Patents by Inventor Kazutaka Hayashi
Kazutaka Hayashi 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: 6977232Abstract: Provided is an optical glass that has high-refractivity and high-dispersion properties and can give preforms for press-molding, which are excellent in shapability at high temperatures and suitable for precision press-molding. The optical contains, as essential components, 25 to 45 mol % of B2O3, 2 to 20 mol % of SiO2, 5 to 22 mol % of La2O3, 2 to 20 mol % of Gd2O3, 15 to 29 mol % of ZnO, 1 to 10 mol % of Li2O and 0.5 to 8 mol % of ZrO2, the optical glass having a B2O3/SiO2 molar ratio of from 2 to 5.5 and having an La2O3 and Gd2O3 total content of 12 to 24 mol % and a ZnO and Li2O total content of 25 to 30 mol %, the optical glass having a refractive index (nd) of 1.75 to 1.85 and an Abbe's number (?d) of 40 to 55, or the optical glass contains, as essential components, B2O3, SiO2, La2O3, Gd2O3, ZnO, Li2O and ZrO2 and has a viscosity of at least 6 dPa·s at a liquidus temperature thereof, a glass transition temperature (Tg) of 600° C. or lower, a refractive index (nd) of 1.75 to 1.Type: GrantFiled: October 16, 2002Date of Patent: December 20, 2005Assignee: Hoya CorporationInventors: Kazutaka Hayashi, Xuelu Zou
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Publication number: 20050223743Abstract: A process for highly productively mass-producing optical elements formed of a high-refractivity glass includes repeating the step of precision press-molding a glass preform formed of an optical glass having an Abbe's number (?d) of 30 to less than 40 and a refractive index (nd) of over 1.84 or an optical glass having an Abbe's number (?d) of 40 to 50 and a refractive index (nd) that satisfies the expression (1), nd>2.16?0.008×?d??(1) with a mold made from a material having heat durability against temperatures of higher than 650° C. to produce an optical element formed of said glass.Type: ApplicationFiled: April 12, 2005Publication date: October 13, 2005Inventor: Kazutaka Hayashi
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Publication number: 20050204776Abstract: Provided are optical glasses having a refractive index (nd) of over 1.82 but not more than 1.86 and an Abbe's number (?d) of 30 to 39.5 and having the property of low-temperature softening that permits precision press-molding, one is an optical glass comprising B2O3, La2O5, Gd2O3 and ZnO as essential components, comprising Li2O and SiO2 as optional components, provided that the content of SiO2 is less than 2% by weight when Li2O is contained, having a refractive index (nd) of over 1.82 but not more than 1.86 and an Abbe's number (?d) of 30 to 39.5 and having a glass transition temperature (Tg) of 630° C. or lower, and the other is an optical glass comprising, by % by weight, 14 to 30% of B2O3, 10 to 40% of La2O3, 1 to 30% of Gd2O3 and 6 to 26% of ZnO as essential components, and comprising, as optional components, predetermined amounts of WO3, Ta2O5, Nb2O5, TiO2, SiO2, Li2O, Na2O, K2O, MgO, CaO, SrO, BaO, Y2O3, Yb2O3, ZrO2, Bi2O3 and Sb2O3 and having a refractive index (nd) of over 1.82 but not more than 1.Type: ApplicationFiled: March 17, 2005Publication date: September 22, 2005Applicant: HOYA CORPORATIONInventor: Kazutaka Hayashi
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Publication number: 20050197243Abstract: Provided is an optical glass having high-refractivity low-dispersion properties, having a low glass transition temperature and having the property of being softened at a low temperature so that a preform therefrom is precision press-moldable, and the optical glass comprises, as essential components, B2O3, La2O3, Gd2O3 and ZnO and has a refractive index (nd) of over 1.86, an Abbe's number (?d) of less than 35 and a glass transition temperature (Tg) of 630° C. or lower.Type: ApplicationFiled: February 25, 2005Publication date: September 8, 2005Applicant: HOYA CORPORATIONInventor: Kazutaka Hayashi
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Publication number: 20050113240Abstract: A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd2O3 and ZnO as essential components, substantially containing none of lead and fluorine, having a refractive index (nd) of 1.72 to 1.83, an Abbe's number (?d) of 45 to 55 and a glass transition temperature (Tg) of 630° C. or lower and having a viscosity of at least 0.6 Pa·s at its liquidus temperature, and an optical glass comprising, by mol %, 45 to 65% of B2O3, 5 to 22% of La2O3, 1 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 14 to 30%, 5 to 30% of ZnO, 0 to 10% of SiO2, 0 to 6.5% of ZrO2 and 0 to 1% of Sb2O3, substantially containing none of lead and fluorine, and having a refractive index (nd) of 1.72 to 1.83 and an Abbe's number (?d) of 45 to 55.Type: ApplicationFiled: November 1, 2004Publication date: May 26, 2005Applicant: Hoya CorporationInventors: Kazutaka Hayashi, Yasuhiro Fujiwara, Zou Xuelu
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Publication number: 20050049135Abstract: Provided is a precision press-molding glass preform, which is formed of a high-refractivity low-dispersion optical glass containing no PbO and which requires none of cutting and polishing of an optical-function surface after the precision press-molding is carried out, the optical glass containing, by mol %, 40 to 60% of B2O3 exclusive of 40%, 5 to 25% of La2O3, 2 to 22% of Gd2O3, 5 to 45% of ZnO and 0 to 10% of SiO2 exclusive of 10% as glass components but containing no PbO, wherein the ratio of the content of B2O3 to the total content of B2O3 and SiO2 (B2O3/(B2O3+SiO2)) is over 0.84 but not more than 1.00, and the ratio of the content of Gd2O3 to the total content of Gd2O3 and Nb2O5 as an optional component (Gd2O3/(Gd2O3+Nb2O5)) is over 0.91 but not more than 1.00, the optical glass having a refractive index (nd) of over 1.80 but not more than 2.00 and an Abbe's number (?d) of 40 to 45 exclusive of 45.Type: ApplicationFiled: August 19, 2004Publication date: March 3, 2005Inventor: Kazutaka Hayashi
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Publication number: 20050011228Abstract: Provided are a process for the production of a precision press-molded article having a high transmittance and a method of treating a glass to color or decolor the glass, the process comprising heat-treating a press-molded article containing at least one selected from WO3, Nb2O5 or TiO2 in an oxidizing atmosphere to produce a glass molded article, and the method comprising heat-treating a colored glass containing at least one oxide of WO3 and Nb2O5 in an oxidizing atmosphere to decolor the glass, or heat-treating a glass containing at least one oxide selected from WO3, Nb2O5 or TiO2 in a non-oxidizing atmosphere to color the glass.Type: ApplicationFiled: July 16, 2004Publication date: January 20, 2005Applicant: Hoya CorporationInventors: Kazutaka Hayashi, Hiromasa Tawarayama, Xuelu Zou, Hiroshi Kawazoe
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Patent number: 6844279Abstract: A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd2O3 and ZnO as essential components, substantially containing none of lead and fluorine, having a refractive index (nd) of 1.72 to 1.83, an Abbe's number (?d) of 45 to 55 and a glass transition temperature (Tg) of 630° C. or lower and having a viscosity of at least 0.6 Pa·s at its liquidus temperature, and an optical glass comprising, by mol %, 45 to 65% of B2O3, 5 to 22% of La2O3, 1 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 14 to 30%, 5 to 30% of ZnO, 0 to 10% of SiO2, 0 to 6.5% of ZrO2 and 0 to 1% of Sb2O3, substantially containing none of lead and fluorine, and having a refractive index (nd) of 1.72 to 1.83 and an Abbe's number (?d) of 45 to 55.Type: GrantFiled: February 20, 2002Date of Patent: January 18, 2005Assignee: Hoya CorporationInventors: Kazutaka Hayashi, Yasuhiro Fujiwara, Zou Xuelu
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Patent number: 6786064Abstract: Provided are a process for the production of a precision press-molded article having a high transmittance and a method of treating a glass to color or decolor the glass, the process comprising heat-treating a press-molded article containing at least one selected from WO3, Nb2O5 or TiO2 in an oxidizing atmosphere to produce a glass molded article, and the method comprising heat-treating a colored glass containing at least one oxide of WO3 and Nb2O5 in an oxidizing atmosphere to decolor the glass, or heat-treating a glass containing at least one oxide selected from WO3, Nb2O5 or TiO2 in a non-oxidizing atmosphere to color the glass.Type: GrantFiled: October 18, 2001Date of Patent: September 7, 2004Assignee: Hoya CorporationInventors: Kazutaka Hayashi, Hiromasa Tawarayama, Xuelu Zou, Hiroshi Kawazoe
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Patent number: 6777092Abstract: The present invention relates to a a glassy-film forming coating agent, a method of coating a substrate with the a glassy-film forming coating agent, a bottle coated with the glassy-film forming coating agent, and a coating system for coating a substrate with the glassy-film forming coating agent.Type: GrantFiled: November 12, 1999Date of Patent: August 17, 2004Assignees: Kirin Beer Kabushiki Kaisha, The Clean Japan Center FoundationInventors: Kazutaka Hayashi, Nam-Heun Kim, Akira Shirakura
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Publication number: 20030211929Abstract: A high-refractivity high-dispersion optical glass for producing an optical element, which requires no machining, such as polishing or lapping, of an optical-function surface after precision press molding, containing B2O3, SiO2, La2O3, Gd2O3, ZnO, Li2O, ZrO2 and Ta2O5 as essential components, containing 0 to 1 mol % of Sb2O3 as an optional component, substantially containing none of PbO and Lu2O3, having a glass transition temperature of 630° C. or lower, and (1) having a refractive index nd and an Abbe's number &ngr;d which satisfy all of the following relational expressions, 1.80<nd≦1.90, 35<&ngr;d≦50, and nd≧2.025−(0.005×&ngr;d) or (2) having an nd of greater than 1.85 and a &ngr;d of greater than 35.Type: ApplicationFiled: March 12, 2003Publication date: November 13, 2003Inventors: Kazutaka Hayashi, Xuelu Zou
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Publication number: 20030203354Abstract: A method for screening an apoptosis inhibitor characterized by screening a candidate via an effect on PGT. A cell protecting agent containing as the active ingredient a substance which can be incorporated into cells via prostaglandin transporter (PGT); and a screening method therefor comprising measuring the uptake into cells via PGT. An apoptosis inducer containing as the active ingredient a substance having a PGT inhibitory effect; and a screening method therefor comprising measuring the ability to induce apoptosis of cells with the expression of PGT. Because of having a cell apoptosis inhibitory effect, the cell protecting agent is useful as a nerve cell apoptosis inhibitor, a nerve cell protecting agent, etc. and applicable to the prevention or treatment of nervous diseases, etc. The apoptosis inducer is useful in preventing and/or treating diseases in association with cell proliferation such as tumor, etc.Type: ApplicationFiled: June 11, 2003Publication date: October 30, 2003Applicant: MITSUBISHI PHARMA CORPORATIONInventors: Tooru Kawamura, Satoshi Horie, Toshiaki Akira, Norifumi Nakamura, Tomoyuki Maruyama, Kazutaka Hayashi
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Publication number: 20030125186Abstract: A high-refractivity low-dispersion optical glass that gives press-molding preforms excellent in high-temperature shapability and suitable for precision press-molding, including an optical glass comprising B2O3, La2O3, Gd2O3 and ZnO as essential components, substantially containing none of lead and fluorine, having a refractive index (nd) of 1.72 to 1.83, an Abbe's number (vd) of 45 to 55 and a glass transition temperature (Tg) of 630° C. or lower and having a viscosity of at least 0.6 Pa•s at its liquidus temperature, and an optical glass comprising, by mol %, 45 to 65% of B2O3, 5 to 22% of La2O3, 1 to 20% of Gd2O3, provided that the total content of La2O3 and Gd2O3 is 14 to 30%, 5 to 30% of ZnO, 0 to 10% of SiO2, 0 to 6.5% of ZrO2 and 0 to 1% of Sb2O3, substantially containing none of lead and fluorine, and having a refractive index (nd) of 1.72 to 1.83 and an Abbe's number (vd) of 45 to 55.Type: ApplicationFiled: February 20, 2002Publication date: July 3, 2003Inventors: Kazutaka Hayashi, Yasuhiro Fujiwara, Zou Xuelu
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Publication number: 20030100433Abstract: Provided is an optical glass that has high-refractivity and high-dispersion properties and can give preforms for press-molding, which are excellent in shapability at high temperatures and suitable for precision press-molding.Type: ApplicationFiled: October 16, 2002Publication date: May 29, 2003Inventors: Kazutaka Hayashi, Xuelu Zou
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Publication number: 20020127228Abstract: A method for screening an apoptosis inhibitor characterized by screening a candidate via an effect on PGT. A cell protecting agent containing as the active ingredient a substance which can be incorporated into cells via prostaglandin transporter (PGT); and a screening method therefor comprising measuring the uptake into cells via PGT. An apoptosis inducer containing as the active ingredient a substance having a PGT inhibitory effect; and a screening method therefor comprising measuring the ability to induce apoptosis of cells with the expression of PGT. Because of having a cell apoptosis inhibitory effect, the cell protecting agent is useful as a nerve cell apoptosis inhibitor, a nerve cell protecting agent, etc. and applicable to the prevention or treatment of nervous diseases, etc. The apoptosis inducer is useful in preventing and/or treating diseases in association with cell proliferation such as tumor, etc.Type: ApplicationFiled: June 4, 2001Publication date: September 12, 2002Applicant: WELFIDE CORPORATIONInventors: Tooru Kawamura, Satoshi Horie, Toshiaki Akira, Norifumi Nakamura, Tomoyuki Maruyama, Kazutaka Hayashi
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Publication number: 20020073735Abstract: Provided are a process for the production of a precision press-molded article having a high transmittance and a method of treating a glass to color or decolor the glass, the process comprising heat-treating a press-molded article containing at least one selected from WO3, Nb2O5 or TiO2 in an oxidizing atmosphere to produce a glass molded article, and the method comprising heat-treating a colored glass containing at least one oxide of WO3 and Nb2O5 in an oxidizing atmosphere to decolor the glass, or heat-treating a glass containing at least one oxide selected from WO3, Nb2O5 or TiO2 in a non-oxidizing atmosphere to color the glass.Type: ApplicationFiled: October 18, 2001Publication date: June 20, 2002Inventors: Kazutaka Hayashi, Hiromasa Tawarayama, Xuelu Zou, Hiroshi Kawazoe
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Publication number: 20020042337Abstract: An optical glass having a high refractive index and high dispersion characteristics that is suited to application to precision press molding to precisely mold the shape of final products for objectives not requiring grinding or polishing. An optical glass exhibiting a refractive index in the range of from 1.75 to 2.0, an Abbé number in the range of from 20 to 28.5. Optical parts comprised of this glass; press-molding materials comprised of this glass; methods of manufacturing the same; and methods of manufacturing molded glass products employing these materials.Type: ApplicationFiled: June 29, 2001Publication date: April 11, 2002Inventors: Xuelu Zou, Hiromasa Tawarayama, Kazutaka Hayashi, Hiroshi Kawazoe
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Patent number: 6288113Abstract: An angiogenesis promoter containing a compound of the following formula (I) wherein R1 is acyl, R2 is alkyl, R3 and R4 are the same or different and each is hydrogen atom or hydroxy protecting group and R5 is alkyl, as an active ingredient. This compound itself not only has an angiogenesis promoting effect but also potentiates the angiogenic effect by a drug (e.g., b-FGF) having such effect. Therefore, it can express the angiogenesis promoting effect more effectively in the ischemic tissues and the site under different disease state, where b-FGF has locally increased.Type: GrantFiled: June 21, 2000Date of Patent: September 11, 2001Assignees: Welfide Corporation, Seikagaku CorporationInventors: Yasuhiro Egi, Yoshiji Kubo, Satoru Inoue, Hideaki Kido, Masakuni Nishikawa, Kazutaka Hayashi
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Patent number: 6284758Abstract: An angiogenesis promoter and angiogenesis potentiator containing a pyridazinone compound of the formula (I) wherein each symbol is as defined in the specification, or a pharmacologically acceptable salt thereof, as an active ingredient. The pyridazinone compound (I) and a pharmacologically acceptable salt thereof in the present invention promote angiogenesis and potentiate the angiogenic effect of a drug having such effect, and are useful as an angiogenesis promoter and angiogenesis potentiator.Type: GrantFiled: February 25, 2000Date of Patent: September 4, 2001Assignees: Welfide Corporation, Nissan Chemical Industries, Ltd.Inventors: Yasuhiro Egi, Hideaki Kido, Kazutaka Hayashi, Yoshiji Kubo, Norifumi Nakamura
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Patent number: 6122973Abstract: A capacitance-type pressure sensor capable of reducing a variation in reference capacitance. The capacitance-type pressure sensor includes insulating spacer (3b) arranged between a main capacitive electrode (4) and a reference capacitive electrode (5) to couple a base substrate (1) and a diaphragm substrate (2) to each other. The insulating spacer (3b) is patterned so as to restrain a variation in distance between the reference capacitive electrode (5) and a counter electrode (10) arranged on the diaphragm substrate (2). Such construction reduces a variation in capacitance between the reference capacitive electrode (5) and the diaphragm electrode (10), to thereby increase accuracy at which a pressure is measured.Type: GrantFiled: May 15, 1998Date of Patent: September 26, 2000Assignee: Hokuriku Electric Industry Co., Ltd.Inventors: Kazuo Nomura, Kiyoshi Tanaka, Satoshi Nakao, Hideki Tanigami, Kazutaka Hayashi