Patents by Inventor Yusuke Ohsawa

Yusuke Ohsawa 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: 9988350
    Abstract: The present invention provides a compound represented by the general formula (I): in the formula, R1, R2 and R3 are each a hydrogen atom, a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group or the like, R4 is a C1-6 alkyl group or the like, R5 is a C1-6 alkyl group or the like, R6 is a C1-6 alkyl group or the like, R7 is a hydrogen atom, a halogen atom, a C1-6 alkyl group or the like, R8 is a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group, a C1-6 alkoxy group or the like, and R9 is a hydrogen atom or a C1-6 alkyl group, or a pharmaceutically acceptable salt thereof. The compounds of the present invention have an excellent S1P1 receptor antagonistic activity and therefore are useful as an agent for the treatment or prevention of autoimmune diseases and the like.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: June 5, 2018
    Assignee: KISSEI PHARMACEUTICAL CO., LTD.
    Inventors: Hitoshi Inoue, Kohsuke Ohno, Tetsuya Nakamura, Yusuke Ohsawa
  • Publication number: 20170320821
    Abstract: [Problem] The present invention provides a novel compound having an S1P1 receptor antagonistic activity. [Solution] The present invention provides a compound represented by the general formula (I): (in the formula, Rl, R2 and R3 are each a hydrogen atom, a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group or the like, R4 is a C1-6 alkyl group or the like, R5 is a C1-6 alkyl group or the like, R6 is a C1-6 alkyl group or the like, R7 is a hydrogen atom, a halogen atom, a C1-6 alkyl group or the like, R8 is a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group, a C1-6 alkoxy group or the like, and R9 is a hydrogen atom or a C1-6 alkyl group.) or a pharmaceutically acceptable salt thereof, a pharmaceutical compositions containing same, and use thereof. The compounds of the present invention have an excellent S1P1 receptor antagonistic activity and therefore are useful as an agent for the treatment or prevention of antoimmune diseases and the like.
    Type: Application
    Filed: July 26, 2017
    Publication date: November 9, 2017
    Applicant: KISSEI PHARMACEUTICAL CO., LTD.
    Inventors: Hitoshi Inoue, Kohsuke Ohno, Tetsuya Nakamura, Yusuke Ohsawa
  • Patent number: 9718771
    Abstract: A compound having an S1P1 receptor antagonistic activity. A compound represented by general formula (I): (in the formula, R1, R2 and R3 are each a hydrogen atom, a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group or the like, R4 is a C1-6 alkyl group or the like, R5 is a C1-6 alkyl group or the like, R6 is a C1-6 alkyl group or the like, R7 is a hydrogen atom, a halogen atom, a C1-6 alkyl group or the like, R8 is a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group, a C1-6 alkoxy group or the like, and R9 is a hydrogen atom or a C1-6 alkyl group.) or a pharmaceutically acceptable salt thereof, a pharmaceutical compositions containing same, and use thereof. The compounds have an excellent S1P1 receptor antagonistic activity and are useful for the treatment or prevention of autoimmune diseases.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: August 1, 2017
    Assignee: KISSEI PHARMACEUTICAL CO., LTD.
    Inventors: Hitoshi Inoue, Kohsuke Ohno, Tetsuya Nakamura, Yusuke Ohsawa
  • Publication number: 20160362368
    Abstract: [Problem] The present invention provides a novel compound having an S1P1 receptor antagonistic activity. [Solution] The present invention provides a compound represented by the general formula (I): (in the formula, R1, R2 and R3 are each a hydrogen atom, a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group or the like, R4 is a C1-6 alkyl group or the like, R5 is a C1-6 alkyl group or the like, R6 is a C1-6 alkyl group or the like, R7 is a hydrogen atom, a halogen atom, a C1-6 alkyl group or the like, R8 is a halogen atom, a C1-6 alkyl group, a halo C1-6 alkyl group, a C1-6 alkoxy group or the like, and R9 is a hydrogen atom or a C1-6 alkyl group.) or a pharmaceutically acceptable salt thereof, a pharmaceutical compositions containing same, and use thereof. The compounds of the present invention have an excellent S1P1 receptor antagonistic activity and therefore are useful as an agent for the treatment or prevention of autoimmune diseases and the like.
    Type: Application
    Filed: February 27, 2015
    Publication date: December 15, 2016
    Applicant: Kissei Pharmaceutical Co., Ltd.
    Inventors: Hitoshi Inoue, Kohsuke Ohno, Tetsuya Nakamura, Yusuke Ohsawa
  • Patent number: 8808562
    Abstract: A method of etching an aluminum-containing layer on a substrate is described. The method includes forming plasma from a process composition containing a halogen element, and exposing the substrate to the plasma to etch the aluminum-containing layer. The method may additionally include exposing the substrate to an oxygen-containing environment to oxidize a surface of the aluminum-containing layer and control an etch rate of the aluminum-containing layer. The method may further include forming first plasma from a process composition containing HBr and an additive gas having the chemical formula CxHyRz (wherein R is a halogen element, x and y are equal to unity or greater, and z is equal to zero or greater), forming second plasma from a process composition containing HBr, and exposing the substrate to the first plasma and the second plasma to etch the aluminum-containing layer.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: August 19, 2014
    Assignee: Tokyo Electron Limited
    Inventors: Yusuke Ohsawa, Hiroto Ohtake, Eiji Suzuki, Kaushik Arun Kumar, Andrew W. Metz
  • Patent number: 8486792
    Abstract: A silicon compound gas, an oxidizing gas, and a rare gas are supplied into a chamber (2) of a plasma processing apparatus (1). A microwave is supplied into the chamber (2), and a silicon oxide film is formed on a target substrate with plasma generated by the microwave. A partial pressure ratio of the rare gas is 10% or more of a total gas pressure of the silicon compound gas, the oxidizing gas, and the rare gas, and an effective flow ratio of the silicon compound gas and the oxidizing gas (oxidizing gas/silicon compound gas) is not less than 3 but not more than 11.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: July 16, 2013
    Assignee: Tokyo Electron Limited
    Inventors: Hirokazu Ueda, Yoshinobu Tanaka, Yusuke Ohsawa, Toshihisa Nozawa, Takaaki Matsuoka
  • Publication number: 20130065398
    Abstract: A method of etching an aluminum-containing layer on a substrate is described. The method includes forming plasma from a process composition containing a halogen element, and exposing the substrate to the plasma to etch the aluminum-containing layer. The method may additionally include exposing the substrate to an oxygen-containing environment to oxidize a surface of the aluminum-containing layer and control an etch rate of the aluminum-containing layer. The method may further include forming first plasma from a process composition containing HBr and an additive gas having the chemical formula CxHyRz (wherein R is a halogen element, x and y are equal to unity or greater, and z is equal to zero or greater), forming second plasma from a process composition containing HBr, and exposing the substrate to the first plasma and the second plasma to etch the aluminum-containing layer.
    Type: Application
    Filed: September 12, 2011
    Publication date: March 14, 2013
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Yusuke OHSAWA, Hiroto OHTAKE, Eiji SUZUKI, Kaushik Arun KUMAR, Andrew W. METZ
  • Patent number: 8288252
    Abstract: There is provided a damage recovery method capable of recovering electrical characteristics of a low dielectric insulating film sufficiently while suppressing oxidation of buried metal and generation of pattern defaults. A damaged functional group generated in a surface of the low dielectric insulating film by a processing is substituted with a hydrophobic functional group (ST. 2). A damaged component present under a dense layer generated in the surface of the low dielectric insulating film by the substitution process is recovered by using an ultraviolet heating process (ST. 3).
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: October 16, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Ryuichi Asako, Yusuke Ohsawa
  • Publication number: 20120190211
    Abstract: In a film forming method, firstly, a processing target substrate W as a base of a semiconductor device is held on a mounting table 34 by an electrostatic chuck. Then, a film forming gas is adsorbed onto the processing target substrate W (a gas adsorption process) ((A) of FIG. 6). Thereafter, the inside of the processing chamber 32 is evacuated in order to remove residues of the film forming gas ((B) of FIG. 6). Upon the completion of the first exhaust process, a plasma process using microwave is performed ((C) of FIG. 6). Upon the completion of the plasma process, the inside of the processing chamber 32 is evacuated in order to remove an unreacted reactant gas and the like ((D) of FIG. 6). These series of steps (A) to (D) are repeated in this sequence until a desired film thickness is obtained.
    Type: Application
    Filed: September 9, 2010
    Publication date: July 26, 2012
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Hirokazu Ueda, Yusuke Ohsawa, Masahiro Horigome
  • Publication number: 20120003842
    Abstract: There is provided a silicon oxide film forming method including forming a silicon oxide film on a processing target substrate W by supplying a silicon compound gas, an oxidizing gas and a rare gas into a processing chamber 32 while maintaining a surface temperature of a holding table 34 capable of holding thereon the processing target substrate W at a temperature equal to or lower than about 300° C. and by generating microwave plasma within the processing chamber 32, and performing a plasma process on the silicon oxide film formed on the processing target substrate W by supplying an oxidizing gas and a rare gas into the processing chamber 32 and by generating microwave plasma within the processing chamber 32.
    Type: Application
    Filed: December 10, 2009
    Publication date: January 5, 2012
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Hirokazu Ueda, Yusuke Ohsawa, Yoshinobu Tanaka
  • Publication number: 20110294232
    Abstract: There is provided a damage recovery method capable of recovering electrical characteristics of a low dielectric insulating film sufficiently while suppressing oxidation of buried metal and generation of pattern defaults. A damaged functional group generated in a surface of the low dielectric insulating film by a processing is substituted with a hydrophobic functional group (ST. 2). A damaged component present under a dense layer generated in the surface of the low dielectric insulating film by the substitution process is recovered by using an ultraviolet heating process (ST. 3).
    Type: Application
    Filed: August 9, 2011
    Publication date: December 1, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Ryuichi Asako, Yusuke Ohsawa
  • Patent number: 8058153
    Abstract: There is provided a damage recovery method capable of recovering electrical characteristics of a low dielectric insulating film sufficiently while suppressing oxidation of buried metal and generation of pattern defaults. A damaged functional group generated in a surface of the low dielectric insulating film by a processing is substituted with a hydrophobic functional group (ST. 2). A damaged component present under a dense layer generated in the surface of the low dielectric insulating film by the substitution process is recovered by using an ultraviolet heating process (ST. 3).
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: November 15, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Ryuichi Asako, Yusuke Ohsawa
  • Publication number: 20110074013
    Abstract: A silicon compound gas, an oxidizing gas, and a rare gas are supplied into a chamber (2) of a plasma processing apparatus (1). A microwave is supplied into the chamber (2), and a silicon oxide film is formed on a target substrate with plasma generated by the microwave. A partial pressure ratio of the rare gas is 10% or more of a total gas pressure of the silicon compound gas, the oxidizing gas, and the rare gas, and an effective flow ratio of the silicon compound gas and the oxidizing gas (oxidizing gas/silicon compound gas) is not less than 3 but not more than 11.
    Type: Application
    Filed: May 11, 2009
    Publication date: March 31, 2011
    Applicant: TOKYO ELECTRON LIMITED
    Inventors: Hirokazu Ueda, Yoshinobu Tanaka, Yusuke Ohsawa, Toshihisa Nozawa, Takaaki Matsuoka
  • Publication number: 20080311728
    Abstract: There is provided a damage recovery method capable of recovering electrical characteristics of a low dielectric insulating film sufficiently while suppressing oxidation of buried metal and generation of pattern defaults. A damaged functional group generated in a surface of the low dielectric insulating film by a processing is substituted with a hydrophobic functional group (ST. 2). A damaged component present under a dense layer generated in the surface of the low dielectric insulating film by the substitution process is recovered by using an ultraviolet heating process (ST. 3).
    Type: Application
    Filed: June 12, 2008
    Publication date: December 18, 2008
    Applicant: Tokyo Electron Limited
    Inventors: Ryuichi Asako, Yusuke Ohsawa