Patents by Inventor Nawalage Florence Cooray
Nawalage Florence Cooray 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: 8906526Abstract: An electrolyte composition that shows low methanol cross-over and exhibits high proton conductivity when used as a solid electrolyte for solid polymer fuel cells or the like, and a solid electrolyte membrane and a solid polymer fuel cell that use the electrolyte composition are provided. This electrolyte composition comprises a perfluorocyclobutane-containing polymer having a specific structure. High proton conductivity is provided by sulfonic acid groups connected to the benzene rings. Reduction of methanol crossover is realized by introduction of a rigid structure with aromatic rings, or a combination o a rigid structure with aromatic rings and a three-dimensional cross-linked structure.Type: GrantFiled: November 11, 2010Date of Patent: December 9, 2014Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Fumio Takei, Masao Tomoi
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Patent number: 7927756Abstract: In the present invention, a material having a structure represented by formula (1) or (2) (wherein W equals N or C) is used as a solid electrolyte for a fuel cell. An electrolyte membrane having a small fuel crossover and a fuel cell having excellent ion conductivity and service capacity are obtained.Type: GrantFiled: August 15, 2006Date of Patent: April 19, 2011Assignee: Fujitsu LimitedInventors: Seiji Hibino, Masami Tsutsumi, Kensuke Yoshida, Hiroaki Yoshida, Yoichi Takasu, Nawalage Florence Cooray, Fumio Takei
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Publication number: 20110070525Abstract: An electrolyte composition that shows low methanol cross-over and exhibits high proton conductivity when used as a solid electrolyte for solid polymer fuel cells or the like, and a solid electrolyte membrane and a solid polymer fuel cell that use the electrolyte composition are provided. This electrolyte composition comprises a perfluorocyclobutane-containing polymer having a specific structure. High proton conductivity is provided by sulfonic acid groups connected to the benzene rings. Reduction of methanol crossover is realized by introduction of a rigid structure with aromatic rings, or a combination o a rigid structure with aromatic rings and a three-dimensional cross-linked structure.Type: ApplicationFiled: November 11, 2010Publication date: March 24, 2011Applicant: FUJITSU LIMITEDInventors: Nawalage Florence COORAY, Fumio TAKEI, Masao TOMOI
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Patent number: 7858215Abstract: A method for manufacturing a solid electrolyte membrane made from an electrolyte composition that shows low methanol cross-over and exhibits high proton conductivity. The method includes applying an electrolyte composition including an organic solvent and a perfluorocyclobutane-containing polymer having a specific structure onto a substrate, and then removing the solvent. High proton conductivity is provided by sulfonic acid groups connected to the benzene rings. Reduction of methanol crossover is realized by introduction of a rigid structure with aromatic rings, or a combination of a rigid structure with aromatic rings and a three-dimensional cross-linked structure.Type: GrantFiled: March 1, 2006Date of Patent: December 28, 2010Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Fumio Takei, Masao Tomoi
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Patent number: 7597980Abstract: A solid electrolyte membrane for solid polymer fuel cells, or the like is provided that is chemically stable in a strong acid atmosphere, and has low methanol cross-over as well as high proton conductivity. The solid electrolyte membrane is manufactured, using an electrolyte composition comprising a sulfonic acid group-containing polymer having a specific triazine structure. This polymer can be synthesized, for example, from a sulfonic acid group-containing dihydroxy compound having a triazine structure, and a difluoride.Type: GrantFiled: March 16, 2005Date of Patent: October 6, 2009Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Fumio Takei, Norio Sawatari, Masao Tomoi
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Patent number: 7544436Abstract: A direct methanol type fuel cell is provided with a generated gas ejection part having a bundle made up of hollow fiber membranes extending between a fuel electrode and a liquid fuel vaporizing layer that vaporizes a methanol aqueous solution and supplies methanol gas to the fuel electrode. The hollow fiber membranes selectively pass carbon dioxide within a mixture gas that includes methanol, the carbon dioxide generated at the fuel electrode and the like, and eject the carbon dioxide via end portions of the hollow fiber membranes that open at a side surface of the fuel cell via hollow portions. The fuel cell has a high carbon dioxide ejection capability, and suppresses leak of methanol gas. A pressure applying part may be provided to apply a back pressure to the methanol aqueous solution within a fuel storage part, so as to further improve the carbon dioxide ejection capability.Type: GrantFiled: September 12, 2007Date of Patent: June 9, 2009Assignee: Fujitsu LimitedInventors: Makoto Yoshino, Seiji Hibino, Hiroaki Yoshida, Nawalage Florence Cooray, Fumio Takei
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Patent number: 7097366Abstract: An optoelectronic component is mounted at a precise position on a waveguide substrate so as to reduce loss in propagating light, and electrically connect electrodes on the waveguide substrate and the optoelectronic component. The waveguide substrate has an optical waveguide and a recessed portion for mounting the optoelectronic component, and electrodes are arranged on the recessed portion. A great number of globular elastic conductive particles are distributed on the bottom surface of the recessed portion. Thereafter, the optoelectronic component is placed in the recessed portion so as to press the globular elastic conductive particles, and alignment between the optical waveguide in the waveguide substrate and an optical waveguide in the optoelectronic component is adjusted. Then, the optoelectronic component is fixed to the waveguide substrate with an optical adhesive while the alignment is precisely adjusted.Type: GrantFiled: November 18, 2004Date of Patent: August 29, 2006Assignee: Fujitsu LimitedInventors: Tsuyoshi Aoki, Masayuki Kato, Yasuo Yamagishi, Tomoyuki Akahoshi, Nawalage Florence Cooray, Mamoru Kurashina
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Patent number: 7037614Abstract: An electrolyte composition that shows low methanol cross-over and exhibits high proton conductivity when used as a solid electrolyte for solid polymer fuel cells or the like, and a solid electrolyte membrane and a solid polymer fuel cell that use the electrolyte composition are provided. This electrolyte composition comprises a perfluorocyclobutane-containing polymer having a specific structure. High proton conductivity is provided by sulfonic acid groups connected to the benzene rings. Reduction of methanol crossover is realized by introduction of a rigid structure with aromatic rings, or a combination o a rigid structure with aromatic rings and a three-dimensional cross-linked structure.Type: GrantFiled: June 29, 2005Date of Patent: May 2, 2006Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Fumio Takei, Masao Tomoi
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Patent number: 6916539Abstract: A halogen-free, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin, (2) a curing agent for the epoxy resin, (3) a phosphate of a resorcinol type, (4) aluminum hydroxide, and (5) a cure accelerator for the epoxy resin. The composition displays necessary flame retardant properties and sufficient insulating properties after the formation of an insulating layer in a circuit board, withstands a plating process, and does not cause the bleedout of the insulation layer formed. A circuit board with flame retardant properties comprising insulation layers formed of the epoxy resin composition is also disclosed.Type: GrantFiled: August 9, 2002Date of Patent: July 12, 2005Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
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Patent number: 6893681Abstract: A process to manufacture a surface-conductive resin in a short time at a low cost without damaging the main chain of a polymer is provided. The process for manufacturing surface-conductive resin comprises partially substituting a reactive group in at least one of a resin precursor and a semi-cured resin having at least one reactive group partially substitutable under alkaline condition by an alkali metal ion solution, exchanging the substituted alkali metal ion with the ion of a conductive material in the ionic solution, reducing the ion of the conductive material to deposit the conductive layer, then curing the resin, to get surface-conductive polymer/resin.Type: GrantFiled: September 27, 2002Date of Patent: May 17, 2005Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Kanae Nakagawa, Masataka Mizukoshi
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Patent number: 6749927Abstract: A dielectric resin composition comprising at least one type of epoxy resin and at least one type of cyanate ester which would react with said epoxy resin, together with a metal ion catalyst system, the ratio of the epoxy functional groups of said epoxy resin to the cyanate groups of said cyanate ester being in the range of from 1:0.8 to 1:1.4. Alternatively, a dielectric resin composition according to the invention may comprise a polyimide resin with side chain epoxy groups, a cyanate ester with two or more cyanate groups in the molecule, and a metal ion catalyst system. A multilayer circuit board having a multilayer structure comprising a core substrate and a required number of dielectric layers and wiring layers stacked alternately, wherein at least one of the dielectric layers is formed from a dielectric resin composition of the invention, is also disclosed.Type: GrantFiled: January 11, 2002Date of Patent: June 15, 2004Assignee: Fujitsu LimitedInventor: Nawalage Florence Cooray
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Publication number: 20030211328Abstract: A halogen-free, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin, (2) a curing agent for the epoxy resin, (3) a phosphate of a resorcinol type, (4) aluminum hydroxide, and (5) a cure accelerator for the epoxy resin. The composition displays necessary flame retardant properties and sufficient insulating properties after the formation of an insulating layer in a circuit board, withstands a plating process, and does not cause the bleedout of the insulation layer formed. A circuit board with flame retardant properties comprising insulation layers formed of the epoxy resin composition is also disclosed.Type: ApplicationFiled: August 9, 2002Publication date: November 13, 2003Applicant: Fujitsu LimitedInventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
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Publication number: 20030090345Abstract: A process to manufacture a surface-conductive resin in a short time at a low cost without damaging the main chain of a polymer is provided. The process for manufacturing surface-conductive resin comprises partially substituting a reactive group in at least one of a resin precursor and a semi-cured resin having at least one reactive group partially substitutable under alkaline condition by an alkali metal ion solution, exchanging the substituted alkali metal ion with the ion of a conductive material in the ionic solution, reducing the ion of the conductive material to deposit the conductive layer, then curing the resin, to get surface-conductive polymer/resin.Type: ApplicationFiled: September 27, 2002Publication date: May 15, 2003Inventors: Nawalage Florence Cooray, Kanae Nakagawa, Masataka Mizukoshi
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Patent number: 6486235Abstract: A halogen-tree, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin, (2) a curing agent for the epoxy resin, (3) a phosphate of a resorcinol type, (4) aluminum hydroxide, and (5) a cure accelerator for the epoxy resin. The composition displays necessary flame retardant properties and sufficient insulating properties after the formation of an insulating layer in a circuit board, withstands a plating process, and does not cause the bleedout of the insulation layer formed. A circuit board with flame retardant properties comprising insulation layers formed of the epoxy resin composition is also disclosed.Type: GrantFiled: December 7, 2000Date of Patent: November 26, 2002Assignee: Fujitsu LimitedInventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
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Publication number: 20020131247Abstract: A dielectric resin composition comprising at least one type of epoxy resin and at least one type of cyanate ester which would react with said epoxy resin, together with a metal ion catalyst system, the ratio of the epoxy functional groups of said epoxy resin to the cyanate groups of said cyanate ester being in the range of from 1:0.8 to 1:1.4. Alternatively, a dielectric resin composition according to the invention may comprise a polyimide resin with side chain epoxy groups, a cyanate ester with two or more cyanate groups in the molecule, and a metal ion catalyst system. A multilayer circuit board having a multilayer structure comprising a core substrate and a required number of dielectric layers and wiring layers stacked alternately, wherein at least one of the dielectric layers is formed from a dielectric resin composition of the invention, is also disclosed.Type: ApplicationFiled: January 11, 2002Publication date: September 19, 2002Applicant: FUJITSU LIMITEDInventor: Nawalage Florence Cooray
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Publication number: 20020076535Abstract: A dielectric film is obtained by heat curing a thermally curable fluorinated o-aminophenol polymer or oligomer based on an o-aminophenol compound and an aromatic dicarboxylic acid compound, at least one of which is mono- or poly-fluorinated, and having thermosetting groups at both ends that undergo cross-linking reaction upon thermal treatment. The dielectric film is employed in multilayer circuit boards.Type: ApplicationFiled: June 28, 2001Publication date: June 20, 2002Applicant: FUJITSU LIMITEDInventor: Nawalage Florence Cooray
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Publication number: 20010049009Abstract: A halogen-tree, flame-retardant insulating epoxy resin composition which comprises (1) an epoxy resin, (2) a curing agent for the epoxy resin, (3) a phosphate of a resorcinol type, (4) aluminum hydroxide, and (5) a cure accelerator for the epoxy resin. The composition displays necessary flame retardant properties and sufficient insulating properties after the formation of an insulating layer in a circuit board, withstands a plating process, and does not cause the bleedout of the insulation layer formed. A circuit board with flame retardant properties comprising insulation layers formed of the epoxy resin composition is also disclosed.Type: ApplicationFiled: December 7, 2000Publication date: December 6, 2001Inventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka