Patents by Inventor Michio Okamura

Michio Okamura 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: 20200239718
    Abstract: An aqueous ink jet composition of the present disclosure includes: at least one dye selected from the group consisting of C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of an ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of a polyalkylene glycol; and an anionic dispersant.
    Type: Application
    Filed: January 29, 2020
    Publication date: July 30, 2020
    Inventors: Kenji KITADA, Hiroko HAYASHI, Yasunari IKEDA, Hisashi OKAMURA, Kenta KIKUCHI, Hirofumi HOKARI, Shinichi NAITO, Kazumasa OTSUKI, Michio NAKAMORI, Shinichi YAMAMOTO, Seiji KAGAMI, Shigeki KAWADA
  • Publication number: 20200207999
    Abstract: An aqueous ink jet composition contains: C.I. Disperse Red 364; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of the ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of the polyalkylene glycol; and an anionic dispersant.
    Type: Application
    Filed: December 26, 2019
    Publication date: July 2, 2020
    Inventors: Hisashi OKAMURA, Hiroko HAYASHI, Kenji KITADA, Yasunari IKEDA, Hirofumi HOKARI, Shinichi YAMAMOTO, Michio NAKAMORI, Shigeki KAWADA, Kenta KIKUCHI, Kazumasa OTSUKI, Seiji KAGAMI, Shinichi NAITO
  • Patent number: 7705567
    Abstract: A capacitor power source 1 including a plurality of capacitors comprises: an inflection-point voltage detection circuit (11) for detecting the inflection-point voltage of the capacitor based on a set voltage Vbot; an overvoltage detection circuit (12) for detecting the overvoltage Vful of the capacitor; and an initialization circuit (13) for putting charging current of the capacitor into bypass operation using initialization voltage Vini when an initialization mode is selected, wherein charging/discharging control is performed such that a discharging stop signal is generated based on a detection signal of the inflection-point voltage of any one of the plurality of capacitors, a charging stop signal is generated based on a detection signal of the overvoltage of any one of the plurality of capacitors, and an end signal of the initialization charging is generated based on a plurality of bypass operation signals.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: April 27, 2010
    Assignee: Power Systems Co., Ltd.
    Inventors: Michio Okamura, Atsushi Shimizu
  • Publication number: 20070279010
    Abstract: A capacitor power source 1 including a plurality of capacitors comprises: an inflection-point voltage detection circuit 11 for detecting the inflection-point voltage of the capacitor based on a set voltage Vbot; an overvoltage detection circuit 12 for detecting the overvoltage Vful of the capacitor; and an initialization circuit 13 for putting charging current of the capacitor into bypass operation using initialization voltage Vini when an initialization mode is selected, wherein charging/discharging control is performed such that a discharging stop signal is generated based on a detection signal of the inflection-point voltage of any one of the plurality of capacitors, a charging stop signal is generated based on a detection signal of the overvoltage of any one of the plurality of capacitors, and an end signal of the initialization charging is generated based on a plurality of bypass operation signals.
    Type: Application
    Filed: May 10, 2007
    Publication date: December 6, 2007
    Applicant: Power Systems Co., Ltd.
    Inventors: Michio Okamura, Atsushi Shimizu
  • Patent number: 7286334
    Abstract: The invention is intended to reduce expansion proportion of electric double layer capacitors by combining nonporous carbonaceous electrodes produced by a specific method with an electrolyte of a specific structure. Provided is an electric double layer capacitor comprising nonporous carbonaceous electrodes soaked in an organic electrolytic solution, wherein the organic electrolytic solution contains a pyrrolidinium compound salt as a solute, and wherein the carbonaceous electrodes are electrodes obtained by the method comprising a step of obtaining a carbon powder by prebaking a needle coke green powder under an inert atmosphere, baking the prebaked needle coke powder in the presence of alkali hydroxide under an inert atmosphere, and removing the alkali hydroxide; and a step of shaping the carbon powder.
    Type: Grant
    Filed: March 21, 2005
    Date of Patent: October 23, 2007
    Assignee: Power Systems Co., Ltd.
    Inventors: Hitoshi Nakamura, Michio Okamura
  • Publication number: 20070216425
    Abstract: A capacitor apparatus according to the present invention is configured to charge electric charge in capacitors C1 and C2 and discharge electric charge from the capacitors C1 and C2 at normal operation time. The capacitor apparatus includes an internal resistance detection means 2 for detecting the internal resistance value of the capacitors C1 and C2 and an inter-capacitor charging/discharging control means 1 for controlling charging/discharging operation between the capacitors C1 and C2. When the internal resistance detection means 2 detects a resistance value more than a predetermined value, the inter-capacitor charging/discharging control means 1 performs charging/discharging control between the capacitors C1 and C2 to cause the capacitors C1 and C2 to self-heat.
    Type: Application
    Filed: February 20, 2007
    Publication date: September 20, 2007
    Applicant: Power Systems Co., Ltd.
    Inventors: Michio Okamura, Takao Muto, Atsushi Shimizu
  • Patent number: 7019960
    Abstract: The invention provides an electric double-layer capacitor sealed up by a flexible casing material that ensures a release of pressure upon an increasing internal pressure. A pressure release valve (1) is attached to the flexible casing material. The pressure release valve (1) comprises a collar airtightly joined to the flexible casing material and a cylindrical portion (3) connected to the collar, extending out of a capacitor enclosure. The cylindrical portion (3) comprises an end part (5) having a self-closing passage (6) that is opening to the outside only upon a pressure release and is closed up in a normal state, and a channel (4) in communication with the interior of the capacitor enclosure.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: March 28, 2006
    Assignees: Power Systems Co., Ltd., Japan Gore-Tex Inc., Kokoku Intech Co., Ltd.
    Inventors: Michio Okamura, Hitoshi Nakamura, Kotaro Kobayashi
  • Publication number: 20050219797
    Abstract: The invention is intended to reduce expansion proportion of electric double layer capacitors by combining nonporous carbonaceous electrodes produced by a specific method with an electrolyte of a specific structure. Provided is an electric double layer capacitor comprising nonporous carbonaceous electrodes soaked in an organic electrolytic solution, wherein the organic electrolytic solution contains a pyrrolidinium compound salt as a solute, and wherein the carbonaceous electrodes are electrodes obtained by the method comprising a step of obtaining a carbon powder by prebaking a needle coke green powder under an inert atmosphere, baking the prebaked needle coke powder in the presence of alkali hydroxide under an inert atmosphere, and removing the alkali hydroxide; and a step of shaping the carbon powder.
    Type: Application
    Filed: March 21, 2005
    Publication date: October 6, 2005
    Applicant: Power Systems Co., Ltd.
    Inventors: Hitoshi Nakamura, Michio Okamura
  • Publication number: 20050212493
    Abstract: Provided is a capacitor system which makes the best use of the performance of capacitors while reducing power loss. The capacitor system includes a plurality of capacitors, parallel monitors which are respectively connected in parallel to the capacitors and initialize voltages of the capacitors to a predetermined value, a plurality of changeover switches which function to switch a connection state of the capacitors connected in series, and a bank switching function of switching the connection state of the capacitors by alternately turning the changeover switches on and off to provide a predetermined voltage. The changeover switches are alternately turned on and off while maintaining a simultaneous ON time to ensure continuous flow of a charge/discharge current.
    Type: Application
    Filed: November 22, 2004
    Publication date: September 29, 2005
    Inventors: Tatsushi Yamaguchi, Takahiro Ootsuka, Nobuhide Furuya, Shigeru Watanabe, Michio Okamura
  • Publication number: 20050152091
    Abstract: The invention provides an electric double-layer capacitor sealed up by a flexible casing material that ensures a release of pressure upon an increasing internal pressure. A pressure release valve (1) is attached to the flexible casing material. The pressure release valve (1) comprises a collar airtightly joined to the flexible casing material and a cylindrical portion (3) connected to the collar, extending out of a capacitor enclosure. The cylindrical portion (3) comprises an end part (5) having a self-closing passage (6) that is opening to the outside only upon a pressure release and is closed up in a normal state, and a channel (4) in communication with the interior of the capacitor enclosure.
    Type: Application
    Filed: May 16, 2003
    Publication date: July 14, 2005
    Inventors: Michio Okamura, Hitoshi Nakamura, Kotaro Kobayashi
  • Patent number: 6885170
    Abstract: A connection-switched capacitor storage system comprises plural capacitors, parallel monitors connected with the capacitors, respectively, switches for switching the connections of the capacitors from a series combination to a parallel combination or vice versa, and a control portion. The parallel monitors bypass the charging current for the capacitors when the terminal voltages of the capacitors exceed a given voltage, thus limiting increases of the terminal voltages of initializing the terminal voltages of the capacitors to their original level. The control portion controls initialization and switching of the connections of the capacitors. The control portion causes the parallel monitors to initialize the capacitors near the voltage at which the connections of the capacitors are switched by the switches.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: April 26, 2005
    Assignees: Advanced Capacitor Technologies, Inc., Okamura Laboratory, Inc., Kabushiki Kaisha Powersystems
    Inventors: Michio Okamura, Masaaki Yamagishi
  • Patent number: 6738252
    Abstract: There is disclosed a carbon material from which an electric double layer capacitor (EDLC) having a large capacitance can be fabricated. First, a carbon material is activated to produce crystallites of graphite-like carbon having interlayer distances of 0.365 to 0.385 nm. Positive and negative plates are fabricated using the crystallites.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: May 18, 2004
    Assignee: Jeol, Ltd.
    Inventors: Michio Okamura, Makoto Takeuchi
  • Patent number: 6690775
    Abstract: A delivery-information management method which enables designation of a reception date and time by easy manipulation of a terminal or the like. Delivery information is recorded in a database. Next, an e-mail containing a scheduled delivery time and a telephone number for confirmation communication is transmitted to an e-mail address included in the delivery information. Thereafter, a telephone call to the telephone number for confirmation communication is received, and an originating telephone number which indicates a number assigned to a telephone line through which the telephone call is made is acquired. When the originating telephone number coincides with the telephone number of a recipient, a flag indicating that the delivery date and time are confirmed is set in the delivery information.
    Type: Grant
    Filed: February 12, 2003
    Date of Patent: February 10, 2004
    Assignee: Fujitsu Limited
    Inventor: Michio Okamura
  • Publication number: 20040008830
    Abstract: A delivery-information management method which enables designation of a reception date and time by easy manipulation of a terminal or the like. Delivery information is recorded in a database. Next, an e-mail containing a scheduled delivery time and a telephone number for confirmation communication is transmitted to an e-mail address included in the delivery information. Thereafter, a telephone call to the telephone number for confirmation communication is received, and an originating telephone number which indicates a number assigned to a telephone line through which the telephone call is made is acquired. When the originating telephone number coincides with the telephone number of a recipient, a flag indicating that the delivery date and time are confirmed is set in the delivery information.
    Type: Application
    Filed: February 12, 2003
    Publication date: January 15, 2004
    Applicant: Fujitsu Limited
    Inventor: Michio Okamura
  • Publication number: 20030128013
    Abstract: A connection-switched capacitor storage system comprises plural capacitors, parallel monitors connected with the capacitors, respectively, switches for switching the connections of the capacitors from a series combination to a parallel combination or vice versa, and a control portion. The parallel monitors bypass the charging current for the capacitors when the terminal voltages of the capacitors exceed a given voltage, thus limiting increases of the terminal voltages of initializing the terminal voltages of the capacitors to their original level. The control portion controls initialization and switching of the connections of the capacitors. The control portion causes the parallel monitors to initialize the capacitors near the voltage at which the connections of the capacitors are switched by the switches.
    Type: Application
    Filed: October 2, 2002
    Publication date: July 10, 2003
    Applicant: JEOL Ltd.
    Inventors: Michio Okamura, Masaaki Yamagishi
  • Publication number: 20030097333
    Abstract: An electronic money system is constructed by: a terminal apparatus of the user; a PHS electronic money card having an interface which can be connected to the terminal apparatus and a mobile phone function; and a bank server which is connected to the terminal apparatus via the Internet and connected to the PHS electronic money card via a mobile telephone network. Payment application in which a payment money amount and a payment date/time have been designated is notified to the bank server by the terminal apparatus. When the payment date/time having a time lag comes, a telephone call is made from the bank server to the PHS electronic money card. Establishment of a telephone talk connection is confirmed. Payment of electronic money is executed.
    Type: Application
    Filed: February 19, 2002
    Publication date: May 22, 2003
    Applicant: Fujitsu Limited
    Inventor: Michio Okamura
  • Patent number: 6487066
    Abstract: Disclosed is an electric double layer capacitor including polarizable electrodes immersed in an organic electrolyte, wherein a carbon material for forming the polarizable electrode is a carbon material including graphite-like microcrystalline carbon produced by effecting a heat treatment together with at least one of an alkali metal and an alkali metal compound at not less than a temperature at which alkali metal vapor is generated, and an electrostatic capacity is expressed by insertion of ions of a solute of the organic electrolyte into a space between microcrystalline carbon layers of the carbon material. Accordingly, it is possible to achieve an electrostatic capacity and a withstand voltage which exceed those of the conventional electric double layer capacitor based on the activated carbon system.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: November 26, 2002
    Assignees: NGK Insulators, Ltd., Jeol Ltd., Okamura Laboratory Inc.
    Inventors: Yusuke Niiori, Hiroyuki Katsukawa, Hitoshi Yoshida, Makoto Takeuchi, Michio Okamura
  • Patent number: 6462512
    Abstract: A capacitor storage system is provided which is simple in structure and can control the charge level according to the use environment and detect a fault, if any.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: October 8, 2002
    Assignees: JEOL Ltd., Okamura Laboratory, Inc., Kabushiki Kaisha Powersystems
    Inventor: Michio Okamura
  • Patent number: 6447555
    Abstract: There is disclosed an electric double-layer capacitor that is adapted for use in an electric vehicle, for example, and uses aluminum collector electrodes. A native oxide film is formed on each aluminum electrode. Hard granular carbon is made to penetrate through the oxide film into each aluminum electrode. The aluminum electrodes are connected with positive and negative polarizing electrodes, respectively, via the granular carbon, thus lowering the contact resistance.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: September 10, 2002
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Jeol Ltd.
    Inventors: Michio Okamura, Minoru Noguchi, Manabu Iwaida, Eisuke Komazawa, Akinori Mogami
  • Patent number: 6424156
    Abstract: A long-lived, lightweight, and quickly and precisely charged storage capacitor power supply capable of stably supplying electric power to a load. The power supply has a capacitor block consisting of capacitors connected in series, in parallel or in any combination of series and parallel. The power supply further includes a charging circuit for charging the block, a charging power supply connected with the block via the charging circuit, and a charge-limiting circuit. This charge-limiting circuit detects the voltage across the terminals of the block and limits charging of the block if the voltage reaches a given value. One embodiment of the invention further includes a charge-limiting circuit, a full charge-detecting circuit, and a residual electricity-detecting circuit connected in parallel with the block. The charge-limiting circuit senses that the voltage across the terminals of the block exceeds the given value and causes the charging current to bypass the block.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 23, 2002
    Assignee: JEOL Ltd.
    Inventor: Michio Okamura