Patents by Inventor Takayoshi Kawasaki
Takayoshi Kawasaki 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).
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Patent number: 11041120Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.Type: GrantFiled: September 17, 2019Date of Patent: June 22, 2021Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Naoki Otani, Masahiro Ueda, Takayoshi Kawasaki
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Publication number: 20210155736Abstract: The present invention relates to a urethane resin obtained by reacting a polymerizable composition containing at least a urethane prepolymer (B2) having an iso(thio)cyanate group at an end of a molecule thereof, which is obtained by reacting a bifunctional active hydrogen-containing compound (C1) having two groups having active hydrogen in a molecule thereof and a bifunctional iso(thio)cyanate group-containing compound (B1) having two iso(thio)cyanate groups in a molecule thereof, a polyrotaxane (A) having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, in which side chains having a group having active hydrogen are introduced into at least a part of the cyclic molecules, and a polyfunctional active hydrogen-containing compound (C2) other than the polyrotaxane (A) and having three or more groups having active hydrogen in a molecule thereof.Type: ApplicationFiled: April 8, 2019Publication date: May 27, 2021Applicant: TOKUYAMA CORPORATIONInventors: Yasutomo SHIMIZU, Takayoshi KAWASAKI, Mitsuki TOCHI
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Publication number: 20210122874Abstract: The invention is a polyrotaxane monomer (A) having a composite molecular structure composed of cyclic molecules and an axial molecule that skewer-like threads through the rings of the cyclic molecules and has a bulky group at both ends thereof so as not to dethread the rings, and the polyrotaxane monomer has a polymerizable functional group in the molecule and has a water content of 5000 ppm or less. According to the present invention, there can be provided a polyrotaxane monomer having a high productivity and capable of producing a high-quality material at a high yield, while maintaining excellent mechanical characteristics of the polyrotaxane monomer.Type: ApplicationFiled: May 16, 2019Publication date: April 29, 2021Applicant: TOKUYAMA CORPORATIONInventors: Yasutomo SHIMIZU, Takayoshi KAWASAKI, Mitsuki TOCHI
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Publication number: 20210070790Abstract: A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.Type: ApplicationFiled: March 14, 2019Publication date: March 11, 2021Applicant: TOKUYAMA CORPORATIONInventors: Takayoshi KAWASAKI, Junji MOMODA, Tomohiro KAWAMURA, Mayumi KISHI, Michihito NAKATANI
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Patent number: 10920007Abstract: To provide a urethane resin for sliding members which has high abrasion resistance and is considered that crosslinking points are uniformly dispersed so that molecular motion is suitably possible. Particularly, to provide the urethane resin can be advantageously used as a polishing pad. There is provided the urethane resin for polishing is obtained by polymerizing a polymerizable composition comprising (A) a polyrotaxane having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule and side chains having an active hydrogen group introduced into at least some of the cyclic molecules and (B) a polyiso(thio)cyanate compound.Type: GrantFiled: November 16, 2017Date of Patent: February 16, 2021Assignee: TOKUYAMA CORPORATIONInventors: Yasutomo Shimizu, Takayoshi Kawasaki, Junji Momoda, Mitsuki Tochi
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Patent number: 10767109Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.Type: GrantFiled: February 2, 2016Date of Patent: September 8, 2020Assignee: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki Isaji, Naoki Otani, Masahiro Ueda, Takayoshi Kawasaki
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Publication number: 20200172681Abstract: A photochromic polyrotaxane compound which comprises an axial molecule and a plurality of cyclic molecules clathrating the axial molecule, wherein at least one side chain containing a photochromic moiety is bonded to at least one of the cyclic molecules, and a curable composition comprising the photochromic polyrotaxane compound and a polymerizable compound.Type: ApplicationFiled: June 18, 2018Publication date: June 4, 2020Applicant: TOKUYAMA CORPORATIONInventors: Junji TAKENAKA, Junji MOMODA, Takayoshi KAWASAKI, Takao NOGUCHI, Yasutomo SHIMIZU, Masayuki MIYAZAKI
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Publication number: 20200024511Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.Type: ApplicationFiled: September 17, 2019Publication date: January 23, 2020Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Naoki OTANI, Masahiro UEDA, Takayoshi KAWASAKI
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Publication number: 20190263961Abstract: To provide a urethane resin for sliding members which has high abrasion resistance and is considered that crosslinking points are uniformly dispersed so that molecular motion is suitably possible. Particularly, to provide the urethane resin can be advantageously used as a polishing pad. There is provided the urethane resin for polishing is obtained by polymerizing a polymerizable composition comprising (A) a polyrotaxane having a composite molecular structure formed by an axial molecule and a plurality of cyclic molecules clathrating the axial molecule and side chains having an active hydrogen group introduced into at least some of the cyclic molecules and (B) a polyiso(thio)cyanate compound.Type: ApplicationFiled: November 16, 2017Publication date: August 29, 2019Applicant: TOKUYAMA CORPORATIONInventors: Yasutomo SHIMIZU, Takayoshi KAWASAKI, Junji MOMODA, Mitsuki TOCHI
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Publication number: 20190055466Abstract: Provided is a production method for a carbon-based light-emitting material that generates light having a wavelength of 500 to 700 nm when exposed to excitation light having a wavelength of 300 to 600 nm. The production method comprises a step for mixing and heating a starting material containing ascorbic acid, an acid catalyst containing an inorganic acid, and a solvent.Type: ApplicationFiled: January 25, 2017Publication date: February 21, 2019Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Naoki OTANI, Shinichi MAEDA, Masahiro UEDA, Takayoshi KAWASAKI
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Patent number: 9939371Abstract: A detection system for detecting analytes in a sample, and methods of making and using the detection system, are disclosed. The detection system includes at least one sensor having a substrate and an optical interference layer on the substrate. The optical interference layer includes a plurality of sample segments, wherein two or more of the plurality of sample segments are configured to have different affinities to two or more analytes in the sample. The detection system further includes at least one light source configured to illuminate the two or more of the plurality of sample segments, and at least one image detector configured to detect an interference spectrum from each of the two or more of the plurality of sample segments illuminated by the light source, thereby detecting the two or more analytes in the sample.Type: GrantFiled: February 1, 2016Date of Patent: April 10, 2018Assignee: EMPIRE TECHNOLOGY DEVELOPMENT LLCInventor: Takayoshi Kawasaki
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Publication number: 20180022994Abstract: Provided is a method for manufacturing a carbonaceous luminescent material in which a polycarboxylic-acid-containing starting material, an acid catalyst, and a solvent are mixed together and heated.Type: ApplicationFiled: February 2, 2016Publication date: January 25, 2018Applicant: NISSAN CHEMICAL INDUSTRIES, LTD.Inventors: Tadayuki ISAJI, Naoki OTANI, Masahiro UEDA, Takayoshi KAWASAKI
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Publication number: 20170219483Abstract: A detection system for detecting analytes in a sample, and methods of making and using the detection system, are disclosed. The detection system includes at least one sensor having a substrate and an optical interference layer on the substrate. The optical interference layer includes a plurality of sample segments, wherein two or more of the plurality of sample segments are configured to have different affinities to two or more analytes in the sample. The detection system further includes at least one light source configured to illuminate the two or more of the plurality of sample segments, and at least one image detector configured to detect an interference spectrum from each of the two or more of the plurality of sample segments illuminated by the light source, thereby detecting the two or more analytes in the sample.Type: ApplicationFiled: February 1, 2016Publication date: August 3, 2017Inventor: Takayoshi KAWASAKI
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Patent number: 8529789Abstract: A photochromic cured product exhibiting favorable photochromic properties such as a high color density and a large fading rate, and excellent base member properties such as a high hardness, a high heat resistance and a high impact resistance. A curable composition contains a polymerizable monomer which exhibits the L-scale Rockwell hardness of not larger than 40, a bifunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, a polyfunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, and a photochromic compound.Type: GrantFiled: July 1, 2005Date of Patent: September 10, 2013Assignee: Tokuyama CorporationInventors: Junji Momoda, Takayoshi Kawasaki, Toshiaki Ohtani
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Publication number: 20130063717Abstract: The present invention provides a laminated structure for measuring reflected light intensity able to measure the thickness of a surface adsorbed film with high sensitivity by a simple optical technique. Provided are a laminated structure for measuring reflected light intensity at at least one wavelength that comprises a valve metal optical interference layer, and a method for measuring film thickness and/or mass and/or viscosity of a thin film targeted for measurement by radiating light onto the thin film targeted for measurement and measuring a change in reflected light intensity at at least one wavelength in a measurement medium in this laminated structure for measuring reflected light intensity.Type: ApplicationFiled: March 10, 2011Publication date: March 14, 2013Applicant: TOKYO INSTITUTE TECHNOLOGYInventors: Takayoshi Kawasaki, Yoshio Okahata
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Patent number: 7087195Abstract: There is provided a method of preventing decreases in the developed color density and color fading speed of an organic photochromic compound without lowering the mechanical and optical physical properties such as hardness of a cured product when the cured product which has the organic photochromic compound dispersed in a polymer matrix is obtained. A photochromic cured product is obtained by curing a photochromic curable composition which comprises a polymerizable monomer having a biphenyl skeleton such as p-phenylphenyl methacrylate, a multifunctional polymerizable monomer having no biphenyl skeleton such as a mixture of trimethylolpropane trimethacrylate and triethylene glycol dimethacrylate, and an organic photochromic compound.Type: GrantFiled: November 28, 2001Date of Patent: August 8, 2006Assignee: Tokuyama CorporationInventor: Takayoshi Kawasaki
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Publication number: 20050263745Abstract: A photochromic cured product exhibiting favorable photochromic properties such as a high color density and a large fading rate, and excellent base member properties such as a high hardness, a high heat resistance and a high impact resistance. A curable composition contains a polymerizable monomer which exhibits the L-scale Rockwell hardness of not larger than 40, a bifunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, a polyfunctional polymerizable monomer which exhibits the L-scale Rockwell hardness of not smaller than 60, and a photochromic compound.Type: ApplicationFiled: July 1, 2005Publication date: December 1, 2005Inventors: Junji Momoda, Takayoshi Kawasaki, Toshiaki Ohtani
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Publication number: 20040046156Abstract: There is provided a method of preventing decreases in the developed color density and color fading speed of an organic photochromic compound without lowering the mechanical and optical physical properties such as hardness of a cured product when the cured product which has the organic photochromic compound dispersed in a polymer matrix is obtained. A photochromic cured product is obtained by curing a photochromic curable composition which comprises a polymerizable monomer having a biphenyl skeleton such as p-phenylphenyl methacrylate, a multifunctional polymerizable monomer having no biphenyl skeleton such as a mixture of trimethylolpropane trimethacrylate and triethylene glycol dimethacrylate, and an organic photochromic compound.Type: ApplicationFiled: June 12, 2003Publication date: March 11, 2004Inventor: Takayoshi Kawasaki
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Patent number: 5438021Abstract: A multiple-chip semiconductor device of the present invention comprises a first and a second leadframes. The same package envelops a power semiconductor chip mounted on a power chip mounting area in the first leadframe and a control chip mounted on a control chip mounting area in the second leadframe. In the device, the second leadframe is made of metal material which is processed easier than the first leadframe, and/or is finished thinner than the first leadframe. Thus, the multiple-chip semiconductor device can effectively dissipate the heat producing in the power semiconductor chip.Type: GrantFiled: March 21, 1994Date of Patent: August 1, 1995Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Tomohide Tagawa, Takashi Takahashi, Takayoshi Kawasaki