Patents by Inventor Ryuichiro Kawai

Ryuichiro Kawai 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: 10610834
    Abstract: An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups. In Formula (b-1), Q1 and Q2 are each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: April 7, 2020
    Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Ryuichiro Kawai, Takashi Yamamoto, Daisuke Ohno, Yohei Abiko, Hiroaki Oka, Shuya Suenaga, Takafumi Takada, Tomohiro Hariu
  • Publication number: 20190381463
    Abstract: An asymmetric membrane including a crosslinked polyimide resin, the crosslinked polyimide resin being formed by crosslinking a polyimide resin by a crosslinking agent; the polyimide resin including a structural unit (A) derived from tetracarboxylic dianhydride and a structural unit (B) derived from diamine; the structural unit (A) including a structural unit (A-1) derived from a compound represented by Formula (a-1); the structural unit (B) including a structural unit (B-1) derived from Formula (b-1), and a proportion of the structural unit (B-1) per 100 mol % of the structural unit (B) being from 0.1 to 50 mol %; and the crosslinking agent being a compound having not less than two functional groups that bond with carboxy groups. In Formula (b-1), Q1 and Q2 are each independently a group including an aromatic group, an aliphatic hydrocarbon group, and/or an alicyclic hydrocarbon group; X is a single bond or a particular group.
    Type: Application
    Filed: January 30, 2019
    Publication date: December 19, 2019
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Ryuichiro KAWAI, Takashi YAMAMOTO, Daisuke OHNO, Yohei ABIKO, Hiroaki OKA, Shuya SUENAGA, Takafumi TAKADA, Tomohiro HARIU
  • Publication number: 20190099738
    Abstract: The present invention provides an oxygen absorber composition containing a hydrocarbon resin; an iron particle having an average particle diameter of 1.0 ?m or more and 200 ?m or less and having a BET specific surface area of 10 m2/g or more; and an aldehyde absorber capable of absorbing at least aldehyde compound, wherein the iron particle contains iron.
    Type: Application
    Filed: January 25, 2017
    Publication date: April 4, 2019
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Ryuichiro KAWAI, Takashi KUBO, Jungo TAGUCHI, Daiki SATO, Kenichi NIIMI, Akihiro MASUDA
  • Publication number: 20160250617
    Abstract: The method for storing an oxygen absorbing agent according to the present invention comprises: providing an oxygen absorbing agent comprising a metal, the metal having been obtained by subjecting an alloy comprising (A) at least one transition metal selected from the group consisting of iron, cobalt, nickel and copper and (B) aluminum to treatment with a basic aqueous solution to elute and remove at least a part of the aluminum (B), the oxygen absorbing agent having a specific surface area of at least 10 m2/g as measured by a BET method; and immersing the oxygen absorbing agent in an aqueous solution containing a chelating agent to store the oxygen absorbing agent.
    Type: Application
    Filed: October 22, 2014
    Publication date: September 1, 2016
    Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.
    Inventors: Ryuichiro KAWAI, Hirokazu TANAKA
  • Patent number: 8433836
    Abstract: Disclosed herein is a communication centralized control system including one master device; a communication bus; and a plurality of slave devices configured to be connected to the master device by the communication bus, wherein the master device and the plurality of slave devices are capable of bidirectional communication via the communication bus, and different channels are allocated to at least polling communication from the master device to the slave devices and interrupt communication from the slave devices to the master device, and communication is carried out with multiplexing on the same line.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: April 30, 2013
    Assignee: Sony Corporation
    Inventors: Isao Matsumoto, Hidekazu Kikuchi, Ryuichiro Kawai
  • Publication number: 20110093635
    Abstract: Disclosed herein is a communication centralized control system including one master device; a communication bus; and a plurality of slave devices configured to be connected to the master device by the communication bus, wherein the master device and the plurality of slave devices are capable of bidirectional communication via the communication bus, and different channels are allocated to at least polling communication from the master device to the slave devices and interrupt communication from the slave devices to the master device, and communication is carried out with multiplexing on the same line.
    Type: Application
    Filed: August 24, 2010
    Publication date: April 21, 2011
    Applicant: Sony Corporation
    Inventors: Isao Matsumoto, Hidekazu Kikuchi, Ryuichiro Kawai
  • Patent number: 5432477
    Abstract: There is provided a gain control Gilbert amplifier circuit which can be more easily controlled for variation in the gain characteristics of each predriver integrated circuit for primary color image signals R, G, and B, and the variation caused by light emitting efficiency than the prior art. The gain control Gilbert amplifier circuit also operates in a wider frequency range than the conventional circuits, and has a large S/N ratio. One embodiment of the amplifier circuit comprises a grounded-base transistor amplifier circuit having rectifier elements, reference voltage sources, diodes connected to a differentially paired transistors. The rectifier elements are controlled so that a ratio of currents output from constant-current sources can be selected to enable the frequency characteristic of the amplifier circuit to expand by a frequency range.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: July 11, 1995
    Assignee: Sony Corporation
    Inventors: Seiichi Nishiyama, Masato Kawata, Kiyoshi Furuya, Ryuichiro Kawai
  • Patent number: 4751577
    Abstract: A gain control circuit includes first and second clamping circuits each of which has a DC shift circuit and a comparator comprising the output of the DC shift circuit with a reference voltage and providing a feedback signal to the respective shift circuit. A peak detector is responsive to the output of the second clamping circuit and is connected with a comparator which outputs a gain control signal to a variable gain device or amplifier located between the clamp circuits and also to the comparators associated with the DC shift circuits for varying the follow-up speeds of the clamping circuits.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: June 14, 1988
    Assignee: Sony Corporation
    Inventor: Ryuichiro Kawai