Patents by Inventor Osamu Hirai

Osamu Hirai 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: 11439721
    Abstract: To provide an aldehyde scavenger and a method for removing aldehydes by using the same, for quickly and continuously capturing aldehydes. An aldehyde scavenger comprising at least one O-substituted hydroxylamine or at least one chemically acceptable salt thereof, is used against an aldehyde generation source.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: September 13, 2022
    Assignees: TOSOH CORPORATION, Sagami Chemical Research Institute
    Inventors: Yukinori Sudo, Takahiro Masuda, Osamu Kobayashi, Takuri Ozaki, Kenji Hirai
  • Patent number: 7273652
    Abstract: Production of hollow carbon fibers and hollow carbon particles includes baking and carbonization of polymer particles having a specified volume after deformation. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber is applicable to electron discharge devices. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, separation and refining using a solvent is not required. A hollow carbon particle of desired shape can be produced at a high yield rate. The hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape are provided so that there is an increase in the amount of electrons discharged from the hollow carbon fiber. Use of this hollow carbon fiber as an electron discharge source provides an excellent electron discharge device characterized by stable pixels.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: September 25, 2007
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Shinji Takeda, Noriyuki Taguchi, Kazumi Kokaji, Osamu Hirai
  • Patent number: 6743500
    Abstract: Production of hollow carbon fibers and hollow carbon particles includes baking and carbonization of polymer particles having a specified volume after deformation. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber is applicable to electron discharge devices. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, separation and refining using a solvent is not required. A hollow carbon particle of desired shape can be produced at a high yield rate. The hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape are provided so that there is an increase in the amount of electrons discharged from the hollow carbon fiber. Use of this hollow carbon fiber as an electron discharge source provides an excellent electron discharge device characterized by stable pixels.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: June 1, 2004
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Shinji Takeda, Noriyuki Taguchi, Kazumi Kokaji, Osamu Hirai
  • Patent number: 6641792
    Abstract: Production of hollow carbon fibers and hollow carbon particles includes baking and carbonization of polymer particles having a specified volume after deformation. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber is applicable to electron discharge devices. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, separation and refining using a solvent is not required. A hollow carbon particle of desired shape can be produced at a high yield rate. The hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape are provided so that there is an increase in the amount of electrons discharged from the hollow carbon fiber. Use of this hollow carbon fiber as an electron discharge source provides an excellent electron discharge device characterized by stable pixels.
    Type: Grant
    Filed: October 15, 2002
    Date of Patent: November 4, 2003
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Shinji Takeda, Noriyuki Taguchi, Kazumi Kokaji, Osamu Hirai
  • Publication number: 20030039830
    Abstract: Production of hollow carbon fibers and hollow carbon particles includes baking and carbonization of polymer particles having a specified volume after deformation. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber is applicable to electron discharge devices. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, separation and refining using a solvent is not required. A hollow carbon particle of desired shape can be produced at a high yield rate. The hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape are provided so that there is an increase in the amount of electrons discharged from the hollow carbon fiber. Use of this hollow carbon fiber as an electron discharge source provides an excellent electron discharge device characterized by stable pixels.
    Type: Application
    Filed: October 15, 2002
    Publication date: February 27, 2003
    Inventors: Shinji Takeda, Noriyuki Taguchi, Kazumi Kokaji, Osamu Hirai
  • Publication number: 20030039829
    Abstract: Production of hollow carbon fibers and hollow carbon particles includes baking and carbonization of polymer particles having a specified volume after deformation. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber is applicable to electron discharge devices. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, separation and refining using a solvent is not required. A hollow carbon particle of desired shape can be produced at a high yield rate. The hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape are provided so that there is an increase in the amount of electrons discharged from the hollow carbon fiber. Use of this hollow carbon fiber as an electron discharge source provides an excellent electron discharge device characterized by stable pixels.
    Type: Application
    Filed: October 15, 2002
    Publication date: February 27, 2003
    Inventors: Shinji Takeda, Noriyuki Taguchi, Kazumi Kokaji, Osamu Hirai
  • Publication number: 20030026980
    Abstract: The present invention provides a hollow carbon fibers, hollow carbon particle and production method thereof comprising a step for baking and carbonization of polymer particles having a specified volume after deformation of them. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber, its production method and electron discharge device. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, a step of separation and refining by solvent or the like is not required. The hollow carbon particle of a desired shape can be produced at a high yield rate. According to the present invention, the hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape (fiber diameter and length) are provided with the result that there is an increase in the amount of electrons discharged from the hollow carbon fiber.
    Type: Application
    Filed: October 29, 2001
    Publication date: February 6, 2003
    Inventors: Shinji Takeda, Noriyuki Taguchi, Kazumi Kokaji, Osamu Hirai
  • Patent number: 5547329
    Abstract: A roller bottle handling system includes a culture rack storage station for storing a plurality of culture racks each for accommodating a plurality of roller bottles each filled with a culture medium and cells, and a mass-handling facility for extracting completed cultures from roller bottles and replacing a culture medium in the roller bottles with a new culture medium. The roller bottle handling system further includes an unloading station for taking out roller bottles from culture racks delivered from the culture rack storage station and delivering the roller bottles to the mass-handling facility, and a loading station for charging roller bottles filled with a culture medium and cells into culture racks. Automatic guided vehicles or overhead traveling cranes are movable to deliver culture racks, one at a time, between the culture rack storage station and the unloading and loading stations.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: August 20, 1996
    Assignee: Kirin Beer Kabushiki Kaisha
    Inventors: Osamu Hirai, Keiji Tamura, Hajime Ichihashi
  • Patent number: 5540857
    Abstract: Liquid crystals purified by treating with porous particles of a compound having one or more imide groups, or a liquid crystal composition comprising one or more liquid crystals and porous particles of a compound having one or more imide groups can provide a liquid crystal cell having a high voltage retention rate and a liquid crystal display device having high display properties.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: July 30, 1996
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Osamu Hirai, Noriji Tashiro, Osamu Watanabe, Hiroshi Nishizawa, Kenji Suzuki
  • Patent number: 5422034
    Abstract: Liquid crystals purified by treating with porous particles of a compound having one or more imide groups, or a liquid crystal composition comprising one or more liquid crystals and porous particles of a compound having one or more imide groups can provide a liquid crystal cell having a high voltage retention rate and a liquid crystal display device having high display properties.
    Type: Grant
    Filed: December 10, 1993
    Date of Patent: June 6, 1995
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Osamu Hirai, Noriji Tashiro, Osamu Watanabe, Hiroshi Nishizawa, Kenji Suzuki
  • Patent number: 4949209
    Abstract: In a thin-film magnetic head having a magnetic core (upper magnetic layer), in the electromagnetic conversion section, which are composed of an upper first magnetic film, inorganic insulating film, and an upper second magnetic film, the upper first magnetic film is used as a second wiring for electrical continuity between the coil and input/output terminal. The upper first magnetic film is connected to the center of a coil which is of a single-layer structure. The first upper magnetic film is made of a same material as the coil and is formed simultaneously with the latter. In the region in which an input/output terminal backing is formed, the upper first magnetic film of a second wiring is removed. Thus, the electrical continuity is established between the input/output terminal and the center of the coil.Also, the utilization of the upper first magnetic film as second wiring is applicable to a thin-film magnetic head having a coil of a multi-layer structure.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: August 14, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Imanaka, Tetsuo Kobayashi, Harunobu Saito, Osamu Hirai, Kanji Kawakami
  • Patent number: 4560703
    Abstract: Novel clavulone derivatives of the formula: ##STR1## wherein R.sup.1 and R.sup.2 combine together to form a keto group or either one of R.sup.1 and R.sup.2 is hydrogen atom and another one of them is hydroxy or acetoxy group, R.sup.3 and R.sup.4 are the same or different and are each hydrogen atom or acetoxy group, n is 0 or 1, provided that when the C--C bond between 8 and 12 positions is double bond, n is 0, a, b, c, d and e are each an integer of 1 or 2, and the dotted line means that the C--C bond is a single bond or double bond, or a salt thereof, which have excellent anti-inflammatory activity and anti-tumor activity and hence are useful as an anti-inflammatory agent or anti-tumor agent.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: December 24, 1985
    Assignee: Fujisawa Pharmaceutical Co., Ltd.
    Inventors: Masanori Fukushima, Osamu Hirai, Toshitaka Manda, Hiroyuki Kikuchi, Yasumasa Tsukitani, Iwao Shimizu, Yasuji Yamada
  • Patent number: 4550353
    Abstract: A thin-film magnetic head having a magnetic core of double step structure and a method of fabricating it. A first magnetic core is formed on a substrate, which has a predetermined thickness at a pole chip region thereof and a thickness larger than the predetermined thickness at a back region thereof; a magnetic gap is formed thereon, a conductor coil is formed on the magnetic gap, which is encircled by an inter-layer, insulating film; a first magnetic film is formed thereon, which constitutes one layer of a second magnetic core and is connected with the first magnetic core at the back region; and a second magnetic film is formed thereon through an inorganic insulating film, which constitutes another layer of the second magnetic core and is removed at the pole chip region. When the second magnetic film is removed, the inorganic insulating film serves to protect the first magnetic film, and hence the thickness of the first magnetic film is maintained unvaried.
    Type: Grant
    Filed: December 7, 1983
    Date of Patent: October 29, 1985
    Assignee: Computer Basic Technology Research
    Inventors: Osamu Hirai, Tetsuo Kobayashi, Shunichiro Kuwatsuka, Saburo Suzuki
  • Patent number: 4505818
    Abstract: A liquid chromatographic column packing material comprising porous styrene-divinylbenzene copolymer particles having --SO.sub.3.sup.- groups and, as counterion thereof, ions represented by the formula: .sup.+ NH.sub.n X.sub.m wherein X is --CH.sub.2 OH, --CH.sub.2 CH.sub.2 O--.sub.p H or --CR'.sub.q (CH.sub.2 OH).sub.r group; R' is hydrogen or a lower alkyl group; q and r are independently zero or an integer of 1 to 3, and q+r=3; p is an integer of 1 to 10; n is zero or an integer of 1; and m is an integer of 3 or 4, but m+n=4, is suited for separating sugars or sugaralcohols by liquid chromatography.
    Type: Grant
    Filed: September 20, 1983
    Date of Patent: March 19, 1985
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yoshiyuki Mukoyama, Osamu Hirai, Tetsuya Aoyama
  • Patent number: 4486308
    Abstract: Porous styrene-divinylbenzene copolymer particles having SO.sub.3.sup.- groups and counter ions for SO.sub.3.sup.- groups, said counter ions being (a) at least one of Ca.sup.++ and Sr.sup.++ and (b) at least one of Pb.sup.++ and Ba.sup.++ and the equivalent ratio of (a)/(b) being 1/2 to 2/1, are an excellent liquid chromatographic column packing material suited for separating sugars different in kind but the same in molecular weight.
    Type: Grant
    Filed: September 19, 1983
    Date of Patent: December 4, 1984
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Osamu Hirai, Tetsuya Aoyama, Yoshiyuki Mukoyama
  • Patent number: 4427822
    Abstract: A particulate polymer which has imide groups and may be in gelled state can be produced by reacting a polyisocyanate with a polycarboxylic acid having at least one acid anhydride group, and if necessary together with a polycarboxylic acid other than that mentioned above in the presence of a liquid medium containing at least one non-aqueous organic liquid, and thereby obtaining the particulate polymer having imide groups dispersed in the non-aqueous organic liquid.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: January 24, 1984
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Hiroshi Nishizawa, Yoshiyuki Mukoyama, Osamu Hirai