Patents by Inventor Kazuo Sunahara
Kazuo Sunahara 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: 8133836Abstract: To provide a process for producing ceria-zirconia solid solution crystal fine particles having high crystallinity, being excellent in uniformity of composition and particle size, having a small particle size and a high specific surface area and being excellent in heat resistance, and such solid solution crystal fine particles. A process comprises a step of obtaining a melt containing, as represented by mol % based on oxides, from 5 to 50% of (ZrO2+CeO2), from 10 to 60% of RO (wherein R is at least one member selected from the group consisting of Mg, Ca, Sr and Ba) and from 25 to 70% of B2O3, a step of quenching the melt to obtain an amorphous material, a step of heating the amorphous material at a temperature of from 550 to 1000° C.Type: GrantFiled: June 8, 2010Date of Patent: March 13, 2012Assignee: Asahi Glass Company, LimitedInventors: Yoshihisa Beppu, Kazuo Sunahara
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Patent number: 7994090Abstract: Provided is a process for readily producing fine particles of a solid solution having a small particle size, comprising a solid solution of zirconia, ceria and a rare earth oxide in a desired composition, and being highly crystalline. The process for producing the fine particles of the solid solution comprises the following steps in the order named: obtaining a melt comprising, in terms of mol % on an oxide basis, from 5 to 50% ZrO2, CeO2 and RE2O3 (where RE is at least one member selected from rare earth elements other than Ce) in total, from 10 to 50% RO (where R is at least one member selected from the group consisting of Mg, Ca, Sr, Ba and Zn), and from 30 to 75% B2O3; quenching the melt to obtain an amorphous material; heating the amorphous material to obtain precipitates containing crystals of a solid solution with ZrO2, CeO2 and RE2O3; and separating the crystals of the solid solution from the precipitates to obtain fine particles of the solid solution.Type: GrantFiled: July 21, 2009Date of Patent: August 9, 2011Assignee: Asahi Glass Company, LimitedInventors: Yoshihisa Beppu, Kazuo Sunahara
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Patent number: 7906732Abstract: Provided is a process for producing a glass plate with a conductive printed wire, which does not require a screen plate for each model, facilitates adjustments for desired heat generation performance or antenna performance, has an excellent adhesion to a glass plate surface, and minimizes surface roughness. The process for producing a glass plate with a conductive printed wire is characterized in that a laminate comprising a layer obtained by electro printing a first conductive toner having a number standard average particle size (D50) of 10 ?m<D50?50 ?m and a layer obtained by electro printing a second conductive toner having a particle size (D50) of 5 ?m?D50?10 ?m is formed on a surface of a glass plate and the glass plate is heated to fire the toners to thereby form a conductive printed wire having a predetermined pattern on the surface of the glass plate.Type: GrantFiled: November 28, 2008Date of Patent: March 15, 2011Assignee: Asahi Glass Company, LimitedInventors: Naoki Okahata, Satoshi Kashiwabara, Kazuo Sunahara, Tomoaki Okada, Katsuhiko Takeda
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Patent number: 7892715Abstract: A color toner for electro printing, which comprises from 10 to 50 parts by mass of fine inorganic pigment particles, from 5 to 40 parts by mass of a heat decomposable binder resin having an acid value of at least 5, and from 40 to 85 parts by mass of glass frit, per 100 parts by mass of the total solid content of the toner.Type: GrantFiled: September 29, 2006Date of Patent: February 22, 2011Assignee: Asahi Glass Company, LimitedInventors: Naoki Okahata, Satoshi Kashiwabara, Kazuo Sunahara
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Patent number: 7857680Abstract: A method for producing a glass substrate for a magnetic disk by polishing a circular glass plate, which comprises a step of polishing the principal plane of the circular glass plate by using a slurry containing a CeO2 crystal powder, the CeO2 crystal powder being obtained in such a manner that a melt containing CeO2 is quenched to obtain an amorphous material, and the amorphous material is subjected to heat treatment to obtain a CeO2 crystals-precipitated amorphous material, which is subjected to acid treatment to separate and extract the CeO2 crystal powder from the CeO2 crystals-precipitated amorphous material.Type: GrantFiled: April 25, 2007Date of Patent: December 28, 2010Assignee: Asahi Glass Company, LimitedInventors: Katsuaki Miyatani, Osamu Miyahara, Yuzuru Tanabe, Hiroshi Usui, Yoshihisa Beppu, Kazuo Sunahara, Mitsuru Horie, Satoshi Kashiwabara, Tomohiro Sakai, Yoshinori Kon, Iori Yoshida
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Publication number: 20100298127Abstract: To provide a process for producing ceria-zirconia solid solution crystal fine particles having high crystallinity, being excellent in uniformity of composition and particle size, having a small particle size and a high specific surface area and being excellent in heat resistance, and such solid solution crystal fine particles. A process comprises a step of obtaining a melt containing, as represented by mol % based on oxides, from 5 to 50% of (ZrO2+CeO2), from 10 to 60% of RO (wherein R is at least one member selected from the group consisting of Mg, Ca, Sr and Ba) and from 25 to 70% of B2O3, a step of quenching the melt to obtain an amorphous material, a step of heating the amorphous material at a temperature of from 550 to 1000° C.Type: ApplicationFiled: June 8, 2010Publication date: November 25, 2010Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Yoshihisa Beppu, Kazuo Sunahara
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Patent number: 7771831Abstract: An infrared shielding film-coated glass plate comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises fine ITO particles having an average primary particle diameter of at most 100 nm dispersed in a matrix containing silicon oxide as the main component and containing nitrogen in an amount of at least 2 at % based on Si and has a film thickness of from 200 to 3,000 nm.Type: GrantFiled: April 3, 2007Date of Patent: August 10, 2010Assignee: Asahi Glass Company, LimitedInventors: Hirokazu Kodaira, Hiroyuki Tomonaga, Kazuo Sunahara, Yuichi Yamamoto, Daisuke Kobayashi
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Patent number: 7754405Abstract: Toners having toner matrix particles having conductive fine particles, a heat decomposable binder resin and glass frit, and heat decomposable organic resin fine particles attached on the surface of the toner matrix particles. The heat decomposition temperature of the organic resin in the heat decomposable organic resin fine particles is lower than the heat decomposition temperature of the heat decomposable binder resin.Type: GrantFiled: December 28, 2006Date of Patent: July 13, 2010Assignee: Asahi Glass Company, LimitedInventors: Satoshi Kashiwabara, Kazuo Sunahara, Naoki Okahata
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Patent number: 7704660Abstract: To provide a process for producing a glass plate having an electric conductor pattern excellent in adhesion to the surface of the glass plate, whereby it is not required to have a screen ready for every model and adjustment to desired electric heating performance and antenna performance is easy, and a developer therefor. A developer for electronic printing, characterized in that the ratio of Ftc/Ftp is at least 2.5, where Ftc is the adhesive force acting between one toner particle containing conductive fine particles and one carrier, and Ftp is the adhesive force acting between one toner particle containing conductive fine particles and a photoconductor.Type: GrantFiled: January 5, 2007Date of Patent: April 27, 2010Assignee: Asahi Glass Company, LimitedInventors: Satoshi Kashiwabara, Naoki Okahata, Kazuo Sunahara
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Publication number: 20100022387Abstract: Provided is a process for readily producing fine particles of a solid solution having a small particle size, comprising a solid solution of zirconia, ceria and a rare earth oxide in a desired composition, and being highly crystalline. The process for producing the fine particles of the solid solution comprises the following steps in the order named: obtaining a melt comprising, in terms of mol % on an oxide basis, from 5 to 50% ZrO2, CeO2 and RE2O3 (where RE is at least one member selected from rare earth elements other than Ce) in total, from 10 to 50% RO (where R is at least one member selected from the group consisting of Mg, Ca, Sr, Ba and Zn), and from 30 to 75% B2O3; quenching the melt to obtain an amorphous material; heating the amorphous material to obtain precipitates containing crystals of a solid solution with ZrO2, CeO2 and RE2O3; and separating the crystals of the solid solution from the precipitates to obtain fine particles of the solid solution.Type: ApplicationFiled: July 21, 2009Publication date: January 28, 2010Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Yoshihisa Beppu, Kazuo Sunahara
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Publication number: 20090113809Abstract: To provide a slurry for polishing which is excellent in polishing properties, can suppress scratches and is appropriate for accurate polishing in semiconductor production steps, and fine particles of oxide crystal for it. Fine particles of oxide crystal, characterized in that the ratio of the crystallite size measured by X-ray diffraction method and calculated by Scherrer method to the average primary particle size equivalent to sphere from the specific surface area measured by BET is the crystallite size: the average primary particle size=1:0.8 to 1:2.5. A slurry for polishing, characterized in that the fine particles of oxide crystal are dispersed in a liquid medium, and from 0.1 to 40 mass % of the fine particles of oxide crystal are contained, per the total mass of the slurry for polishing.Type: ApplicationFiled: October 24, 2008Publication date: May 7, 2009Applicant: Asahi Glass Company, LimitedInventors: Tomohiro Sakai, Yoshihisa Beppu, Kazuo Sunahara
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Publication number: 20090095512Abstract: Provided is a process for producing a glass plate with a conductive printed wire, which does not require a screen plate for each model, facilitates adjustments for desired heat generation performance or antenna performance, has an excellent adhesion to a glass plate surface, and minimizes surface roughness. The process for producing a glass plate with a conductive printed wire is characterized in that a laminate comprising a layer obtained by electro printing a first conductive toner having a number standard average particle size (D50) of 10 ?m<D50?50 ?m and a layer obtained by electro printing a second conductive toner having a particle size (D50) of 5 ?m?D50?10 ?m is formed on a surface of a glass plate and the glass plate is heated to fire the toners to thereby form a conductive printed wire having a predetermined pattern on the surface of the glass plate.Type: ApplicationFiled: November 28, 2008Publication date: April 16, 2009Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Naoki OKAHATA, Satoshi Kashiwabara, Kazuo Sunahara, Tomoaki Okada, Katsuhiko Takeda
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Publication number: 20080254268Abstract: A color toner for electro printing, whereby a ceramic color print excellent in adhesion can be printed on a glass plate surface by a simple process without using a screen plate. The color toner for electro printing comprises toner matrix particles containing from 10 to 50 parts by mass of fine inorganic pigment particles, from 5 to 40 parts by mass of a heat decomposable binder resin having a disappearance temperature T100 of from 350 to 575° C., and from 40 to 85 parts by mass of glass frit, per 100 parts by mass of the total solid content of the toner matrix particles.Type: ApplicationFiled: April 2, 2008Publication date: October 16, 2008Applicant: ASAHI GLASS COMPANY LIMITEDInventors: Naoki Okahata, Satoshi Kashiwabara, Kazuo Sunahara
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Patent number: 7381232Abstract: To provide a process for producing CeO2 fine particles having high crystallinity, being excellent in uniformity of composition and particle size and having a small particle size, and a polishing slurry containing such fine particles. A process for producing CeO2 fine particles, which comprises a step of obtaining a melt containing, as represented by mol % based on oxides, from 5 to 50% of CeO2, from 10 to 50% of RO (wherein R is at least one member selected from the group consisting of Mg, Ca, Sr and Ba) and from 30 to 75% of B2O3, a step of quenching the melt to obtain an amorphous material, a step of precipitating CeO2 crystals from the amorphous material, and a step of separating the CeO2 crystals from the obtained crystallized product, in this order. A polishing slurry containing from 0.1 to 20 mass % of such fine particles.Type: GrantFiled: May 7, 2007Date of Patent: June 3, 2008Assignee: Asahi Glass Company, LimitedInventors: Yoshihisa Beppu, Tomohiro Sakai, Satoshi Kashiwabara, Kazuo Sunahara
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Publication number: 20080090073Abstract: To provide an infrared shielding layer-coated glass plate excellent in visible light transmittance and radiowave transmittance, having a low infrared transmittance, and applicable to a site where mechanical durability is required, such as a window glass plate for an automobile, and its production process. An infrared shielding layer-coated glass plate comprising a glass substrate and an infrared shielding layer having the following first layer and the following second layer adjacent to each other formed on the glass substrate (provided that the first layer is present on the glass substrate side), wherein the first layer is a layer with a thickness of from 0.2 to 2 ?m, having such a structure that fine ITO particles with an average primary particle diameter of at most 100 nm are bound to one another by a metal oxide matrix containing silicon oxide and titanium oxide; and the second layer is a metal oxide layer with a thickness of from 0.02 to 0.3 ?m, containing silicon oxide and titanium oxide.Type: ApplicationFiled: October 15, 2007Publication date: April 17, 2008Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Hiroyuki TOMONAGA, Hirokazu Kodaira, Kazuo Sunahara
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Publication number: 20080020134Abstract: An infrared shielding film-coated glass comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises a first film layer formed in a thickness of from 0.2 to 2 ?m on the surface of the glass substrate and having transparent electroconductive oxide fine particles having an average primary particle diameter of at most 100 nm dispersed in a silicon oxide matrix in a mass ratio of transparent electroconductive oxide fine particles/silicon oxide=10/0.5 to 10/20, and a second film layer laminated in a thickness of from 0.02 to 0.2 ?m on the first film layer and comprising silicon oxide, silicon oxynitride or silicon nitride, and the increase in haze by abrasion after a 1000 rotation test by a CS-10F abrasive wheel in accordance with the abrasion resistance test stipulated in JIS R3212 (1998) is at most 5%.Type: ApplicationFiled: September 24, 2007Publication date: January 24, 2008Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Hiroyuki TOMONAGA, Kazuo Sunahara
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Publication number: 20070292695Abstract: An infrared shielding film-coated glass plate comprising a glass substrate and an infrared shielding film formed thereon, wherein the infrared shielding film comprises fine ITO particles having an average primary particle diameter of at most 100 nm dispersed in a matrix containing silicon oxide as the main component and containing nitrogen in an amount of at least 2 at % based on Si and has a film thickness of from 200 to 3,000 nm.Type: ApplicationFiled: April 3, 2007Publication date: December 20, 2007Applicant: Asahi Glass Company, LimitedInventors: Hirokazu KODAIRA, Hiroyuki TOMONAGA, Kazuo SUNAHARA, Yuichi YAMAMOTO, Daisuke KOBAYASHI
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Patent number: 7306779Abstract: A composite oxide suitable for an active material of a positive electrode for a lithium secondary cell which can be used in a wide range of voltage, has a large electric capacity and excellent low temperature performance and is excellent in the durability for charge-discharge cycles and highly safe, a process for its production, and a positive electrode and a cell employing it, are presented. The composite oxide is a lithium-cobalt composite oxide which is represented by the formula LiCo1-xMxO2, (wherein 0?x?0.02 and M is at least one member selected from the group consisting of Ta, Ti, Nb, Zr and Hf), and which has a half-width of the diffraction peak for (110) face at 2?=66.5±1°, of from 0.070 to 0.180°, as measured by the X-ray diffraction using CuK? as a ray source.Type: GrantFiled: December 23, 2003Date of Patent: December 11, 2007Assignee: Seimi Chemical Co., Ltd.Inventors: Manabu Suhara, Kazuo Sunahara, Naoshi Saitoh, Tsutomu Katoh
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Publication number: 20070273269Abstract: A display panel has an evacuation port at one side thereof, and the opening area of the evacuation port increases toward the periphery of the display panel. The display panel also has a frame member in the opening, and the height of the frame member lowers toward the inside of the display panel. According to the invention, by improving the evacuation efficiency in the airtight container and improving the vacuum level in the display panel in a short period of time, the electron emission characteristic is stabilized and the lifetime thereof is increased, allowing a high-quality, reliable image display to be provided.Type: ApplicationFiled: March 15, 2007Publication date: November 29, 2007Inventors: Yuichi Sukigara, Kazuo Sunahara, Yuuichi Kijima
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Patent number: 7300806Abstract: It is an object to provide fine particles of bismuth titanate having excellent dielectric characteristics, high crystallinity and a small particle diameter, and a process for their production. The object is accomplished by a process which comprises a step of obtaining a melt comprising, as represented by mol % based on oxides, from 23 to 72% of Bi2O3, from 4 to 64% of TiO2 and from 6 to 50% of B2O3, a step of quickly quenching this melt to obtain an amorphous material, a step of crystallization of bismuth titanate crystals from the above amorphous material, and a step of separating the bismuth titanate crystals from the obtained crystallized material, in this order.Type: GrantFiled: September 13, 2005Date of Patent: November 27, 2007Assignee: Asahi Glass Company, LimitedInventors: Yoshihisa Beppu, Kazuo Sunahara, Hiroyuki Tomonaga, Kumiko Takahashi