Patents by Inventor Hideki Kurokawa

Hideki Kurokawa 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: 20240101391
    Abstract: A system for detecting a presence of a person in a hoistway, having: one or more controllers configured to authenticate the person in the hoistway; the one or more controllers being operationally connected to an elevator car in the hoistway and configured to determine whether the person is within a predetermined distance of the elevator car from a signal emitter on the person; wherein when the person is within the predetermined distance of the elevator car, the one or more controllers is configured to transmit a feedback request to the person and stop the elevator car unless the one or more controllers receives feedback to the feedback request within a predetermined period of time.
    Type: Application
    Filed: September 26, 2022
    Publication date: March 28, 2024
    Inventors: Jayapal Reddy Gireddy, Helge Krambeck, Xinjin Zheng, Yuzhen Xue, Koji Kiyomoto, Arnaud Blanchard, Daigoro Kurokawa, Kazuya Yamamura, Hideki Arai, Terumitsu Saito, Hideaki Sasaki, Takashi Tanaka, Naoto Furuichi
  • Publication number: 20200002249
    Abstract: A method for producing an unsaturated hydrocarbon, comprising: a step of contacting a raw material gas containing an alkane with a dehydrogenation catalyst to obtain a product gas containing at least one unsaturated hydrocarbon selected from a group consisting of olefins and conjugated dienes, wherein the dehydrogenation catalyst contains at least one additive element selected from the group consisting of Na, K, and Ca, Al, Mg, a group 14 metal element, and Pt, and a content of the additive element is 0.05% by mass or more and 0.70% by mass or less based on a total mass of the dehydrogenation catalyst.
    Type: Application
    Filed: December 27, 2017
    Publication date: January 2, 2020
    Applicants: JXTG Nippon Oil & Energy Corporation, National University Corporation Saitama University
    Inventors: Hideki KUROKAWA, Tatsuya ICHIJO, Nobuhiro KIMURA
  • Patent number: 10494318
    Abstract: A method for producing a conjugated diene according to one aspect of the present invention comprises a step of contacting a raw material gas containing an alkane with a first catalyst and a second catalyst in this order to obtain a product gas containing a conjugated diene. In the production method, the first catalyst contains Sn and Pt, and a content of Sn in the first catalyst is less than 12% by mass based on the total mass of the first catalyst; and the second catalyst contains Sn and Pt, and a content of Sn in the second catalyst is 12% by mass or more based on the total mass of the second catalyst.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: December 3, 2019
    Assignees: JXTG NIPPON OIL & ENERGY CORPORATION, NATIONAL UNIVERSITY CORPORATION SAITAMA UNIVERSITY
    Inventors: Hideki Kurokawa, Tatsuya Ichijo, Nobuhiro Kimura
  • Patent number: 10280126
    Abstract: A method for producing a conjugated diene according to one aspect of the present invention comprises a step of contacting a raw material gas containing an olefin with a dehydrogenation catalyst to obtain a product gas containing a conjugated diene. In the production method, the dehydrogenation catalyst contains Al, a group 14 metal element, and Pt, and a content of the group 14 metal element in terms of oxide in the dehydrogenation catalyst is 9% by mass or more and 50% by mass or less based on the total mass of the dehydrogenation catalyst.
    Type: Grant
    Filed: March 18, 2016
    Date of Patent: May 7, 2019
    Assignees: JXTG NIPPON OIL & ENERGY CORPORATION, NATIONAL UNIVERSITY CORPORATION SAITAMA UNIVERSITY
    Inventors: Hideki Kurokawa, Tatsuya Ichijo, Nobuhiro Kimura
  • Publication number: 20180339953
    Abstract: A method for producing a conjugated diene according to one aspect of the present invention comprises a step of contacting a raw material gas containing an alkane with a first catalyst and a second catalyst in this order to obtain a product gas containing a conjugated diene. In the production method, the first catalyst contains Sn and Pt, and a content of Sn in the first catalyst is less than 12% by mass based on the total mass of the first catalyst; and the second catalyst contains Sn and Pt, and a content of Sn in the second catalyst is 12% by mass or more based on the total mass of the second catalyst.
    Type: Application
    Filed: March 18, 2016
    Publication date: November 29, 2018
    Applicants: JXTG NIPPON OIL & ENERGY CORPORATION, NATIONAL UNIVERSITY CORPORATION SAITAMA UNIVERSITY
    Inventors: Hideki KUROKAWA, Tatsuya ICHIJO, Nobuhiro KIMURA
  • Publication number: 20180065901
    Abstract: A method for producing a conjugated diene according to one aspect of the present invention comprises a step of contacting a raw material gas containing an olefin with a dehydrogenation catalyst to obtain a product gas containing a conjugated diene. In the production method, the dehydrogenation catalyst contains Al, a group 14 metal element, and Pt, and a content of the group 14 metal element in terms of oxide in the dehydrogenation catalyst is 9% by mass or more and 50% by mass or less based on the total mass of the dehydrogenation catalyst.
    Type: Application
    Filed: March 18, 2016
    Publication date: March 8, 2018
    Applicants: JXTG NIPPON OIL & ENERGY CORPORATION, NATIONAL UNIVERSITY CORPORATION SAITAMA UNIVERSITY
    Inventors: Hideki KUROKAWA, Tatsuya ICHIJO, Nobuhiro KIMURA
  • Patent number: 8718027
    Abstract: In a first control mode employed when a wired communication line is used as the backhaul, a wireless access point operates as follows. (1) The access point processes its own control packets for management by itself. (2) The access point communicates packets in which an information item for processing in a controller or a control server is added to user traffic from a client connected to the access point. (3) The access point conducts proxy processing for a control packet for management of a second wireless access point connected to the wireless communication side of the access point. (4) The access point compresses a control packet for management sent from a system controller to the second wireless access point to thereby achieve a frame conversion and then sends the packet to the wireless communication side. This resultantly reduces the traffic on the backhaul wireless communication line.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: May 6, 2014
    Assignee: NEC Corporation
    Inventor: Hideki Kurokawa
  • Patent number: 8681735
    Abstract: A controller manages a connection of a wireless terminal to a wireless base station, and provides a source base station with information for connecting the wireless terminal by way of an anchor when the wireless terminal moves between wireless base stations. When devices on both sides of an anchor connected communication are wireless terminals connected to wireless base stations in said same wireless communications system, a wireless base station device switches a path such that data is transmitted/received between the wireless base stations to which the wireless terminals are connected on both sides of the anchor connected communication without intervention of the anchor.
    Type: Grant
    Filed: March 5, 2007
    Date of Patent: March 25, 2014
    Assignee: NEC Corporation
    Inventors: Yasuhiro Mizukoshi, Sadao Kimura, Hideki Kurokawa
  • Patent number: 8625482
    Abstract: The traffic of wireless communication between wireless access points can be lowered without requiring a change in the access point to which an associated station belongs, to thereby efficiently use a band for the wireless communication. For this purpose, (1) a station sends a packet, and a wireless access point and a wired access point receives the packet; (2) the wired access point stores an identifier indicating proxy transmission in an ACK packet and then transmits the ACK packet, and (3) the wireless access point confirms the proxy processing identifier of the ACK packet from wired access point and stops delivery of packets to the backhaul. The wired access point delivers the packet to a destination of the packet.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: January 7, 2014
    Assignee: NEC Infrontia Corporation
    Inventor: Hideki Kurokawa
  • Patent number: 8455135
    Abstract: A battery packet (50) comprises a battery case (51) formed by processing a battery case forming laminated sheet (10), a battery 50a contained in the battery case (51), and tabs (59, 60) extending outside from the battery case (51). The battery case forming laminated sheet (10) is formed by laminating a first base film layer (1a), i.e., an outermost layer, a metal foil layer (2), and a heat-adhesive resin layer (3) in that order. The first base film layer (1a) is a biaxially oriented polyethylene terephthalate resin film or a biaxially oriented nylon resin film. The metal foil layer (2) is an aluminum or copper foil. The heat-adhesive resin layer (3) is formed of a polyolefin resin, more preferably, of an acid-denatured polyolefin resin.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: June 4, 2013
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takuya Yamazaki, Kiyoshi Oguchi, Koji Shimizu, Kenichiro Suto, Tsutomu Yoshinaka, Hideki Kurokawa, Hitoshi Sekino, Masahiro Yoshikawa, Hiroshi Miyama, Katsuhiko Hayashi, Jun Fukuda
  • Patent number: 8323828
    Abstract: A battery packet (50) comprises a battery case (51) formed by processing a battery case forming laminated sheet (10), a battery 50a contained in the battery case (51), and tabs (59, 60) extending outside from the battery case (51). The battery case forming laminated sheet (10) is formed by laminating a first base film layer (1a), i.e., an outermost layer, a metal foil layer (2), and a heat-adhesive resin layer (3) in that order. The first base film layer (1a) is a biaxially oriented polyethylene terephthalate resin film or a biaxially oriented nylon resin film. The metal foil layer (2) is an aluminum or copper foil. The heat-adhesive resin layer (3) is formed of a polyolefin resin, more preferably, of an acid-denatured polyolefin resin.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: December 4, 2012
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Takuya Yamazaki, Kiyoshi Oguchi, Koji Shimizu, Kenichiro Suto, Tsutomu Yoshinaka, Hideki Kurokawa, Hitoshi Sekino, Masahiro Yoshikawa, Hiroshi Miyama, Katsuhiko Hayashi, Jun Fukuda
  • Publication number: 20120244421
    Abstract: A battery packet (50) comprises a battery case (51) formed by processing a battery case forming laminated sheet (10), a battery 50a contained in the battery case (51), and tabs (59, 60) extending outside from the battery case (51). The battery case forming laminated sheet (10) is formed by laminating a first base film layer (1a), i.e., an outermost layer, a metal foil layer (2), and a heat-adhesive resin layer (3) in that order. The first base film layer (1a) is a biaxially oriented polyethylene terephthalate resin film or a biaxially oriented nylon resin film. The metal foil layer (2) is an aluminum or copper foil. The heat-adhesive resin layer (3) is formed of a polyolefin resin, more preferably, of an acid-denatured polyolefin resin.
    Type: Application
    Filed: March 6, 2012
    Publication date: September 27, 2012
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Takuya YAMAZAKI, Kiyoshi OGUCHI, Koji SHIMIZU, Kenichiro SUTO, Tsutomu YOSHINAKA, Hideki KUROKAWA, Hitoshi SEKINO, Masahiro YOSHIKAWA, Hiroshi MIYAMA, Katsuhiko HAYASHI, Jun FUKUDA
  • Patent number: 8189545
    Abstract: There is provided a wireless LAN access point capable of confirming and changing the setting using the IP communication for a target wireless LAN access point positively even when the IP address of the wireless LAN access point is forgotten. The wireless LAN access point, upon receipt of a probe request, transmits a probe response while at the same time starting to transmit a beacon frame required to be periodically transmitted. The wireless LAN access point starts the DHCP server therein at the same time that the process of associating the wireless LAN station is started. The DHCP server operates only for the wireless interface of the wireless LAN access point and the wireless LAN station associated by use of the maintenance SSID. The wireless LAN access point, upon complete association of the wireless LAN station with the local access point, leases the IP address to the wireless LAN station from the DHCP server in the particular local access point.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: May 29, 2012
    Assignee: NEC Infrontia Corporation
    Inventors: Takeshi Irie, Hideki Kurokawa
  • Patent number: 8145220
    Abstract: In making a switching by hand-over, it takes a shorter time to redecide a radio base station of destination candidate to be connected that is capable of securing a required radio band, even in case the radio base station of destination to be switched to refuses the connection to a radio communication terminal. Therefore, the radio base station is configured to acquire the service band information of another radio base station, and notify the radio communication terminal of the radio base station information of a destination candidate to be connected to, based on the acquired service band information, in case of refusing a connection switching request from the radio communication terminal performing the hand-over.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: March 27, 2012
    Assignee: NEC Infrontia Corporation
    Inventor: Hideki Kurokawa
  • Patent number: 7881718
    Abstract: When a station is connected via a connector to an AC adapter, a controller may detect the event of connection between the station and the adapter and drive a suppression signal transmitter to send a suppression signal to suppress a handover by the station. The station may include a communication controller to fix, upon receipt of the suppression signal from the adapter, a wireless access point to which the station belongs. The station may enter a handover suppressed state in which the station does not conduct a handover to belong to another wireless access point so long as the station is connected to the adapter and is receiving the suppression signal. This may suppress the excessive handover and secure stable communication quality.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: February 1, 2011
    Assignee: NEC Infrontia Corporation
    Inventors: Hideki Kurokawa, Kenichi Yasuma, Hatsuho Murata
  • Patent number: 7869829
    Abstract: The present invention increases, even while transmission rights are not being allocated to respective radio communication terminals, a maximum number of simultaneous connections within a communication capacity range of a communication frequency set in advance, reduce a waiting time, and increase speed of communication without causing an increase in cost for addition of radio base stations, replacement with a high-performance model, and the like. A radio base station 2a calculates a guard time based on beacon transmission timing from a difference between reference times in beacon transmission, and transmission and reception time frame information based on beacon transmission timing of a radio base station 2b.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: January 11, 2011
    Assignee: NEC Infrontia Corporation
    Inventor: Hideki Kurokawa
  • Patent number: 7532914
    Abstract: A radio base station 1 is connected together with a multi-media server 3 and a multi-media terminal unit 4 to a LAN or WAN line 100 for radio communication with radio mobile terminals 2-1 to 2-N. The radio mobile terminals 2-1 to 2-N can be switched between a power-saving mode of their part-time duty service and a normal mode of their full-time duty service. The radio base station 1 manages the radio mobile terminals 2-1 to 2-N by executing discrimination as to whether they are in the power-saving mode of the part-time duty service operation or in the normal mode of the full-time duty service operation. and when the radio mobile terminals 2-1 to 2-N are in the power-saving mode of the part-time duty service operation, it acts as an agent to execute part of the processes to be executed in the radio mobile terminals 2-1 to 2-N.
    Type: Grant
    Filed: April 1, 2004
    Date of Patent: May 12, 2009
    Assignee: NEC Corporation
    Inventor: Hideki Kurokawa
  • Patent number: 7457612
    Abstract: There is provided a wireless communication system including a radio-signal base station, and a mobile wireless terminal operating in a power-saving mode in which the mobile wireless terminal intermittently receives packet signals, and in a normal mode in which the mobile wireless terminal regularly receives packet signals. When the radio-signal base station receives packet signals addressed to a mobile wireless terminal being in the power-saving mode, the radio-signal base station temporarily stores the received packet signals. The mobile wireless terminal requests the radio-signal base station to transmit the packet signals thereto, receives a part of the packet signal from the radio-signal base station, and, if the mobile wireless terminal judges that it would be necessary to carry out real-time communication for receiving entirety of the packet signals, the mobile wireless terminal transfers to the normal mode from the power-saving mode for receiving entirety of the packet signals.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: November 25, 2008
    Assignee: Nec Corporation
    Inventors: Hideki Kurokawa, Takahiro Kakumaru, Shinichi Morimoto
  • Publication number: 20080212508
    Abstract: A power saving method in a wireless LAN system is disclosed for permitting a terminal station to promptly transition to a doze state irrespective of the presence or absence of data destined to the terminal station in a base station. Upon receipt of a PS-Poll signal from a terminal station subordinate to a base station for prompting a transmission of data destined to the terminal station, the base station transmits an ACK signal to the terminal station for indicating a successful reception of the PS-Poll signal. Further, the base station transmits a data frame including data destined to the terminal station when there is such data, or transmits an empty data frame when there is no data destined to the terminal station. Then, upon receipt of the data frame (including the empty data frame), the terminal station transmits an ACK signal to the base station, and then transitions to the doze state in which a transmission/reception function is made inoperative.
    Type: Application
    Filed: April 25, 2008
    Publication date: September 4, 2008
    Applicant: NEC CORPORATION
    Inventors: Shinichi MORIMOTO, Hideki Kurokawa, Youko Omori
  • Patent number: 7391746
    Abstract: A power saving method in a wireless LAN system is disclosed for permitting a terminal station to promptly transition to a doze state irrespective of the presence or absence of data destined to the terminal station in a base station. Upon receipt of a PS-Poll signal from a terminal station subordinate to a base station for prompting a transmission of data destined to the terminal station, the base station transmits an ACK signal to the terminal station for indicating a successful reception of the PS-Poll signal. Further, the base station transmits a data frame including data destined to the terminal station when there is such data, or transmits an empty data frame when there is no data destined to the terminal station. Then, upon receipt of the data frame (including the empty data frame), the terminal station transmits an ACK signal to the base station, and then transitions to the doze state in which a transmission/reception function is made inoperative.
    Type: Grant
    Filed: June 27, 2005
    Date of Patent: June 24, 2008
    Assignee: NEC Corporation
    Inventors: Shinichi Morimoto, Hideki Kurokawa, Youko Omori