Patents by Inventor Toshio Kawata
Toshio Kawata 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).
-
Publication number: 20140094490Abstract: The present invention has an object to provide a novel agent for anti-neurodegenerative diseases and solves the object by providing an agent for anti-neurodegenerative diseases containing, as an effective ingredient, the compound(s) represented by the following General formula 1: wherein in General formula 1, R1 through R3 independently represent a hydrogen atom or an appropriate substituent; Z1 represents a heterocyclic ring and Z2 represents the same or different heterocyclic or aromatic ring as in Z1, wherein the heterocyclic and aromatic rings optionally have a substituent; o represents an integer of 0, 1 or 2; p represents an integer of 0 or 1, with the proviso that p is 1 when o is 0 or 2, and p is 0 when o is 1; R1 and R2 do not exist when o is 0, while, when p is 0, R3 does not exist and the binding between the carbon atom to which R2 binds and Z2 is a single bond; X1? represents an appropriate counter anion and q represents an integer of 1 or 2.Type: ApplicationFiled: December 5, 2013Publication date: April 3, 2014Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Hitomi OHTA, Kenji AKITA, Tsunetaka OHTA, Toshio KAWATA, Shigeharu FUKUDA
-
Publication number: 20120035187Abstract: The present invention has an object to provide a novel agent for anti-neurodegenerative diseases and solves the object by providing an agent for anti-neurodegenerative diseases containing, as an effective ingredient, the compound(s) represented by the following General formula 1: wherein in General formula 1, R1 through R3 independently represent a hydrogen atom or an appropriate substituent; Z1 represents a heterocyclic ring and Z2 represents the same or different heterocyclic or aromatic ring as in Z1, wherein the heterocyclic and aromatic rings optionally have a substituent; represents an integer of 0, 1 or 2; p represents an integer of 0 or 1, with the proviso that p is 1 when o is 0 or 2, and p is 0 when o is 1; R1 and R2 do not exist when o is 0, while, when p is 0, R3 does not exist and the binding between the carbon atom to which R2 binds and Z2 is a single bond; X1? represents an appropriate counter anion and q represents an integer of 1 or 2.Type: ApplicationFiled: January 25, 2010Publication date: February 9, 2012Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Hitomi Ohta, Kenji Akita, Tsunetaka Ohta, Toshio Kawata, Shigeharu Fukuda
-
Patent number: 7402375Abstract: The present invention provides organic dye compounds having their absorption maxima in a region ranging from the ultraviolet region to a relatively short wavelength visible region and uses thereof. The present invention provides specific monomethine cyanine dyes, light absorbents and optical recording media comprising the monomethine cyanine dyes, and a process for producing the monomethine cyanine dyes which comprises a step of reacting a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having a reactive methyl group with a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having an appropriate leaving group.Type: GrantFiled: May 16, 2003Date of Patent: July 22, 2008Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Chiaki Kasada, Yasushi Aizawa, Toshio Kawata, Shigeo Yasui
-
Patent number: 7354694Abstract: The present invention provides styryl dyes which have absorption maxima at a wavelength of 400 nm or less and are sensitive to a laser beam with a wavelength of 450 nm or less, light absorbents and optical recording media which comprise the styryl dyes, and a process for producing the styryl dyes which comprises reacting with an aldehyde compound a quaternary ammonium salt of nitrogen atom containing heterocyclic compound having an active methyl or active methylene group.Type: GrantFiled: November 24, 2000Date of Patent: April 8, 2008Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyukoInventors: Chiaki Kasada, Toshio Kawata, Kentaro Yano, Shigeo Yasui
-
Publication number: 20050240019Abstract: The present invention provides styryl dyes which have absorption maxima at a wavelength of 400 nm or less and are sensitive to a laser beam with a wavelength of 450 nm or less, light absorbents and optical recording media which comprise the styryl dyes, and a process for producing the styryl dyes which comprises reacting with an aldehyde compound a quaternary ammonium salt of nitrogen atom containing heterocyclic compound having an active methyl or active methylene group.Type: ApplicationFiled: April 11, 2005Publication date: October 27, 2005Applicant: KABAYUSHI KAISHI HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Chiaki Kasada, Toshio Kawata, Kentaro Yano, Shigeo Yasui
-
Publication number: 20040161701Abstract: Disclosed are novel trimethine cyanine dyes, light absorbents, light-resistant improvers, and optical recording media which comprise the trimethine cyanine dyes. The cyanine dyes exert satisfactory solubility and heat resistance when used in high-density optical recording media.Type: ApplicationFiled: February 5, 2004Publication date: August 19, 2004Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENYUJOInventors: Ayako Hohsaka, Dai Matsuura, Toshio Kawata, Shigeo Yasui
-
Patent number: 6743568Abstract: Optical recording media using mixtures of benzoindolenic trimethine cyanine dyes, where the first benzoindolenic trimethine cyanine dye bears a heterocyclic azo dye metal complex as the counterion and the second benzoindolenic trimethine cyanine dye has a different type of counterion. This combination of these benzoindolenic trimethine cyanine dyes coated on a substrate results in high density media, where the dyes have a high solubility and heat resistance.Type: GrantFiled: February 12, 2001Date of Patent: June 1, 2004Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Ayako Hohsaka, Dai Matsuura, Toshio Kawata, Shigeo Yasui
-
Patent number: 6683188Abstract: The present invention provides organic dye compounds having their absorption maxima in a region ranging from the ultraviolet region to a relatively short wavelength visible region and uses thereof. The present invention provides specific monomethine cyanine dyes, light absorbents and optical recording media comprising the monomethine cyanine dyes, and a process for producing the monomethine cyanine dyes which comprises a step of reacting a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having a reactive methyl group with a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having an appropriate leaving group.Type: GrantFiled: August 17, 2001Date of Patent: January 27, 2004Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Chiaki Kasada, Yasushi Aizawa, Toshio Kawata, Shigeo Yasui
-
Patent number: 6645594Abstract: The present invention provides organic compounds which improve the light resistance of organic dye compounds without substantially deteriorating their preferable light properties when applied to them, and have satisfactory solubility in organic solvents and compatibility with organic dye compounds.Type: GrantFiled: February 8, 2001Date of Patent: November 11, 2003Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Kentaro Yano, Katsumi Orita, Toshio Kawata, Shigeo Yasui
-
Publication number: 20030181727Abstract: The present invention provides organic dye compounds having their absorption maxima in a region ranging from the ultraviolet region to a relatively short wavelength visible region and uses thereof. The present invention provides specific monomethine cyanine dyes, light absorbents and optical recording media comprising the monomethine cyanine dyes, and a process for producing the monomethine cyanine dyes which comprises a step of reacting a quaternary ammonium salt of nitrogen atom-containing heterocyclic compound having a reactive methyl group with a quarternary ammonium salt of nitrogen atom-containing heterocyclic compound having an appropriate leaving group.Type: ApplicationFiled: May 16, 2003Publication date: September 25, 2003Applicant: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyInventors: Chiaki Kasada, Yasushi Aizawa, Toshio Kawata, Shigeo Yasui
-
Publication number: 20030064322Abstract: The object of the present invention is to provide light absorbents which exert superior electrical properties in organic optical recording media and to uses thereof, and is solved by providing light absorbents comprising the first polymethine dye having an organic metal complex anion as a counter ion and a monomethine or polymethine chain intramolecularly, the second polymethine dye having an anion, as a counter ion, other than organic metal complex anions and a monomethine or polymethine chain intramolecularly, and a formazane metal complex; optical recording media which use the light absorbents; and a process for producing optical recording media which comprise a step of forming a homogeneous thin layer comprising the light absorbents on a substrate.Type: ApplicationFiled: August 27, 2002Publication date: April 3, 2003Inventors: Yoshinori Koyama, Yasushi Aizawa, Toshio Kawata, Shigeo Yasui
-
Patent number: 6525181Abstract: The object of the present invention is to provide organic dye compounds which exert satisfactory optical absorption properties and thermal resistance when used in high density optical recording media. The above object is solved by specific trimethine cyanine dyes, light absorbents and optical recording media which comprise the cyanine dyes, and preparations for the cyanine dyes comprising either reacting a benzoindolium compound having a compatible leaving group with a pyrazinoimidazolium compound having a reactive methyl group; or reacting a benzoindolium compound having a reactive methyl group with a pyrazinoimidazolium compound having a compatible leaving group.Type: GrantFiled: October 23, 2001Date of Patent: February 25, 2003Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Chiaki Kasada, Katsumi Orita, Kentaro Yano, Toshio Kawata, Shigeo Yasui
-
Publication number: 20020178517Abstract: The object of the present invention is to provide organic dye compounds which exert satisfactory optical absorption properties and thermal resistance when used in high density optical recording media. The above object is solved by specific trimethine cyanine dyes, light absorbents and optical recording media which comprise the cyanine dyes, and preparations for the cyanine dyes comprising either reacting a benzoindolium compound having a compatible leaving group with a pyrazinoimidazolium compound having a reactive methyl group; or reacting a benzoindolium compound having a reactive methyl group with a pyrazinoimidazolium compound having a compatible leaving group.Type: ApplicationFiled: October 23, 2001Publication date: December 5, 2002Inventors: Chiaki Kasada, Katsumi Orita, Kentaro Yano, Toshio Kawata, Shigeo Yasui
-
Patent number: 6413607Abstract: The present invention provides organic dye compounds which exert excellent recording characteristics in high-density optical recording media, and uses thereof. The present invention solves the objects of the present invention by providing non-symmetric trimethine cyanine dyes having a specific structure and properties, light absorbents and optical recording media comprising the cyanine dyes, and a process for preparing the cyanine dye comprising a step of reacting either 3,3-dimethyl-5-nitroindolium compounds or 3,3-dimethyl-5-sulfonamideindolium compounds, which have a reactive methyl group or an appropriate leaving group, with 3,3-dimethylbezoindolium compounds, which have a reactive methyl group or an appropriate leaving group.Type: GrantFiled: December 5, 2000Date of Patent: July 2, 2002Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku KenkyujoInventors: Chiaki Kasada, Yoshie Hata, Toshio Kawata, Shigeo Yasui
-
Publication number: 20020028918Abstract: Disclosed are novel styryl dyes, and light absorbents, light-resistant improvers, and optical recording media, which comprise the styryl dyes. The styryl dyes exert satisfactory solubilities and relatively-high light resistance when used in high-density optical recording media.Type: ApplicationFiled: July 5, 2001Publication date: March 7, 2002Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJOInventors: Chiaki Kasada, Yoshinori Koyama, Toshio Kawata, Shigeo Yasui
-
Publication number: 20010044074Abstract: Disclosed are novel trimethine cyanine dyes, light absorbents, light-resistant improvers, and optical recording media which comprise the trimethine cyanine dyes. The cyanine dyes exert satisfactory solubility and heat resistance when used in high-density optical recording media.Type: ApplicationFiled: February 12, 2001Publication date: November 22, 2001Inventors: Ayako Hohsaka, Dai Matsuura, Toshio kawata, Shigeo Yasui