Patents by Inventor Takushi Yokoyama

Takushi Yokoyama 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: 7618506
    Abstract: A gas generating composition which can prevent formation of mist is provided. A gas generating composition comprising (a) a glass powder, (b) aluminum hydroxide and/or magnesium hydroxide, (c) an organic compound as fuel, and (d) an oxygen-containing oxidizing agent. By the action of the component (a), combustion residues can be solidified to form a slag, thus preventing formation of mist.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: November 17, 2009
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Takushi Yokoyama, Mamoru Watabiki, Jianzhou Wu
  • Publication number: 20040154712
    Abstract: A gas generating composition which can prevent formation of mist is provided. A gas generating composition comprising (a) glass powder, (b) aluminum hydroxide and/or magnesium hydroxide, (c) an organic compound as fuel, and (d) an oxygen-containing oxidizing agent. By the action of the component (a), combustion residues can be solidified to form a slag, thus preventing formation of mist.
    Type: Application
    Filed: October 30, 2003
    Publication date: August 12, 2004
    Inventors: Takushi Yokoyama, Mamoru Watabiki, Jianzhou Wu
  • Patent number: 6527886
    Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: March 4, 2003
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
  • Patent number: 6497774
    Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: December 24, 2002
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
  • Patent number: 6454887
    Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.
    Type: Grant
    Filed: September 23, 1999
    Date of Patent: September 24, 2002
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
  • Publication number: 20010000383
    Abstract: A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005≦W/(2·r)≦0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.
    Type: Application
    Filed: December 20, 2000
    Publication date: April 26, 2001
    Applicant: Daicel Chemical Industries, Ltd.
    Inventors: Yo Yamato, Norimasa Hirata, Takeshi Takahori, Takushi Yokoyama, Naoki Matsuda
  • Patent number: 6136224
    Abstract: A gas generant for an air, which is improved in the defects of gas generants using sodium azide in a practical use and has stable combustion capability. And a molecular compound comprising (a) a gas generant component, (b) an oxidant component and (c) a reaction accelerator component, preferably represented by the composition formula (I).M.mX.nY (I)[wherein, M is Al Mg, Ca, Cr, Cu, Zn, Mn, Fe, Co, Sr, Ni and another metal components; X is a nitrogen-containing compound having 0 or 1 carbon atom; Y is an anion such as NO.sub.3 and ClO; m is a number of 1 to 3; and n is a number 2 to 3].
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: October 24, 2000
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Jianzhou Wu, Norimasa Hirata, Takushi Yokoyama
  • Patent number: 6073962
    Abstract: The present invention is directed to an airbag system that includes a gas generant, which is improved in the defects of gas generants using sodium azide in a practical use and has stable combustion capability. A molecular compound comprising (a) a gas generant component, (b) an oxidant component and (c) a reaction accelerator component, preferably represented by the composition formula (I).M.mX.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: June 13, 2000
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Jianzhou Wu, Norimasa Hirata, Takushi Yokoyama
  • Patent number: 4209467
    Abstract: A hydroformylation process in which the catalyst is the reaction product of a cobalt carbonyl compound with a nitrogen-containing heterocyclic compound having an enolic hydroxyl group on the carbon atom adjacent to the ring-forming nitrogen atom or the catalyst is the reaction product of a .beta.-dioxo cobalt compound and a nitrogen-containing base having a double bonded carbon atom at the .alpha.-position, with carbon monoxide and hydrogen.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: June 24, 1980
    Assignee: Daicel Ltd.
    Inventors: Hidetaka Kojima, Shingo Oda, Takushi Yokoyama, Yasukazu Murakami
  • Patent number: 4118388
    Abstract: A process for producing pyridine which comprises oxidatively dealkylating an alkylpyridine, an alkenylpyridine or a mixture thereof in the gaseous phase with molecular oxygen and steam in the presence of a catalyst comprising active components with a general composition of the formulav.sub.a X.sub.b Ag.sub.c O.sub.wherein a, c, and d respectively represent the atomic proportions of vanadium, silver and oxygen; X represents at least one element selected from the group consisting of chromium, molybdenum and tungsten; b represents the atomic proportion of X; and when a is 1, b is about 0.1 to about 1.5, c is about 0.005 to about 1.0, and d represents the atomic proportion of oxygen, is a value determined by the atomic valences of the individual V, X and Ag elements and is about 2.6 to about 7.5; and separating pyridine from the reaction product.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: October 3, 1978
    Assignee: Daicel, Ltd.
    Inventors: Takushi Yokoyama, Hidetaka Kojima, Masaharu Uragami, Kathuyoshi Miwa
  • Patent number: 4052462
    Abstract: A catalyst cmposition for the gas phase oxidation of .alpha.,.beta.-unsaturated olefinic hydrocarbons comprising at least two metal oxides, at least one of which contains molybdenum, and a silica carrier having a specific surface area of at least 250 m.sup.2 /g, the catalyst composition as a whole having a specific surface area of from 100 to 250 m.sup.2 /g.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: October 4, 1977
    Assignee: Daicel Ltd.
    Inventors: Kouzou Sakakibara, Iwao Abe, Takushi Yokoyama, Kazuyuki Matuokadeclare
  • Patent number: 3984477
    Abstract: A catalyst for preparing .alpha.,.beta.-unsaturated aldehydes by the gas phase catalytic oxidation of .alpha.,.beta.-unsaturated hydrocarbons, which catalyst contains as indispensable metal components molybdenum, bismuth and at least one transition metal selected from iron, nickel and cobalt. A chelating agent, or a chelate compound of any of the metals comprising the catalyst, is added to all or some of the starting liquid mixtures during the catalyst preparation stage, whereby to increase the catalytic activity of the catalyst so that the desired .alpha.,.beta.-unsaturated aldehyde products such as acrolein and methacrolein can be obtained in high yields. In catalysts of this type, the catalytic activity can be maintained at a high level even if the catalyst does not contain an arsenic component.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: October 5, 1976
    Assignee: Daicel, Ltd.
    Inventors: Masayochi Kubo, Kazuyuki Matsuoka, Takushi Yokoyama