Patents by Inventor Takashi Yasuhara

Takashi Yasuhara 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: 4942205
    Abstract: An .alpha.-fluoroacrylic acid polymer and a pervaporation membrane made of the polymer, the polymer comprising:(1) about 5 to about 100% by weight of a structural unit represented by the formula ##STR1## wherein X.sup.1 is (i) carboxyl group optionally converted to alkali metal salt, calcium salt, magnesium salt, zinc salt, iron salt, nickel salt, mercury salt, copper salt, cadmium salt, ammonium salt or C.sub.1 -C.sub.20 alkyl group-containing primary or tertiary amine salt, or (ii) a group --CONR.sup.4 R.sup.5 (wherein R.sup.4 is hydrogen or C.sub.1 -C.sub.20 alkyl group and R.sup.5 is hydrogen, C.sub.1 -C.sub.20 hydroxyalkyl group, C.sub.1 -C.sub.20 alkyl group containing sulfone group or carboxyl group both optionally converted to alkali metal salt, or a group --R.sup.7 NHR.sup.8.HY.sup.2 [wherein R.sup.7 is C.sub.1 -C.sub.5 alkylene group, R.sup.8 is C.sub.1 -C.sub.20 alkyl group optionally containing hydroxyl group and Y.sup.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: July 17, 1990
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Takashi Yasuhara
  • Patent number: 4871820
    Abstract: An .alpha.-fluoroacrylic acid polymer and a pervaporation membrane made of the polymer, the polymer comprising:(1) about 5 to about 100% by weight of a structural unit represented by the formula ##STR1## wherein X.sup.1 is (i) carboxyl group optionally converted to alkali metal salt, calcium salt, magnesium salt, zinc salt, iron salt, nickel salt, mercury salt, copper salt, cadmium salt, ammonium salt or C.sub.1 -C.sub.20 alkyl group-containing primary or tertiary amine salt, or (ii) a group --CONR.sup.4 R.sup.5 (wherein R.sup.4 is hydrogen or C.sub.1 -C.sub.20 alkyl group and R.sup.5 is hydrogen, C.sub.1 -C.sub.20 hydroxyalkyl group, C.sub.1 -C.sub.20 alkyl group containing sulfone group or carboxyl group both optionally converted to alkali metal salt, or a group --R.sup.7 NHR.sup.8 .multidot.HY.sup.2 [wherein R.sup.7 is C.sub.1 -C.sub.5 alkylene group, R.sup.8 is C.sub.1 -C.sub.20 alkyl group optionally containing hydroxyl group and Y.sup.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: October 3, 1989
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Takashi Yasuhara
  • Patent number: 4832712
    Abstract: Disclosed are a gas separating membrane prepared from a polymer from a monomer represented by the formula (1): ##STR1## wherein X is chlorine atom or fluorine atom, Y is hydrogen atom or methyl group, and m is 0 or an integer of 1 to 5, and a gas separating membrane prepared from a polymer of the monomer of the formula (1) in an amount of up to 100% by weight and other ethylenically unsaturated monomer in an amount of not more than 50% by weight, based on the combined weight of the monomer of the formula (1) and the other ethylenically unsaturated monomer.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: May 23, 1989
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Takashi Yasuhara, Takahiro Kitahara
  • Patent number: 4810766
    Abstract: Disclosed are an acryloxyorganosiloxane polymer having a structural unit represented by the formula (1): ##STR1## wherein X.sup.1 is chlorine atom or fluorine atom, X.sup.2 and X.sup.3 are the same or different and each represent hydrogen atom or a group --CH.sub.2 (CF.sub.2).sub.p CF.sub.3 (wherein p is 0 or an integer of 1 to 5), Y is oxygen atom or --NH-- group, m is 0 or an integer of 1 to 5 and n is 0 or an integer of 1 to 5; an acryloxyorganosiloxane polymer further having a structural unit represented by the following formula (2) in an amount of not more than 50% by weight based on the combined weight of the structural unit of the formula (1) and the structural unit of the formula (2): ##STR2## wherein X.sup.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: March 7, 1989
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Takashi Yasuhara, Takahiro Kitahara
  • Patent number: 4684705
    Abstract: The contact lenses of the present invention are formed of copolymers with monomers having hydroxyl groups and fluoroalkyl groups as their components. This invention makes it possible to provide contact lenses which are excellent not only in oxygen permeability, wettability and hardness, but also in contamination resistance to protein, lipids, etc., and transparency, etc.
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: August 4, 1987
    Assignee: Kuraray Co., Ltd.
    Inventors: Fumio Yamamoto, Takayoshi Suzuki, Masahiro Ikari, Susumu Saito, Akira Ohmori, Takashi Yasuhara
  • Patent number: 4644043
    Abstract: This invention provides a polymer of .alpha.-fluoroacrylate derivative having a structural unit represented by the formula ##STR1## wherein X is fluorine or fluoroalkyl having 1 to 3 carbon atoms, m is an integer of 1 to 3 and n is an integer of 0 to 5.
    Type: Grant
    Filed: October 29, 1985
    Date of Patent: February 17, 1987
    Assignee: Daikin Industries Ltd.
    Inventors: Akira Ohmori, Takashi Yasuhara, Naoaki Izutani, Yasufumi Ueda
  • Patent number: 4353002
    Abstract: A rotary electrical machine connected to a rotary machine heated to high-temperature, such as a heater roll used for processing fibers, a ventilation fan for ventilating a high-temperature furnace, etc., includes a rotary shaft journaled by bearing means of the rotary electrical machine including a first member formed of material of low thermal conductivity for supporting a rotor, and a second member formed of material of high hardness constituting an output end portion of the rotary shaft remote from the bearing means. The first member and the second member are united together in a position located opposite the rotor with respect to the bearing means and spaced apart from the bearing means. Cooling means, such as a heat dissipating fan, heat dissipating fins, etc., is mounted on a portion of the rotary shaft between the vicinity of the joint of the two members and the bearing means.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: October 5, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Kobayashi, Yasuharu Tamuro, Takashi Yasuhara, Kunio Ishii