Patents by Inventor Akitsugu Kurita

Akitsugu Kurita 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: 6136766
    Abstract: A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula: ##STR1## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and l is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula: ##STR2## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7). To use it as a water system cleaning agent, polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water are additionally mixed. Accordingly, a cleaning effect free from environmental destruction and contamination, equivalent to flon containing cleaning agents, and satisfactorily stable in terms of dispersion as a water system cleaning agent can be obtained.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: October 24, 2000
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5985810
    Abstract: A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula: ##STR1## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and l is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula: ##STR2## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7). To use it as a water system cleaning agent, polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water are additionally mixed. Accordingly, a cleaning effect free from environmental destruction and contamination, equivalent to flon containing cleaning agents, and satisfactorily stable in terms of dispersion as a water system cleaning agent can be obtained.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 16, 1999
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5977040
    Abstract: A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula: ##STR1## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula: ##STR2## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7). To use it as a water system cleaning agent, polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water are additionally mixed. Accordingly, a cleaning effect free from environmental destruction and contamination, equivalent to flon containing cleaning agents, and satisfactorily stable in terms of dispersion as a water system cleaning agent can be obtained.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 2, 1999
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5741367
    Abstract: A method for drying parts that includes contacting the part with a liquid removing composition that contains a straight chain or cyclic polyorganosiloxane.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 21, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5741365
    Abstract: A continuous method for cleaning and/or removing liquid from industrial parts that includes contacting the part with a cleaning or rinsing composition that contains a straight chain or cyclic polyorganosiloxane.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: April 21, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5728228
    Abstract: A method for removing liquid from parts that includes contacting the part with a cleaning or rinsing composition that contains a straight chain or cyclic polyorganosiloxane.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: March 17, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5716456
    Abstract: A method for cleaning an industrial object by use of an aqueous agent that includes a polyorganosiloxane. The method uses a plurality of vessels and the agent is recovered and resupplied to the method.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 10, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5443747
    Abstract: A cleaning composition comprising at least one low molecular weight polyorganosiloxane selected from the group consisting of straight chain polydiorganosiloxane represented by a general formula: ##STR1## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and 1 is an integer from 0 to 5), and cyclic polydiorganosiloxane represented by a general formula: ##STR2## (wherein R.sup.1 is an organic group of single valence substituted by the same or different group or unsubstituted, and m is an integer from 3 to 7). To use it as a water system cleaning agent, polyoxyalkylene group containing polyorganosiloxane, a surfactant, and water are additionally mixed. Accordingly, a cleaning effect free from environmental destruction and contamination, equivalent to flon containing cleaning agents, and satisfactorily stable in terms of dispersion as a water system cleaning agent can be obtained.
    Type: Grant
    Filed: February 28, 1991
    Date of Patent: August 22, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Minoru Inada, Kimiaki Kabuki, Yasutaka Imajo, Takayuki Oguni, Noriaki Yagi, Nobuhiro Saitoh, Akitsugu Kurita, Yoshiaki Takezawa
  • Patent number: 5250615
    Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: October 5, 1993
    Assignees: Japan Synthetic Rubber Co., Ltd., Toshiba Silicone Co., Ltd.
    Inventors: Yuji Yamamoto, Takashi Kurata, Kazuyoshi Nakazawa, Yusuke Tsuda, Junichiro Watanabe, Makoto Matsumoto, Akitsugu Kurita, Yuichi Funahashi
  • Patent number: 5147947
    Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: September 15, 1992
    Assignees: Japan Synthetic Rubber Co., Ltd., Toshiba Silicone Co., Ltd.
    Inventors: Yuji Yamamoto, Takashi Kurata, Kazuyoshi Nakazawa, Yusuke Tsuda, Junichiro Watanabe, Makoto Matsumoto, Akitsugu Kurita, Yuichi Funahashi
  • Patent number: 5032643
    Abstract: There is disclosed a process for producing polyorganosiloxanes, comprising that an organosiloxane having a structural unit represented by the following general formula: ##STR1## (in which R.sup.1 represents a substituted or unsubstituted monovalent organic group; and n represents an integer of 0 tp 3) is subjected to emulsion polymerization in an aqueous medium in the presence of an organic sulfonic acid and a trihalogenated acetic acid.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: July 16, 1991
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Makoto Matsumoto, Junichiro Watanabe, Akitsugu Kurita, Yuichi Funahashi
  • Patent number: 4985286
    Abstract: An abrasion-concealing agent for glass containers, which comprises (A) a polyorganosiloxane and (B) a volatile polydimethylsiloxane, a glass container in which abrasions on the surface thereof have been concealed by the abrasion-concealing agent, and a method for concealing abrasions on a glass container by using the abrasion-concealing agent. The abrasion-concealing agent has excellent abrasion-concealing properites, film strength, water resistance, safety, workability and resistance to an aqueous alkaline solution washing, and does not cause any damage to labels on glass containers in the coating process.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: January 15, 1991
    Assignees: Toshiba Silicone Co. Ltd., Asahi Breweries, Ltd.
    Inventors: Akitsugu Kurita, Yoshiaki Takezawa, Nobuhiro Saitoh, Takehisa Shimada, Hideaki Takemoto
  • Patent number: 4656221
    Abstract: Disclosed is a composition for concealing graze marks on a transparent glass bottle which comprises:(A) 100 parts by weight of polydiorganosiloxane having a viscosity of 10 to 100,000 cSt at 25.degree. C.
    Type: Grant
    Filed: June 14, 1985
    Date of Patent: April 7, 1987
    Assignees: Toshiba Silicone Co., Ltd., Asahi Breweries Ltd.
    Inventors: Akitsugu Kurita, Kazou Maruyama, Akira Okusa, Haruo Hayashi
  • Patent number: 4602959
    Abstract: Disclosed is a method for preventing multiplication of algae which is characterized by coating the surfaces of solid materials with a silicone emulsion composition prepared by emulsion polymerization of:(1) 0.1 to 60% by weight of a reaction product prepared by reacting(A) 50 to 99.9% by weight of a polydiorganosilozane having more than one silanol group on the average in each molecule and having a viscosity of 5 to 10,000 cSt at 25.degree. C. with(B) 0.1 to 50% by weight of a product prepared by reacting (a) 1 mol of a compound represented by the formula: ##STR1## wherein Q.sup.1 is a monovalent group selected from the group consisting of a hydrogen atom, --CH.sub.3, --CH.sub.2 CH.sub.2 NH.sub.2 and --CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 NH.sub.2, R.sup.1 is a divalent hydrocarbon group having 1 to 4 carbon atoms, R.sup.2 and R.sup.3 are monovalent hydrocarbon groups each having 1 to 4 carbon atoms, and a is an integer of 0 or 1,with (b) 0.5 to 3.
    Type: Grant
    Filed: April 17, 1985
    Date of Patent: July 29, 1986
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Akitsugu Kurita, Shinji Kida, Masaaki Otsuki
  • Patent number: 4559319
    Abstract: A curing agent composition for silicone elastomers, comprising an organic tin compound which is solubilized in water with the use of a nonionic surfactant selected from the group consisting of polyoxyethylene sorbitol fatty acid esters and polyoxyethylene sorbitan fatty acid esters and a polyvalent alcohol.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: December 17, 1985
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Akitsugu Kurita, Tetsuo Fujimoto
  • Patent number: 4502889
    Abstract: A silicone emulsion composition containing a reinforcing amount of alumina sol blended in an emulsion precursor obtained by emulsifying a polydiorganosiloxane having at least one silanol group per molecule, one nonionic surfactant and the remainder water.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: March 5, 1985
    Assignee: Toshiba Silicone Co., Ltd.
    Inventor: Akitsugu Kurita
  • Patent number: 4467068
    Abstract: A composition for concealing grazes or scratches on glass surfaces comprising an emulsion of composition (A) and composition (B), said composition (A) comprising the emulsion-polymerization product of:(1) 0.1-60 weight percent of (A) of the reaction product of:(a) 0.1-50 weight percent of (a) and (b) of the product obtained by reacting:(i) 1 mole of a compound of the formula Q.sup.1 NHR.sup.1 SiR.sub.a.sup.2 (OR).sub.3-a with(ii) 0.5-3.0 moles of a compound of the formula Q.sup.2 R.sup.4 SiR.sub.a.sup.2 (OR).sup.6).sub.3-b ;(b) 50-99.9 weight percent of (a) and (b) of a polydiorganosiloxane having at least one silanol group and a viscosity at 25.degree. C. of 5-10,000 cSt;(2) 1-50 weight percent of (A) of a compound of the formula (R.sup.7 R.sup.8 SiO).sub.n ;(3) 0.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: August 21, 1984
    Assignee: Toshiba Silicone Co., Ltd.
    Inventors: Kazo Maruyama, Akitsugu Kurita
  • Patent number: 4412035
    Abstract: The present invention relates to a silicone cationic emulsion composition of a polydioganosiloxane containing amino, epoxy, and hydroxyl groups as functional groups, and which may be used as a releasing agent, stripping agent, paint component, and anti-foaming agent.
    Type: Grant
    Filed: May 24, 1982
    Date of Patent: October 25, 1983
    Assignee: Toshiba Silicones Ltd.
    Inventor: Akitsugu Kurita
  • Patent number: 4378389
    Abstract: A silicone base release or lubricating agent is disclosed which is comprised of the reaction product of a silanol-containing polydiorganosiloxane fluid with a first reaction product of epoxy or glycidoxy functional silanes and aminofunctional silanes.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: March 29, 1983
    Assignee: Toshiba Silicones Ltd.
    Inventors: Kazo Maruyama, Shuhei Kosaka, Akitsugu Kurita