Patents by Inventor Katsuo Wada
Katsuo Wada 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: 6521293Abstract: A ceramic-coated blade of a gas turbine and a method of producing the same, in which the thickening of an Al2O3 layer at the interface between a ceramic layer and a primary layer is sufficiently prevented for a long period of time, thereby positively suppressing the separation of the ceramic layer. Using powder of MCrAlY alloy (Co—32%Ni—21%Cr—8%Al—0.5%Y), a primary layer (alloy coating layer) is formed on a surface of a substrate made of a heat-resistant Ni base alloy (Rene'-80). Further, a heat-resistant ceramic layer, comprising a mixture of ion-conductive ZrO2—8wt. %Y2O3 ceramic and insulative ceramic (e.g. Al2O3), is formed on the alloy coating layer. This mixture has a columnar structure in which columnar crystals are grown by a gas phase in a direction of a thickness of the coating, or a porous structure in which flattened particles brought about from molten particles caused to fly at high velocity are laminated.Type: GrantFiled: February 23, 2000Date of Patent: February 18, 2003Assignees: Hitachi, Ltd., The Tokyo Electric Power Co.Inventors: Yoshitaka Kojima, Hideyuki Arikawa, Mitsuo Haginoya, Katsuo Wada, Ryuta Watanabe, Yoshiaki Matsushita, Shin Yoshino
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Patent number: 6414012Abstract: Heterocyclic derivatives of the formula (I) wherein each symbol is as defined in the specification, pharmaceutically acceptable salts thereof and method of producing them. Pharmaceutical compositions containing the heterocyclic derivative or a pharmaceutically acceptable salt thereof, particularly, ACAT inhibitors and lipoperoxidation inhibitors. The heterocyclic derivatives and pharmaceutically acceptable salts thereof of the present invention show superior ACAT inhibitory activity and lipoperoxidation inhibitory activity, and are useful as ACAT inhibitors and hyperlipemia inhibitors. To be specific, they are useful for the prevention and treatment of arteriosclerotic lesions of arteriosclerosis, hyperlipemia and diabetes, as well as ischemic diseases of brain, heart and the like.Type: GrantFiled: August 12, 1999Date of Patent: July 2, 2002Assignee: Sankyo Company, LimitedInventors: Hiroshi Matsui, Shoji Kamiya, Hiroaki Shirahase, Shohei Nakamura, Katsuo Wada
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Patent number: 6200988Abstract: A heterocyclic derivative of the formula (I) wherein each symbol is as defined in the specification, and pharmaceutically acceptable salts thereof. The compound (I) of the present invention and pharmaceutically acceptable salts thereof exhibit superior ACAT inhibitory activity and lipoperoxidation inhibitory activity in mammals, and are useful as ACAT inhibitors and lipoperoxidation inhibitors. Specifically, they are useful for the prophylaxis and treatment of arteriosclerosis, hyperlipemia, arteriosclerosis in diabetes, and cerebrovascular and cardiovascular ischemic diseases.Type: GrantFiled: February 18, 2000Date of Patent: March 13, 2001Assignee: Kyoto Pharmaceutical Industries, Ltd.Inventors: Shoji Kamiya, Hiroaki Shirahase, Hiroshi Matsui, Shohei Nakamura, Katsuo Wada
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Patent number: 6199366Abstract: A gas turbine includes a compressor and a combustor having a first fuel supply system for supplying a first fuel and a second fuel supply system for supplying a second fuel lower in calorific value than the first fuel and burning compressed air and fuel supplied through switching the first fuel system and the second fuel system. A turbine is driven by combustion gas supplied from the combustor. An extraction system is provided for extracting part of the compressed air supplied from the compressor to the combustor. Control means are provided for controlling, so as to suppress a pressure change of the compressed air supplied to the combustor, by adjusting an opening of the control valve according to a calorific value of the second fuel when fuel supplied to the combustor is switched from the first fuel to the second fuel lower in calorific value than the first fuel.Type: GrantFiled: November 2, 1998Date of Patent: March 13, 2001Assignee: Hitachi, Ltd.Inventors: Hidetaro Murata, Isao Takehara, Mitsuo Teranishi, Katsuo Wada, Shinichi Hoizumi
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Patent number: 6127403Abstract: Heterocyclic derivatives of the formula (I) ##STR1## wherein each symbol is as defined in the specification, pharmaceutically acceptable salts thereof and method of producing them. Pharmaceutical compositions containing the heterocyclic derivative or a pharmaceutically acceptable salt thereof, particularly, ACAT inhibitors and lipoperoxidation inhibitors. The heterocyclic derivatives and pharmaceutically acceptable salts thereof of the present invention show superior ACAT inhibitory activity and lipoperoxidation inhibitory activity, and are useful as ACAT inhibitors and hyperlipemia inhibitors.To be specific, they are useful for the prevention and treatment of arteriosclerotic lesions of arteriosclerosis, hyperlipemia and diabetes, as well as ischemic diseases of brain, heart and the like.Type: GrantFiled: August 12, 1999Date of Patent: October 3, 2000Assignee: Sankyo Company, Ltd.Inventors: Hiroshi Matsui, Shoji Kamiya, Hiroaki Shirahase, Shohei Nakamura, Katsuo Wada
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Patent number: 6063806Abstract: A heterocyclic derivative of the formula (I) ##STR1## wherein each symbol is as defined in the specification, and pharmaceutically acceptable salts thereof. The compound (I) of the present invention and pharmaceutically acceptable salts thereof exhibit superior ACAT inhibitory activity and lipoperoxidation inhibitory activity in mammals, and are useful as ACAT inhibitors and lipoperoxidation inhibitors. Specifically, they are useful for the prophylaxis and treatment of arteriosclerosis, hyperlipemia, arteriosclerosis in diabetes, and cerebrovascular and cardiovascular ischemic diseases.Type: GrantFiled: April 3, 1998Date of Patent: May 16, 2000Assignee: Kyoto Pharmaceutical Industries, Ltd.Inventors: Shoji Kamiya, Hiroaki Shirahase, Hiroshi Matsui, Shohei Nakamura, Katsuo Wada
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Patent number: 6042951Abstract: A ceramic-coated blade of a gas turbine and a method of producing the same, in which the thickening of an Al.sub.2 O.sub.3 layer at the interface between a ceramic layer and a primary layer is sufficiently prevented for a long period of time, thereby positively suppressing the separation of the ceramic layer. Using powder of MCrAlY alloy (Co-32% Ni-21% Cr-8% Al-0.5% Y), a primary layer (alloy coating layer) is formed on a surface of a substrate made of a heat-resistant Ni base alloy (Rene'-80). Further, a heat-resistant ceramic layer, comprising a mixture of ion-conductive ZrO.sub.2 -8 wt. % Y.sub.2 O.sub.3 ceramic and insulative ceramic (e.g. Al.sub.2 O.sub.3), is formed on the alloy coating layer. This mixture has a columnar structure in which columnar crystals are grown by a gas phase in a direction of a thickness of the coating, or a porous structure in which flattened particles brought about from molten particles caused to fly at high velocity are laminated.Type: GrantFiled: February 2, 1998Date of Patent: March 28, 2000Assignees: Hitachi, Ltd., The Tokyo Electric Power Co., Inc.Inventors: Yoshitaka Kojima, Hideyuki Arikawa, Mitsuo Haginoya, Katsuo Wada, Ryuta Watanabe, Yoshiaki Matsushita, Shin Yoshino
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Patent number: 5990150Abstract: Heterocyclic derivatives of the formula (I) ##STR1## wherein each symbol is as defined in the specification, pharmaceutically acceptable salts thereof and method of producing them. Pharmaceutical compositions containing the heterocyclic derivative or a pharmaceutically acceptable salt thereof, particularly, ACAT inhibitors and lipoperoxidation inhibitors. The heterocyclic derivatives and pharmaceutically acceptable salts thereof of the present invention show superior ACAT inhibitory activity and lipoperoxidation inhibitory activity, and are useful as ACAT inhibitors and hyperlipemia inhibitors. To be specific, they are useful for the prevention and treatment of arteriosclerotic lesions of arteriosclerosis, hyperlipemia and diabetes, as well as ischemic diseases of brain, heart and the like.Type: GrantFiled: March 19, 1997Date of Patent: November 23, 1999Assignee: Sankyo Company, Ltd.Inventors: Hiroshi Matsui, Shoji Kamiya, Hiroaki Shirahase, Shohei Nakamura, Katsuo Wada
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Patent number: 5828512Abstract: An information reproducing apparatus which has a rotative driver for rotating a disc-shaped recording medium, a floating-type head for reproducing information recorded in the recording medium while floating above the disc-shaped recording medium that is being rotated by the rotative driver, and a suspension, made of an elastic member, for supporting the floating-type head. The information reproducing apparatus is characterized in that the floating-type head has a slider which is floated by an air flow that is directed near the surface of the rotating disc-shaped recording medium, and that the slider has a bevelled portion at one side that faces the outer edge of the disc-shaped recording medium such that any contact between the slider and the ridge that exists along the outer edge area of the disc-shaped recording medium is virtually eliminated.Type: GrantFiled: February 24, 1994Date of Patent: October 27, 1998Assignee: Sharp Kabushiki KaishaInventors: Katsuo Wada, Miyuki Onishi, Junichiro Nakayama, Tomoyuki Miyake, Takashi Iwaki, Takeshi Yamaguchi
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Patent number: 5749586Abstract: A gasket for use in sealing sanitary piping comprises an annular plate of porous polytetrafluoroethylene, the inner surface layer of the gasket being heat treated to form a pore-free fused solidified layer for directly contacting a fluid to be sealed. The fused solidified layer prevents osmotic leakage of sealed fluid. Since the solidified layer is formed only in the surface layer the intrinsic properties of porous polytetrafluoroethylene, such as flexibility and affinity, are retained. The gasket is made by inserting a tubular member with an internal heater into a porous polytetrafluoroethylene gasket so that the tubular member directly contacts the inner surface layer of the gasket. The tubular member is operated at a temperature of 420.degree. to 460.degree. C. and contacts a gasket for 10 to 30 seconds to form the fused and pore-free layer.Type: GrantFiled: June 20, 1996Date of Patent: May 12, 1998Assignee: Nippon Pillar Packing Co., Ltd.Inventors: Makoto Abe, Katsuo Wada, Takeshi Miyoshi, Tosiyasu Tanimura, Tetsuya Akai
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Patent number: 5625153Abstract: A method of estimating non-destructively the life expectancy of ceramic members, at least a surface layer of which is made of ceramics, is disclosed. The method comprises measuring a variation in at least one of physical characteristics of said ceramic members including color, grain size, electroconductivity and Young's modulus and estimating the life expectancy of the ceramic members on the basis of the predetermined relationship between the life of said ceramics and the physical characteristics. The method is excellent in estimation of the life expectancy of ceramic members of gas turbines or nuclear fusion reactor since the life expectancy of the members to be inspected can easily be estimated in a short time without fracturing the members.Type: GrantFiled: December 18, 1995Date of Patent: April 29, 1997Assignee: Hitachi, Ltd.Inventors: Yuichi Sawai, Yoshiyuki Yasutomi, Motoyuki Miyata, Hideki Tamaki, Katsuo Wada
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Patent number: 5611670Abstract: A gas-turbine moving blade made of a Ni-base superalloy containing less grain boundary strengthening elements, in which a blade portion is formed of a single crystal and the rest is formed of columnar crystals, and a gas turbine including the moving blade. A thermal efficiency of the gas turbine can be improved to 35% or more, and a thermal efficiency of complex power generation with a steam turbine can be improved to 45% or more.Type: GrantFiled: July 27, 1994Date of Patent: March 18, 1997Assignees: Hitachi, Ltd., Tohoku Electric Power Co., Inc.Inventors: Akira Yoshinari, Hideki Tamaki, Tosiaki Saito, Mitsuru Kobayashi, Katsumi Iijima, Katsuo Wada, Kimio Kano, Hiroyuki Matsuzaki
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Patent number: 5558883Abstract: A molding equipment for making composite molded article having:(a) a fixed side mold having a convex portion integral with a gate; the convex portion being formed according to the shape of the molded article; the gate being used for injecting melted resin into a resin molding space;(b) a movable side mold capable of being moved close to and away from the fixed side mold; the movable side mold having a concave portion; the concave portion being joined with the convex portion of the fixed side mold (1) to form the resin molding space when the molding equipment is clamped;(c) a set of slide cores being mounted between the fixed side mold (1) and the movable side mold; the slide cores being movable toward and away from the fixed side mold; and(d) a skin material setting frame being mounted between the fixed side mold and the slide cores; the skin material setting frame being capable of setting a skin material.Type: GrantFiled: December 28, 1994Date of Patent: September 24, 1996Assignees: Mitsui Toatsu Chemicals, Inc., Moriroku Kabushiki KaishaInventors: Tsunetoshi Shinada, Katsuo Wada, Masaki Misumi, Satoru Kurono
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Patent number: 5486543Abstract: A formed thermoplastic resin article is made of a thermoplastic resin and a foamed elastic polymer finely dispersed in the thermoplastic resin. The formed thermoplastic resin article can be produced by blending an elastic polymer, in which an endothermic foaming agent decomposable at a temperature of at least 160.degree. C. was mixed in advance at a temperature lower than a decomposition temperature of the endothermic foaming agent, in a thermoplastic resin and then plasticizing and forming the resultant resin blend at a temperature at least equal to the decomposition temperature of the endothermic foaming agent.Type: GrantFiled: December 22, 1993Date of Patent: January 23, 1996Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Tsunetoshi Shinada, Katsuo Wada, Haruo Inoue, Masaki Misumi, Akira Saito
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Patent number: 5313445Abstract: An information reproducing apparatus which has a rotating driver for rotating a disc-shaped recording medium, a floating-type head for reproducing information recorded in the recording medium while floating above the disc-shaped recording medium that is being rotated by the rotating driver, and a suspension, made of an elastic member, for supporting the floating-type head. The information reproducing apparatus is characterized in that the floating-type head has a slider which is floated by an air flow that is directed near the surface of the rotating disc-shaped recording medium, and that the slider has a bevelled portion at one side that faces the outer edge of the disc-shaped recording medium such that any contact between the slider and the ridge that exists along the outer edge area of the disc-shaped recording medium is virtually eliminated.Type: GrantFiled: February 25, 1992Date of Patent: May 17, 1994Assignee: Sharp Kabushiki KaishaInventors: Katsuo Wada, Miyuki Onishi, Junichiro Nakayama, Tomoyuki Miyake, Takashi Iwaki, Takeshi Yamaguchi
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Patent number: 5270995Abstract: A method and a device for recording and reproducing information utilizing a work function variation of a recording medium, the recording medium being made of a material whose work function can vary according to a structural change thereof caused by the irradiation of an electromagnetic wave or electron beam.Type: GrantFiled: March 1, 1993Date of Patent: December 14, 1993Assignee: Sharp Kabushiki KaishaInventors: Katsuo Wada, Etsuji Minami, Kenji Ohta
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Patent number: 4993222Abstract: A method and an apparatus for burning gaseous fuel, the composition of the fuel varying at times, wherein; main injection ports and sub-injection ports are arranged in such positions that the fuel injected through the sub-injection ports may be ignited by a flame formed from the fuel injected through the main injection ports; fuel passes are provided or conducting the gaseous fuel separately to the two groups of injection ports; and control valve is provided for adjusting the ratio of the fuel flow to the main injection ports to the fuel flow to the sub-injection ports; whereby the proportion of the fuel to be injected through the main injection ports is increased as the rate of burning the gaseous fuel increases.Type: GrantFiled: September 6, 1989Date of Patent: February 19, 1991Assignee: Hitachi, Ltd.Inventors: Kazumi Iwai, Akira Arai, Hiromi Koizumi, Katsuo Wada
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Patent number: 4926645Abstract: A catalytic combustor for a gas turbine comprises catalyst layers arranged in two stages in a direction of gas flow. Fuel supply nozzles are disposed close to and upstream of the downstream catalyst layer. A substantially constant amount of fuel is supplied from the fuel supply nozzles to form pilot flames by the downstream catalyst layer, which are above 1000 degrees C. and below 1500 degrees C. Combustible component having passed through the upstream catalyst layer is burned by the pilot flames.Type: GrantFiled: July 31, 1989Date of Patent: May 22, 1990Assignee: Hitachi, Ltd.Inventors: Kazumi Iwai, Hiromi Koizumi, Katsuo Wada
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Patent number: 4890453Abstract: A method and an apparatus for burning gaseous fuel, the composition of the fuel varying at times, wherein; main injection ports and sub-injection ports are arranged in such positions that the fuel injected through the sub-injection ports may be ignited by a flame formed from the fuel injected through the main injection ports; fuel passes are provided for conducting the gaseous fuel separately to the two groups of injection ports; and a control valve is provided for adjusting the ratio of the fuel flow to the main injection ports to the fuel flow to the sub-injection ports; whereby the proportion of the fuel to be injected through the main injection ports is increased as the rate of burning the gaseous fuel increases.Type: GrantFiled: February 8, 1988Date of Patent: January 2, 1990Assignee: Hitachi, Ltd.Inventors: Kazumi Iwai, Akira Arai, Hiromi Koizumi, Katsuo Wada
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Patent number: RE38970Abstract: A heterocyclic derivative of the formula (I) wherein each symbol is as defined in the specification, and pharmaceutically acceptable salts thereof. The compound (I) of the present invention and pharmaceutically acceptable salts thereof exhibit superior ACAT inhibitory activity and lipoperoxidation inhibitory activity in mammals, and are useful as ACAT inhibitors and lipoperoxidation inhibitors. Specifically, they are useful for the prophylaxis and treatment of arteriosclerosis, hyperlipemia, arteriosclerosis in diabetes, and cerebrovascular and cardiovascular ischemic diseases.Type: GrantFiled: September 30, 1996Date of Patent: February 7, 2006Assignee: Kyoto Pharmaceutical Industries, Ltd.Inventors: Shoji Kamiya, Hiroaki Shirahase, Hiroshi Matsui, Shohei Nakamura, Katsuo Wada