Patents by Inventor Yoshio Okamoto

Yoshio Okamoto 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: 20220220226
    Abstract: Provided are a novel chitosan compound represented by Formula (I) and a separating agent for optical isomers. In Formula (I), each R is independently a group represented by Formula (II) or a group represented by Formula (III); Ra is an alkyl group having from 1 to 5 carbons or an alkyl group having from 3 to 5 carbons and having a branched chain; and n is an integer of 5 or greater; and in Formulas (II) and (III), each Rb is independently an unsubstituted phenyl group, a phenyl group having a substituent, an unsubstituted cylohexyl group, or a cyclohexyl group having a substituent, and each of the substituent is independently an alkyl group having from 1 to 5 carbons, or a halogen.
    Type: Application
    Filed: May 27, 2020
    Publication date: July 14, 2022
    Applicant: DAICEL CORPORATION
    Inventors: Lili Zhang, Hongzhong Deng, Xuepeng Wu, Jun Shen, Yoshio Okamoto
  • Publication number: 20210261730
    Abstract: Provided is a polycarbonate-based resin composition, including: a polycarbonate-based resin (5) containing 1 mass % or more to 100 mass % or less of a polycarbonate-polyorganosiloxane copolymer (A), which contains a polycarbonate block (A-1) formed of a specific repeating unit and a polyorganosiloxane block (A-2) containing a specific repeating unit; and 0.05 part by mass or more to 0.5 part by mass or less of a release agent (B) with respect to 100 parts by mass of the polycarbonate-based resin (S), wherein the copolymer (A) contains a polycarbonate-polyorganosiloxane copolymer (Ax) in which the polyorganosiloxane block (A-2) has an average chain length of from 20 to 65, and a polycarbonate-polyorganosiloxane copolymer (Ay) in which the polyorganosiloxane block (A-2) has an average chain length longer than the average chain length of the copolymer (Ax) by 10 or more.
    Type: Application
    Filed: July 2, 2019
    Publication date: August 26, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yoshio OKAMOTO, Yasuhiro MOGI
  • Patent number: 11021604
    Abstract: Provided is a polycarbonate resin composition, including: a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure; a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; and a copolymer (C) having constituent units derived from butadiene and methyl methacrylate, in which: a content of the polyorganosiloxane block moiety in the entire resin composition is from 0.1 mass % to 10 mass %; a total of a content of the constituent unit derived from the acrylonitrile in the entire resin composition and a content of the constituent unit derived from the styrene in the entire resin composition is from 8 mass % to 45 mass %; a content of the constituent unit derived from the butadiene in the entire resin composition is from 3 mass % to 10 mass %; and the (A) has a viscosity-average molecular weight (Mv) of from 20,000 to 25,000.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: June 1, 2021
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshio Okamoto, Tsuyoshi Murakami
  • Patent number: 10836834
    Abstract: Provided is a complex obtained by reacting a polymer compound derivative obtained by modifying part of the hydroxy groups or amino groups of a polymer compound having the hydroxy groups or amino groups with a compound represented by the following general formula (I) with one or more kinds of compounds represented by the following general formulae (II) to (V): (I) A-X—Si(Y)nR3-n; (II) M(OR1)nR24-n; (III) Al(OR1)pR23-p; (IV) Mg(OR1)qR22-q; and (V) [Si(OR3)nR43-n]—(X)—[Si(OR5)nR63-n].
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: November 17, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Yoshio Okamoto, Chiyo Yamamoto, Tomoyuki Ikai, Masami Kamigaito
  • Patent number: 10686292
    Abstract: A laser module has a base portion having a metal holding portion; a laser light source fixed to the base portion; an optical outputting portion deriving the laser light from a collimating optical system out of the base portion. The collimating optical system includes an input lens receiving the laser light from the laser light source; and an output lens receiving the laser light from the input lens and outputting the laser light to the optical outputting portion, each located in order from the laser light source. The input lens is a convex lens fixed in a first cylinder body made of metal and welded to the holding portion. The output lens is a convex lens having a focal point length longer than that of the input lens and held by the holding member glued to the base portion.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: June 16, 2020
    Assignee: STANLEY ELECTRIC CO., LTD.
    Inventors: Daisuke Nagatomo, Yoshio Okamoto, Takashi Nakai, Kenji Nagashima
  • Patent number: 10634105
    Abstract: One passage for swirling is formed in an orifice plate fixed on a nozzle body. Two swirl chambers in which fuel is caused to swirl so that the fuel has swirling force are provided at an end of the one passage for swirling on the downstream side of the flow direction of fuel. Therefore, the collision between the swirling flow in the swirl chamber and the fuel flowing in the passage for swirling is mitigated, and the swirling flow can be smoothly produced to promote pulverization of sprays injected from fuel injection ports.
    Type: Grant
    Filed: June 22, 2016
    Date of Patent: April 28, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshio Okamoto, Yoshihito Yasukawa, Noriyuki Maekawa, Nobuaki Kobayashi, Takahiro Saito
  • Patent number: 10466490
    Abstract: A video projection device 001 includes a video generation section 041 that has a micro display element 003 which generates video and an illuminating optical system 002 which illuminates a micro display element; projection section 043 that project the video which is generated by the video generation section onto the eyes of a user through an eyepiece section; and a mechanical support section 042 that connects the video generation section to the projection section using a housing section. The mechanical support section includes at least one transparent area 011 that is surrounded by the housing section, and penetrates in a direction parallel to a direction in which the video from the projection section is projected. The illuminating optical system includes a light source that emits light in a plurality of wavelength bands, and a controller 440 that controls the output of the light source.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: November 5, 2019
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Tomoto Kawamura, Toshiteru Nakamura, Yoshiho Seo, Satoshi Ouchi, Hidenao Saito, Yoshio Okamoto, Kenji Kiya
  • Publication number: 20190326725
    Abstract: A laser module has a base portion having a metal holding portion; a laser light source fixed to the base portion; an optical outputting portion deriving the laser light from a collimating optical system out of the base portion. The collimating optical system includes an input lens receiving the laser light from the laser light source; and an output lens receiving the laser light from the input lens and outputting the laser light to the optical outputting portion, each located in order from the laser light source. The input lens is a convex lens fixed in a first cylinder body made of metal and welded to the holding portion. The output lens is a convex lens having a focal point length longer than that of the input lens and held by the holding member glued to the base portion.
    Type: Application
    Filed: April 18, 2019
    Publication date: October 24, 2019
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventors: Daisuke NAGATOMO, Yoshio OKAMOTO, Takashi NAKAI, Kenji NAGASHIMA
  • Patent number: 10119022
    Abstract: Provided is a polycarbonate resin composition, including: a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure; a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; a copolymer (C) having constituent units derived from butadiene and methyl methacrylate; and a flame retardant (D), the resin composition satisfying a predetermined expression (a).
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: November 6, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshio Okamoto, Tsuyoshi Murakami
  • Patent number: 10066101
    Abstract: Provided is a polycarbonate resin molding material for articles to be coated, containing a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure, and a copolymer (B) having a constituent unit derived from butadiene, and a content of the polyorganosiloxane block moiety in entirety of the molding material is in the range of 0.50 to 10% by mass and a content of the constituent unit derived from butadiene in entirety of the molding material is in the range of 1 to 10% by mass.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: September 4, 2018
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yusuke Aoki, Yoshio Okamoto, Tsuyoshi Murakami
  • Publication number: 20180230305
    Abstract: Provided is a polycarbonate resin composition, including: a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure; a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; and a copolymer (C) having constituent units derived from butadiene and methyl methacrylate, in which: a content of the polyorganosiloxane block moiety in the entire resin composition is from 0.1 mass % to 10 mass %; a total of a content of the constituent unit derived from the acrylonitrile in the entire resin composition and a content of the constituent unit derived from the styrene in the entire resin composition is from 8 mass % to 45 mass %; a content of the constituent unit derived from the butadiene in the entire resin composition is from 3 mass % to 10 mass %; and the (A) has a viscosity-average molecular weight (Mv) of from 20,000 to 25,000.
    Type: Application
    Filed: August 2, 2016
    Publication date: August 16, 2018
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshio OKAMOTO, Tsuyoshi MURAKAMI
  • Publication number: 20180148392
    Abstract: Provided is a separating agent for optical isomers, which is configured of a novel xylan derivative and a carrier. Specifically provided is a separating agent for optical isomers, which is configured of a carrier and a xylan-phenylcarbamate derivative that is obtained by substituting a hydroxy group of xylan with a group represented by formula (I) or (II). (In formula (I), R1 represents a halogen or an alkyl group having 1-5 carbon atoms; and the position of substitution of the R1 moiety is the meta position or the para position. In formula (II), each of R2 and R3 independently represents a halogen or an alkyl group having 1-5 carbon atoms, and R2 and R3 are groups different from each other.
    Type: Application
    Filed: May 16, 2016
    Publication date: May 31, 2018
    Applicant: DAICEL CORPORATION
    Inventors: Jun SHEN, Qiang LI, Geng LI, Yoshio OKAMOTO
  • Patent number: 9927613
    Abstract: An image display apparatus which displays, as a virtual image, image in a visual field of a user, including an image generation section to generate image; an illumination section to illuminate light to the image generation section; and a projection section by which the image generated by the image generation section is projected, as a virtual image, into the visual field of the user, the projection section includes: a prism lens formed by integrating, by predetermined unit, a lens to generate the virtual image, with a prism provided thereon with a half mirror film which bends, in the direction of the pupil, a signal light from the image generation section; and aperture restriction unit which is provided on the incident surface of the prism lens, and which allows light in a predetermined area of the signal light from the image generation section to pass therethrough.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: March 27, 2018
    Assignee: Hitachi-LG Data Storage, Inc.
    Inventors: Toshiteru Nakamura, Satoshi Ouchi, Yoshiho Seo, Tomoto Kawamura, Yoshio Okamoto
  • Publication number: 20180056270
    Abstract: Provided are a novel amylose derivative which exhibits excellent optical isomer separability and which is suitable as an optical isomer separating agent; and an optical isomer separating agent containing the amylose derivative. A task is attained by an amylose derivative having a constituent unit represented by formula (I) below; In below formula (I), R1 is a substituent group represented by any of formulae 1 to 3 below, and R2 is a substituent group represented by any of formulae a to g below. R1 and R2 are different substituent groups. A combination of R1 and R2 in which R1 is a substituent group represented by structural formula 3 and R2 is a substituent group represented by structural formula c is excluded from the formula (I).
    Type: Application
    Filed: March 29, 2017
    Publication date: March 1, 2018
    Applicant: DAICEL CORPORATION
    Inventors: Jun SHEN, Zhongzheng YANG, Geng LI, Yoshio OKAMOTO
  • Patent number: 9901902
    Abstract: Provided are a novel amylose derivative which exhibits excellent optical isomer separability and which is suitable as an optical isomer separating agent; and an optical isomer separating agent containing the amylose derivative. A task is attained by an amylose derivative having a constituent unit represented by formula (I) below; In below formula (I), R1 is a substituent group represented by any of formulae 1 to 3 below, and R2 is a substituent group represented by any of formulae a to g below. R1 and R2 are different substituent groups. A combination of R1 and R2 in which R1 is a substituent group represented by structural formula 3 and R2 is a substituent group represented by structural formula c is excluded from the formula (I).
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: February 27, 2018
    Assignee: DAICEL CORPORATION
    Inventors: Jun Shen, Zhongzheng Yang, Geng Li, Yoshio Okamoto
  • Publication number: 20170145211
    Abstract: Provided is a polycarbonate resin molding material for articles to be coated, containing a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure, and a copolymer (B) having a constituent unit derived from butadiene, and a content of the polyorganosiloxane block moiety in entirety of the molding material is in the range of 0.50 to 10% by mass and a content of the constituent unit derived from butadiene in entirety of the molding material is in the range of 1 to 10% by mass.
    Type: Application
    Filed: March 11, 2015
    Publication date: May 25, 2017
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yusuke AOKI, Yoshio OKAMOTO, Tsuyoshi MURAKAMI
  • Patent number: 9593202
    Abstract: Provided is a polycarbonate resin composition pellet, which has a light transmittance at a wavelength of 380 nm of 97.0% or more when the light transmittance is measured by using a methylene chloride solution having a concentration of 12 g/dL, the solution being charged into a quartz glass cell having an optical path length of 5 cm, and which has a viscosity-average molecular weight (Mv) of from 11,000 to 22,000.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: March 14, 2017
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshio Okamoto, Takayoshi Tanaka, Masami Takimoto, Yasunobu Yamazaki
  • Publication number: 20170044363
    Abstract: Provided is a polycarbonate resin composition, including: a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure; a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; a copolymer (C) having constituent units derived from butadiene and methyl methacrylate; and a flame retardant (D), the resin composition satisfying a predetermined expression (a).
    Type: Application
    Filed: February 13, 2015
    Publication date: February 16, 2017
    Inventors: Yoshio OKAMOTO, Tsuyoshi MURAKAMI
  • Patent number: 9541048
    Abstract: A fuel injection valve realizing improved circumferential uniformity of swirling fuel is provided. The fuel injection valve includes a swirling chamber having an inner peripheral wall whose curvature is gradually larger from upstream to downstream, a path for swirling which, having a fuel flow-in region formed along a valve axis direction, guides fuel to the swirling chamber, and a fuel injection orifice open into the swirling chamber. In the fuel injection valve, the path for swirling is inclined toward the fuel injection orifice formed on a downstream side of the swirling chamber.
    Type: Grant
    Filed: March 6, 2014
    Date of Patent: January 10, 2017
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshio Okamoto, Kazuki Yoshimura, Noriyuki Maekawa, Nobuaki Kobayashi, Eiji Ishii, Takahiro Saito
  • Publication number: 20160355678
    Abstract: Provided is a polycarbonate resin composition, including: a polycarbonate resin (A) containing a polycarbonate-polyorganosiloxane copolymer (A-1) having a specific structure; a copolymer (B) having constituent units derived from acrylonitrile and styrene, and being free of a constituent unit derived from methyl methacrylate; and a copolymer (C) having constituent units derived from butadiene and methyl methacrylate, in which a content of the polyorganosiloxane block moiety in the entire resin composition is from 0.50 mass % to 10 mass %, and a content of the constituent unit derived from butadiene in the entire resin composition is from 3 mass % to 10 mass %.
    Type: Application
    Filed: February 13, 2015
    Publication date: December 8, 2016
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Tsuyoshi MURAKAMI, Yoshio OKAMOTO