-14 membered aromatic group including a heterocyclic ring or bisphenylene type ring; Z.sup.1 represents H--, R.sup.5 R.sup.6 N--, R.sup.7 O--, R.sup.8 S--, NC--, R.sup.9 OCO--, R.sup.10 COO--, O.sub.2 N--, R.sup.11 R.sup.12 NOC, R.sup.13 CO(R.sup.14)N--, or R.sup.15 --; Z.sup.2, Z.sup.3, and Z.sup.4 independently represent H--, a C.sub.1 -C.sub.8 alkyl--, R.sup.16 O--, R.sup.17 R.sup.18 N, R.sup.19 S--, O.sub.2 N--, or two R.sup.16 being, in combination, R.sup.20 CH<; R.sup.2 represents H-- or a C.sub.1 -C.sub.12 alkyl; R.sup.5 to R.sup.20 independently represent H--, or a C.sub.1 -C.sub.10 hydrocarbon residue; Z.sup.5 independently represents H--, a C.sub.1 -C.sub.8 saturated hydrocarbon residue, O.sub.2 N--, R.sup.21 O--, R.sup.22 S--, NC--, or R.sup.23 R.sup.24 N-- wherein R.sup.21 to R.sup.Type: GrantFiled: March 28, 1989Date of Patent: March 23, 1993Assignee: Teijin LimitedInventors: Yutaka Taketani, Hiroshi Matsuzawa, Kaoru Iwata
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Patent number: 4353802Abstract: A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, the polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole % of a recurring unit of the formula ##STR1## wherein all symbols are as defined herein, and having at least 0.5 milliequivalent, per gram of said polymer, of an amino group containing 1 or 2 active hydrogen atoms, with a polyfunctional compound containing at least two functional groups capable of reacting with the amino group having 1 or 2 active hydrogen atoms; and a process for preparing the same. The semipermeable composite membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.Type: GrantFiled: October 18, 1979Date of Patent: October 12, 1982Assignee: Teijin LimitedInventors: Shigeyoshi Hara, Yuzuru Hayashi, Takeyuki Kawaguchi, Noriaki Sasaki, Yutaka Taketani, Hiroyoshi Minematsu
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Patent number: 4302336Abstract: A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of a microporous substrate, said polymeric material being prepared by crosslinking a soluble polymer containing at least 30 mole % of a recurring unit of the formula ##STR1## wherein all symbols are as defined in claim 1, and having at least 0.2 milliequivalent, per gram of said polymer, of an amino group containing 1 or 2 active hydrogen atoms, with a polyfunctional compound containing at least two functional groups capable of reacting with the amino group having 1 or 2 active hydrogen atoms; and a process for preparing the same. The semipermeable composite membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.Type: GrantFiled: September 4, 1979Date of Patent: November 24, 1981Assignee: Teijin LimitedInventors: Takeyuki Kawaguchi, Yutaka Taketani, Noriaki Sasaki, Hiroyoshi Minematsu, Yuzuru Hayashi, Shigeyoshi Hara
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Patent number: 4265745Abstract: A permselective membrane comprising a thin permselective film of a polymeric material, said polymeric material being prepared by cross-linking a polyaddition product between a polyepoxy compound and a polyamino compound having at least two amino groups capable of reacting with epoxy groups with a polyfunctional compound selected from the group consisting of aromatic, heterocyclic and alicyclic compounds containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate and acid anhydride groups; and a process for producing the same. The permselective membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.Type: GrantFiled: May 18, 1978Date of Patent: May 5, 1981Assignee: Teijin LimitedInventors: Takeyuki Kawaguchi, Yutaka Taketani, Yuzuru Hayashi, Tomoyoshi Ono, Koh Mori
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Patent number: 4260652Abstract: A process and composition for producing a permselective composite membrane. The process comprises dissolving a specified imidazolone ring-containing aromatic polymer in an aqueous liquid medium containing a water-miscible amine having a pKa of more than 5.0 in a concentration of at least 5% by weight, coating the polymer solution on a microporous substrate, and drying the coating to form an ultrathin film on the substrate. The permselective composite membrane obtained is especially useful as a reverse osomsis membrane.Type: GrantFiled: June 5, 1978Date of Patent: April 7, 1981Assignee: Teijin LimitedInventors: Yutaka Taketani, Yuzuru Hayashi, Takeyuki Kawaguchi, Tomoyoshi Ono, Ko Mori
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Patent number: 4242208Abstract: A semipermeable composite membrane comprising a thin semipermeable film of a polymeric material deposited on one side of the microporous substrate, said polymeric material being prepared by interfacial crosslinking of a polymer containing a recurring unit of the formula ##STR1## wherein each of R.sub.1 and R.sub.2 represents a hydrogen atom or a methyl group, and W.sub.1 represents a direct bonding or a sulfonyl group (--SO.sub.2 --), with a polyfunctional compound containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate, N-haloformyl, haloformate and acid anhydride groups; and a process for producing the same. The semipermeable composite membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.Type: GrantFiled: May 16, 1979Date of Patent: December 30, 1980Assignee: Teijin LimitedInventors: Takeyuki Kawaguchi, Yutaka Taketani, Hiroyoshi Minematsu, Noriaki Sasaki, Yuzuru Hayashi, Shigeyoshi Hara
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Patent number: 4101458Abstract: An electrolyte for electrolytic capacitors comprising N-ethylformamide or its mixture with any other solvent containing at least about 10% by weight of N-ethylformamide and an acid salt of maleic acid with ammonia or an amine. The electrolyte can be used in electrolytic capacitors designed to operate in a temperature range of about -65.degree. to 100.degree. C.Type: GrantFiled: December 21, 1976Date of Patent: July 18, 1978Assignee: Sanyo Electric Co., Ltd.Inventors: Yutaka Taketani, Shinichi Niwa
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Patent number: 4086209Abstract: Novel substantially linear, or at least partially cross-linked, nitrogen-containing polymers having an aryleneimine or arylenether unit in the main chain with an amino group or a group derived from it being bonded as a pendant group to a nuclear carbon atom of the arylene group of the above unit. According to the number and type of the pendant groups, the polymers can have various useful properties such as thermal stability, hydrophilicity, oxidative reducibility, photosensitivity, color formability or the ability to form coordination bonds. Furthermore, the polymers have good solubility in aprotic polar organic solvents. Permselective membranes having good performance can be prepared from solutions of the polymers in these solvents.Type: GrantFiled: February 20, 1975Date of Patent: April 25, 1978Assignee: Teijin LimitedInventors: Shigeyoshi Hara, Masao Senoo, Koh Mori, Yutaka Taketani