Patents by Inventor Mamoru Tachikawa

Mamoru Tachikawa 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: 10564164
    Abstract: An object of the present invention is to provide a fluorescent probe that easily penetrates a cell and is capable of selectively and efficiently detecting singlet oxygen generated in the cell, a singlet oxygen detection agent containing the fluorescent probe, and a singlet oxygen detection method using the fluorescent probe. The fluorescent probe for detecting singlet oxygen comprises a compound having a silicon-rhodamine skeleton and a skeleton that increases the fluorescence of the fluorescent probe after trapping singlet oxygen to be greater than the fluorescence before trapping singlet oxygen, or a salt, hydrate, or solvate thereof.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: February 18, 2020
    Assignee: Osaka University
    Inventors: Tetsuro Majima, Sooyeon Kim, Takashi Tachikawa, Mamoru Fujitsuka
  • Publication number: 20150207056
    Abstract: Disclosed is an aluminum-magnesium-silicon composite material that contains an alloy comprising Al, Mg, and Si and can be used favorably as a material for a thermoelectric conversion module, and that has excellent thermoelectric conversion properties. The aluminum-magnesium-silicon composite material contains an alloy comprising Al, Mg and Si, and has an electrical conductivity (?) of 1000-3000 S/cm at 300 K. This aluminum-magnesium-silicon composite material is favorable in the production of a thermoelectric exchange element as a result of having excellent thermoelectric conversion properties.
    Type: Application
    Filed: March 27, 2015
    Publication date: July 23, 2015
    Applicant: Tokyo University of Science Educational Foundation Administrative Organization
    Inventors: Tsutomu IIDA, Naoki FUKUSHIMA, Tatsuya SAKAMOTO, Yohiko MITO, Hirokuni NANBA, Yutaka TAGUCHI, Masayasu AKASAKA, Mamoru TACHIKAWA, Takakazu HINO
  • Patent number: 9045647
    Abstract: A surface treatment composition comprises a polyfluoropolyether silane. The polyfluoropolyether silane and the surface treatment composition are produced by reacting a perfluoropolyether-containing compound and a hydrosilane in the presence of a hydrosilylation catalyst and an isomer reducing agent.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: June 2, 2015
    Assignees: DOW CORNING CORPORATION, DAIKIN INDUSTRIES, LTD.
    Inventors: Don Lee Kleyer, Yasushi Sugiura, Mamoru Tachikawa, Yoshinori Taniguchi, Peter Hupfield, Yasuo Itami, Masahiko Maeda, Tetsuya Masutani, Tomohiro Yoshida
  • Publication number: 20130228100
    Abstract: A surface treatment composition comprises a polyfluoropolyether silane. The polyfluoropolyether silane and the surface treatment composition are produced by reacting a perfluoropolyether-containing compound and a hydrosilane in the pres-ence of a hydrosilylation catalyst and an isomer reducing agent.
    Type: Application
    Filed: November 10, 2011
    Publication date: September 5, 2013
    Inventors: Don Lee Kleyer, Yasushi Sugiura, Mamoru Tachikawa, Yoshinori Taniguchi, Peter Hupfield, Yasuo Itami, Masahiko Maeda, Tetsuya Masutani, Tomohiro Yoshida
  • Patent number: 8349217
    Abstract: The present invention has features in that a lithium transition metal silicate obtained by sintering a mixture containing a transition metal compound containing at least one transition metal selected from the group consisting of Mn, Fe, Co and Ni; a lithium compound; and a silicon-based polymer compound, is used as a positive electrode material for a secondary battery. The lithium transition metal silicate of the present invention has a high lithium occlusion and release efficiency per unit amount of a transition metal. A secondary battery in which the cost is low, stability and safety are high, and superior charge and discharge characteristics are exhibited can be provided.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: January 8, 2013
    Assignees: Tokyo Institute of Technology, Dow Corning Toray Co., Ltd
    Inventors: Atsuo Yamada, Shogo Hayase, Yoshiki Fujita, Shinichi Nishimura, Mamoru Tachikawa, Takakazu Hino
  • Publication number: 20120118343
    Abstract: Disclosed is an aluminum-magnesium-silicon composite material that contains an alloy comprising Al, Mg, and Si and can be used favorably as a material for a thermoelectric conversion module, and that has excellent thermoelectric conversion properties. The aluminum-magnesium-silicon composite material contains an alloy comprising Al, Mg and Si, and has an electrical conductivity (?) of 1000-3000 S/cm at 300 K. This aluminum-magnesium-silicon composite material is favorable in the production of a thermoelectric exchange element as a result of having excellent thermoelectric conversion properties.
    Type: Application
    Filed: July 26, 2010
    Publication date: May 17, 2012
    Inventors: Tsutomu Iida, Naoki Fikushima, Tatsuya Sakamoto, Yohiko Mito, Hirokuni Nanba, Yutaka Taguchi, Masayasu Akasaka, Mamoru Tachikawa, Takakazu Hino
  • Publication number: 20100140540
    Abstract: The present invention has features in that a lithium transition metal silicate obtained by sintering a mixture containing a transition metal compound containing at least one transition metal selected from the group consisting of Mn, Fe, Co and Ni; a lithium compound; and a silicon-based polymer compound, is used as a positive electrode material for a secondary battery. The lithium transition metal silicate of the present invention has a high lithium occlusion and release efficiency per unit amount of a transition metal. A secondary battery in which the cost is low, stability and safety are high, and superior charge and discharge characteristics are exhibited can be provided.
    Type: Application
    Filed: March 26, 2008
    Publication date: June 10, 2010
    Inventors: Atsuo Yamada, Shogo Hayase, Yoshiki Fujita, Shinichi Nishimura, Mamoru Tachikawa, Takakazu Hino
  • Patent number: 7022800
    Abstract: A moisture curable composition capable of cure to an elastomeric body, comprising a polymeric material having not less than two hydroxyl or hydrolyzable groups an alkoxysilane curative and a catalyst comprising: a mixture and/or reaction product of a compound (i) M[OR]4 and compound (ii) M[OR?]x[Z]z, wherein M represents a metal having a valency of 4 selected from Group IVB of the Periodic Table, preferably titanium or zirconium.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: April 4, 2006
    Assignee: Dow Corning S.A.
    Inventors: Mamoru Tachikawa, Toshio Saruyama, Kazutoshi Okabe, Hiroshi Adachi, Francois De Buyl, Luo Cheng Zhang
  • Patent number: 6326506
    Abstract: A method of preparing an organosilicon compound comprising effecting a hydrosilylation reaction between (a) unsaturated compounds with terminal unsaturated groups and (b) silane compounds described by formula HSiR0mW3−m, where W is selected from the group consisting of C1 to C6 alkoxy groups, C6 to C10 aryloxy groups, and halogen atoms, R0 is an organic group, and m is 0, 1, or 2 in the presence of (c) a platinum catalyst and (d) an auxiliary catalyst selected from the group consisting of (1) silyl esters of acids derived from oxo acids of sulfur; (2) amide compounds having N—Si bonds; (3) urea compounds; (4) silyl esters of carbamic acid; (5) phosphoric acid compounds; and (6) cyclic compounds selected from the group consisting of (i) hydroxypyridine compounds, (ii) 8-hydroxyquinoline compounds, (iii) oxazolidinone compounds, and (iv) N-hydroxysuccinimide compounds.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: December 4, 2001
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Mamoru Tachikawa, Kasumi Takei
  • Patent number: 6297340
    Abstract: A hydrosilylation reaction method that achieves high catalytic activity and stability, and improves the positional selectivity of the hydrosilylation reaction product. The method comprises reacting an unsaturated compound selected from the group consisting of aromatic vinyl compounds and allyl halides with a silicon compound having hydrosilyl groups described by formula HSiRn(Z)3−n, where n=0, 1, or 2, R is a hydrocarbon group and Z is selected from the group consisting of a silamino group, siloxy group, and siloxanoxy group in the presence of a carboxylic acid compound, a silyl ester of a sulfonic acid, and a platinum catalyst.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: October 2, 2001
    Assignee: Dow Corning Asia, Ltd.
    Inventor: Mamoru Tachikawa
  • Patent number: 6258506
    Abstract: The instant invention pertains to a curable composition comprising (a) substance that generates free radicals under the action of ultraviolet radiation and (b) polymer molecule bearing functionality capable of polymerization under the action of said free radicals wherein (a) is a benzoin ether and makes up from 0.001 to 10 wt % of the total composition and (b) has the following formula (R3SiO1/2)a(R′2SiO2/2)b(R″SiO3/2)c(SiO4/2)d in which R, R′, and R″ are each H or C1 to C10 hydrocarbyl possibly containing a heteroatom and at least 10 % is, for example, a vinyl group, and a+b+c+d=1. The composition of the instant invention is a storage-stable UV-curable composition that does not suffer from cure inhibition by air or oxygen, that is very efficiently cured by low doses of UV radiation, and provides a highly heat-resistant cured pattern by heating after pattern formation.
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: July 10, 2001
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Brian R. Harkness, Mamoru Tachikawa, Kasumi Takei
  • Patent number: 6191220
    Abstract: A method for making a hydrocarbon oxysilyl functional polymer, which is important as a modified silicone or silicone-modified polymer, by a hydrosilylation reaction between a hydride (hydrocarbonoxy)silane compound having SiH functional groups and a polymer having olefinic or acetylenic unsaturated groups in the presence of a carboxylic acid and a catalytic amount of platinum or a platinum compound.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: February 20, 2001
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Kasumi Takeuchi Kasumi Takei, Mamoru Tachikawa
  • Patent number: 6175031
    Abstract: A method for synthesizing silicon compounds that contain a substituent bonded to silicon through a Si—C bond comprising a platinum-catalyzed hydrosilylation reaction between SiH-substituted silicon compounds and unsaturated group-functional organic compounds or unsaturated group-functional organosilicon compounds and exhibits a high catalyst activity and stability and affords a high positional selectivity in the hydrosilylation reaction product.
    Type: Grant
    Filed: March 7, 2000
    Date of Patent: January 16, 2001
    Assignee: Dow Corning Asia, Ltd.
    Inventor: Mamoru Tachikawa
  • Patent number: 6111126
    Abstract: A method for synthesizing organosilicon compounds that contain a functional group bonded to silicon across the Si--C bond. The method comprises reacting an unsaturated group-functional organic compound or unsaturated group-functional organosilicon compound with a hydro(hydrocarbonoxy)silane compound, where the reaction is carried out in the presence of a platinum catalyst.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: August 29, 2000
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Mamoru Tachikawa, Kasumi Takei
  • Patent number: 6096483
    Abstract: The present invention provides a curable composition which comprises (A) a base-generating substance which generates a base when exposed to the action of ultraviolet light, (B) a siloxane polymer which has silicon-hydrogen bonds (Si--H) capable of reacting with hydroxy groups under the effect of the base to form silicon-oxygen bonds (Si--O) and hydrogen molecules (H.sub.2), and (C) an acid substance. This composition is cured by irradiation with ultraviolet light. During this ultraviolet irradiation, a mask is placed between a coating film of the composition and the radiation source, and the uncured portions of the composition are dissolved and removed so that a pattern is formed. The residual portions are then heated to produce a pattern-cured product.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: August 1, 2000
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Brian R. Harkness, Mamoru Tachikawa, Kasumi Takei
  • Patent number: 6060620
    Abstract: A method of manufacturing acyloxysilane compounds having functional groups bonded to a silicon atom via Si--C bonds comprising reacting in a hydrosilation reaction an unsaturated compound (a) selected from the group consisting of (i) styrene or styrene derivative, (ii) vinylsilane compound, (iii) siloxane compound having a vinyl group bonded directly to a silicon atom, (iv) epoxy-functional olefin, (v) diene compound, (vi) allyl compound described by formula CH.sub.2 .dbd.CHCH.sub.2 X, where X is a halogen atom, an alkoxy group, or an acyloxy group, (vii) olefin compound having a terminal vinyl group, and (viii) acetylene-type compound with a silicon compound (b) that contains hydrogen atom bonded to the silicon atom and acyloxy group in the presence of a platinum catalyst.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: May 9, 2000
    Assignee: Dow Corning Asia, Ltd.
    Inventor: Mamoru Tachikawa
  • Patent number: 6054602
    Abstract: A process comprising the hydrosilation of an aromatic vinyl compound by a hydridochlorosilane compound in the present of platinum or platinum compound and a carboxylic acid. The process favors the formation of the .beta.-adduct of the hydrosilation reaction.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: April 25, 2000
    Assignee: Dow Corning Asia, Ltd.
    Inventor: Mamoru Tachikawa
  • Patent number: 6051625
    Abstract: The instant invention pertains to a curable composition comprising(a) substance that generates free radicals under the action of ultraviolet radiation and(b) polymer molecule bearing functionality capable of polymerization under the action of said free radicals wherein (a) is a benzoin ether and makes up from 0.001 to 10 wt % of the total composition and (b) has the following formula(R.sub.3 SiO.sub.1/2).sub.a (R'.sub.2 SiO.sub.2/2).sub.b (R"SiO.sub.3/2).sub.c (SiO.sub.4/2).sub.din which R, R', and R" are each H or C.sub.1 to C.sub.10 hydrocarbyl possibly containing a heteroatom and at least 10% is, for example, a vinyl group, and a+b+c+d=1. The composition of the instant invention is a storage-stable UV-curable composition that does not suffer from cure inhibition by air or oxygen, that is very efficiently cured by low doses of UV radiation, and provides a highly heat-resistant cured pattern by heating after pattern formation.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: April 18, 2000
    Assignee: Dow Corning Asia, LTD.
    Inventors: Brian R. Harkness, Mamoru Tachikawa, Kasumi Takei
  • Patent number: 6048994
    Abstract: A method for hydrosilylating a vinyl-substituted aromatic compound comprising reacting a hydrido (hydrocarbonoxy)silane compound with the vinyl-substituted aromatic compound in the presence of a platinum or platinum compound catalyst and a carboxylic acid. The presence of the carboxylic acid increases the positional selectivity of addition in the hydrosilylation reaction and reduces the polymerization of vinyl groups even in the case of a high-temperature or long-term hydrosilylation reaction.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: April 11, 2000
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Mamoru Tachikawa, Kasumi Takei
  • Patent number: 5994573
    Abstract: A method for making a triarylamine having a hydrocarbon oxysilyl group SiOR', where R' is an organic group comprising 1 to 10 carbon atoms, which is important as a hole transfer substance in electronic applications, at a high yield and high position selectivity, comprising reacting a hydrido (hydrocarbonoxy)silane compound with a triarylamine having a vinyl group in the presence of platinum or platinum compound catalyst and a carboxylic acid compound.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: November 30, 1999
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Mamoru Tachikawa, Kasumi Takei