Patents by Inventor Hirofumi Maeda

Hirofumi Maeda 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).

  • Publication number: 20100171891
    Abstract: Provided is a digitizer function-equipped liquid crystal display device capable of preventing the wire shadows of a loop antenna from being projected on a liquid crystal panel and capable of being applied to a large size liquid crystal panel. It is also possible to provide an information processing electronic device and a game device provided with the digitizer function-equipped liquid crystal display device.
    Type: Application
    Filed: May 19, 2008
    Publication date: July 8, 2010
    Applicant: KABUSHIKI KAISHA SEGA DOING BUSINESS AS SEGA CORP
    Inventors: Toshiyuki Kaji, Gou Hirose, Takayuki Ohnishi, Hirofumi Maeda
  • Publication number: 20100113842
    Abstract: Disclosed is a method for producing an alcohol from a lactone or a carboxylic acid ester, which enables to produce an alcohol from a lactone or a carboxylic acid ester under relatively mild conditions with high yield and high catalytic efficiency. This method also enables to produce an optically active alcohol from an optically active lactone or an optically active carboxylic acid ester. Specifically disclosed is a method for producing an alcohol by hydrogen reducing a lactone or a carboxylic acid ester in the presence of a catalyst containing ruthenium and a phosphine compound represented by the following general formula (1): wherein R1 represents a spacer; R2, R3, R4, R5, R6 and R7 independently represent a hydrogen atom, an alkyl group having 1-12 carbon atoms, an aryl group or a heterocyclic group; and R8, R9, R10, R11, R12 and R13 independently represent an alkyl group having 1-12 carbon atoms, an aryl group or a heterocyclic group.
    Type: Application
    Filed: April 2, 2008
    Publication date: May 6, 2010
    Applicants: KANEKA CORPORATION, TAKASAGO INTERNATIONAL CORPORATION
    Inventors: Hirofumi Maeda, Kenji Inoue, Takaji Matsumoto, Izuru Nagasaki, Ryoji Noyori, Susumu Saito
  • Publication number: 20090029429
    Abstract: The present invention relates to a process for producing an optically active 2-substituent-oxy-3-(4-substituent-oxyphenyl)propionic acid derivative which comprises stereoselectively reducing an 2-oxo-3-(4-substituent-oxyphenyl)propionic acid by an enzyme and subjecting the thus-obtained optically active 2-hydroxy-3-(4-substituent-oxyphenyl)propionic acid to esterification of the carboxyl group according to need, then to alkylation of the hydroxyl group and, if necessary, to deprotection of an ether type protective group. The present invention may make it possible to produce an optically active 2-substituent-oxy-3-(4-substituent-oxyphenyl)propionic acid derivative, which is useful as intermediates for the synthesis of medicinal compounds, efficiently, in a simple and easy manner, and commercially advantageously.
    Type: Application
    Filed: August 4, 2005
    Publication date: January 29, 2009
    Applicant: KANEKA CORPORATION
    Inventors: Tatsuya Honda, Hirofumi Maeda, Nobuo Nagashima, Shigeru Kawano, Yoshihiko Yasohara
  • Patent number: 7223859
    Abstract: The present invention provides a method for easily producing an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative useful for an intermediate for pharmaceutical products, particularly an inhibitor of a cholesteryl ester transfer protein (CETP) from easily available raw materials. In the present invention, (S)-N-[4-(trifluoromethyl)phenyl]-3-hydroxypentanoic acid amide prepared from easily available raw materials leads a production of (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone to give (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide. Furthermore, (R)-4-ethyl-1-[4-(trifluoromethyl)phenyl]-2-azetidinone is reacted with a carbamic acid ester to give an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: May 29, 2007
    Assignee: Pfizer Inc.
    Inventors: Tatsuyoshi Tanaka, Masanobu Sugawara, Hirofumi Maeda, Akira Nishiyama, Yoshihiko Yasohara, Nobuo Nagashima
  • Publication number: 20040199005
    Abstract: The present invention provides a method for easily producing an (R)-3-[4-(trifluoromethyl)phenylamino]-pentanoic acid amide derivative useful for an intermediate for pharmaceutical products, particularly an inhibitor of a cholesteryl ester transfer protein (CETP) from easily available raw materials.
    Type: Application
    Filed: March 16, 2004
    Publication date: October 7, 2004
    Applicant: KANEKA CORPORATION
    Inventors: Tatsuyoshi Tanaka, Masanobu Sugawara, Hirofumi Maeda, Akira Nishiyama, Yoshihiko Yoshohara, Nobuo Nagashima
  • Patent number: 5229049
    Abstract: A method for manufacturing pre-expanded particles of polyolefin resin from strand pellets having Tm in melting temperature measured by DSC method, wherein the expansion ratio E of the pre-expanded particles of the resin, the length l and the average diameter d of the strand pellets after having been heated at a temperature (Tm-5.degree. C.) are in the following relational expression.0.04E+0.9.ltoreq.l/d<0.15E+1.3According to the method of the present invention, it is possible to manufacture uniform, spherical pre-expanded particles easily at a moderate cost and obtain a fine-looking expansion-molded articles.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: July 20, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventor: Hirofumi Maeda
  • Patent number: 4968723
    Abstract: A pre-expanded particle of a non-crosslinked linear low density polyethylene having an average cell diameter as large as 120 to 1,200 .mu.m which can be molded, without further imparting an expandability prior to molding or without aging under pressure, by heating in a closed mold permeable to a fluid heating medium such as steam to form a well bonded unitary cellular molded article having a good appearance, a high expansion ratio and improved heat resistance and mechanical property with a slight volumetric shrinkage.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: November 6, 1990
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kenichi Senda, Masao Ando, Hirofumi Maeda
  • Patent number: 4861531
    Abstract: The present invention provides a process for production of expansion-molded articles in a mold of a linear low density polyethylene resin which comprises compressing pre-expanded linear low density polyethylene resin beads having two melting points when measured by differential scanning calorimetry and, when the melting point at a low temperature side and the melting point at a high temperature side are designated T.sub.ML and T.sub.MH respectively, between said two melting points and the peak fusion area at said T.sub.ML is designated A.sub.L and the peak fusion area at said T.sub.MH is designated A.sub.H satisfying:5%.ltoreq.A.sub.H /A.sub.L .ltoreq.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: August 29, 1989
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventor: Hirofumi Maeda
  • Patent number: 4830798
    Abstract: The present invention provides that, in a process for production of foamed articles of a polyproplene resin which comprises compressing pre-expanded beads of propylene resins under a gaseous pressure, filling a mold capable of closing but incapable of sealing with the compressed beads, then venting from the mold and heating and fusing with steam thereby to produce the molded article in the shape of the mold, the improvement wherein the pre-expanded beads of the polypropylene resins having two melting points when measured by differential scanning calorimetry and having a quantity of the peak fusion heat QH based on a melting point at a high temperature peak of the two melting points being 0.3 to 3.5 cal/g are introduced compressively into the mold so that a compressive rate is 10 to 60%.
    Type: Grant
    Filed: September 15, 1987
    Date of Patent: May 16, 1989
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventor: Hirofumi Maeda
  • Patent number: 4778829
    Abstract: A process for preparing pre-expanded particles of a thermoplastic resin, which comprises heating an aqueous dispersion of thermoplastic resin particles containing a volatile blowing agent to a high temperature under pressure in a pressure vessel, and releasing the dispersion into an atmosphere maintained at a lower pressure than the pressure in the pressure vessel and at a temperature of not lower than 40.degree. C. According to the process of the present invention, there can be obtained pre-expanded thermoplastic resin particles with a large average diameter of cells. By molding the pre-expanded particles obtained by the present invention, molded articles which are small in dimensional shrinkage and excellent in surface appearance can be obtained without imparting expandability to the particles or aging the particles under pressure prior to molding.
    Type: Grant
    Filed: August 11, 1987
    Date of Patent: October 18, 1988
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Tadayuki Ichimura, Kenichi Senda, Masao Ando, Hirofumi Maeda
  • Patent number: 4687641
    Abstract: A process and apparatus for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and simultaneously recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent into the air is prevented.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: August 18, 1987
    Assignee: Kanegafuchi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Maeda, Kyoichi Nakamura, Hisatoshi Fukui
  • Patent number: 4686087
    Abstract: A process and apparatus for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel and the space is sealed with an aqueous medium which exists in the lower portion of the vessel and communicates with the outside of the vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and sinking the resulting pre-expanded particles under the aqueous medium by means of a rotary impeller provided in the pressure vessel so that the pre-expanded particles are taken out of the low-pressure vessel through the aqueous medium towards the outside of the vessel, while recovering the foaming agent volatilized from the thermoplastic resin par
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: August 11, 1987
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Maeda, Kyoichi Nakamura, Toshihiro Hatamoto
  • Patent number: 4682989
    Abstract: The present invention provides a method of recovering volatile foaming agent contained in prefoamed beads of polyolefin resin characterized in that the volatile foaming agent contained in the prefoamed beads is recovered by bringing into contact with heated air prefoamed beads obtained by heating polyolefin resin beads containing the volatile foaming agent. According to the invented method it is possible to avoid not only aggravation of the working environments and atmospheric pollution but also risk of explosion etc. and, furthermore, material cost can be saved through reutilization of the recovered volatile foaming agent.
    Type: Grant
    Filed: October 21, 1985
    Date of Patent: July 28, 1987
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Maeda, Naruhiko Akamatsu
  • Patent number: 4631159
    Abstract: A method for aging an expansion-molded body of polyolefin prepared by heating pre-expanded polyolefin particles within a mold involves cooling the molded body within the mold so that the molded body is not substantially smaller than the volume of the mold cavity and is temporarily expandable after being removed from the mold to not more than 110% relative to the volume in the mold cavity, removing the molded body from the mold, placing the molded body in an atmosphere substantially under atmospheric pressure and having a temperature of 25.degree. to 55.degree. C. lower than the melting point of the polyolefin while the volume of the molded body is 70 to 110% relative to the volume of the mold cavity and holding the molded body in this atmosphere until the temperature of the molded body is at least equal to the temperature of the atmosphere.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: December 23, 1986
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Maeda, Kazuyoshi Watanabe, Naruhiko Akamatsu, Kenichi Senda, Shunichi Nishioka
  • Patent number: 4525485
    Abstract: A process for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and simultaneously recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent into the air is prevented.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: June 25, 1985
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Maeda, Kyoichi Nakamura, Hisatoshi Fukui
  • Patent number: 4524154
    Abstract: A process for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel and the space is sealed with an aqueous medium which exists in the lower portion of the vessel and communicates with the outside of the vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and sinking the resulting pre-expanded particles under the aqueous medium by means of a rotary impeller provided in the pressure vessel so that the pre-expanded particles are taken out of the low-pressure vessel through the aqueous medium towards the outside of the vessel, while recovering the foaming agent volatilized from the thermoplastic resin particles by disc
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: June 18, 1985
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hirofumi Maeda, Kyoichi Nakamura, Toshihiro Hatamoto