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).

  • Patent number: 8906526
    Abstract: 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: Grant
    Filed: November 11, 2010
    Date of Patent: December 9, 2014
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Fumio Takei, Masao Tomoi
  • Patent number: 7927756
    Abstract: 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: Grant
    Filed: August 15, 2006
    Date of Patent: April 19, 2011
    Assignee: Fujitsu Limited
    Inventors: Seiji Hibino, Masami Tsutsumi, Kensuke Yoshida, Hiroaki Yoshida, Yoichi Takasu, Nawalage Florence Cooray, Fumio Takei
  • Publication number: 20110070525
    Abstract: 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: Application
    Filed: November 11, 2010
    Publication date: March 24, 2011
    Applicant: FUJITSU LIMITED
    Inventors: Nawalage Florence COORAY, Fumio TAKEI, Masao TOMOI
  • Patent number: 7858215
    Abstract: 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: Grant
    Filed: March 1, 2006
    Date of Patent: December 28, 2010
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Fumio Takei, Masao Tomoi
  • Patent number: 7597980
    Abstract: 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: Grant
    Filed: March 16, 2005
    Date of Patent: October 6, 2009
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Fumio Takei, Norio Sawatari, Masao Tomoi
  • Patent number: 7544436
    Abstract: 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: Grant
    Filed: September 12, 2007
    Date of Patent: June 9, 2009
    Assignee: Fujitsu Limited
    Inventors: Makoto Yoshino, Seiji Hibino, Hiroaki Yoshida, Nawalage Florence Cooray, Fumio Takei
  • Patent number: 7097366
    Abstract: 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: Grant
    Filed: November 18, 2004
    Date of Patent: August 29, 2006
    Assignee: Fujitsu Limited
    Inventors: Tsuyoshi Aoki, Masayuki Kato, Yasuo Yamagishi, Tomoyuki Akahoshi, Nawalage Florence Cooray, Mamoru Kurashina
  • Patent number: 7037614
    Abstract: 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: Grant
    Filed: June 29, 2005
    Date of Patent: May 2, 2006
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Fumio Takei, Masao Tomoi
  • Patent number: 6916539
    Abstract: 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: Grant
    Filed: August 9, 2002
    Date of Patent: July 12, 2005
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
  • Patent number: 6893681
    Abstract: 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: Grant
    Filed: September 27, 2002
    Date of Patent: May 17, 2005
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Kanae Nakagawa, Masataka Mizukoshi
  • Patent number: 6749927
    Abstract: 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: Grant
    Filed: January 11, 2002
    Date of Patent: June 15, 2004
    Assignee: Fujitsu Limited
    Inventor: Nawalage Florence Cooray
  • Publication number: 20030211328
    Abstract: 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: Application
    Filed: August 9, 2002
    Publication date: November 13, 2003
    Applicant: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
  • Publication number: 20030090345
    Abstract: 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: Application
    Filed: September 27, 2002
    Publication date: May 15, 2003
    Inventors: Nawalage Florence Cooray, Kanae Nakagawa, Masataka Mizukoshi
  • Patent number: 6486235
    Abstract: 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: Grant
    Filed: December 7, 2000
    Date of Patent: November 26, 2002
    Assignee: Fujitsu Limited
    Inventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka
  • Publication number: 20020131247
    Abstract: 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: Application
    Filed: January 11, 2002
    Publication date: September 19, 2002
    Applicant: FUJITSU LIMITED
    Inventor: Nawalage Florence Cooray
  • Publication number: 20020076535
    Abstract: 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: Application
    Filed: June 28, 2001
    Publication date: June 20, 2002
    Applicant: FUJITSU LIMITED
    Inventor: Nawalage Florence Cooray
  • Publication number: 20010049009
    Abstract: 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: Application
    Filed: December 7, 2000
    Publication date: December 6, 2001
    Inventors: Nawalage Florence Cooray, Koji Tsukamoto, Takeshi Ishitsuka