Patents by Inventor Yoshihiko Higuchi
Yoshihiko Higuchi 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: 7635406Abstract: A low alloy steel, which has a chemical composition by mass %, of C: 0.1 to 0.55%, Si: 0.05 to 0.5%, Mn: 0.1 to 1%, S: 0.0001 to 0.005%, Al: 0.005 to 0.08%, Ti: 0.005 to 0.05%, Cr: 0.1 to 1.5%, Mo: 0.1 to 1%, O: 0.0004 to 0.005%, Ca: 0.0005 to 0.0045%, Nb: 0 to 0.1%, V: 0 to 0.5%, B: 0 to 0.005%, Zr: 0 to 0.10%, P?0.03%, and N?0.006%, with the balance being Fe and impurities, is manufactured by adjusting the value of ([Ti]/47.9)([N]/14)/([Ca])/40.1) satisfies not less than 0.0008 and not more than 0.0066, at the time of melting the said low alloy steel, wherein [Ti], [N] and [Ca] are the contents in the molten steel by mass % of Ti, N and Ca respectively. The thus-manufactured low steel alloy has a high SSC resistance with a yield stress of not less than 758 MPa.Type: GrantFiled: September 19, 2006Date of Patent: December 22, 2009Assignee: Sumitomo Metal Industries, Ltd.Inventors: Mitsuhiro Numata, Tomohiko Omura, Yoshihiko Higuchi
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Patent number: 7393502Abstract: A test device 1 for analyzing a specific component in a test solution with a reagent by allowing the solution introduced via a feed opening 4 to react with the reagent maintained in a predetermined position in a capillary tube 3 having the opening 4 and an air outlet 5. The tube is provided with two hydrophilic regions 31, 33 and a hydrophobic region 32. The region 31 transfers the solution from the opening 4 to the reagent. The region 33 is delimited to a predetermined area maintaining the reagent. The region 32 separates the region 31 from the region 33. The reagent and the solution are applied in predetermined amounts to the region 33. A measuring device need not previously measure the solution. The device is useful as an analytical device for rapid and easy analysis, and can be produced in a less number of steps because the reagent can be fixed by merely applying it onto a predetermined position.Type: GrantFiled: August 1, 2002Date of Patent: July 1, 2008Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Akio Okubo, Atsuko Katayama, Yoshiyuki Tanaka, Yoshihiko Higuchi, Masufumi Koike
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Patent number: 7264684Abstract: A steel for steel pipes which comprises, on the percent by mass basis, C: 0.2 to 0.7%, Si: 0.01 to 0.8%, Mn: 0.1 to 1.5%, S: 0.005% or less, P: 0.03% or less, Al: 0.0005 to 0.1%, Ti: 0.005 to 0.05%, Ca: 0.0004 to 0.005%, N: 0.007% or less, Cr: 0.1 to 1.5%, Mo: 0.2 to 1.0%, Nb: 0 to 0.1%, Zr: 0 to 0.1%, V: 0 to 0.5% and B: 0 to 0.005%, with the balance being Fe and impurities, in which non-metallic inclusions containing Ca, Al, Ti, N, O, and S are present, and in the said inclusions (Ca %)/(Al %) is 0.55 to 1.72, and (Ca %)/(Ti %) is 0.7 to 19 can be used as a raw material for oil country tubular goods, being used at a greater depth and in severer corrosive circumstances, such as casings and tubings for oil and/or natural gas wells, drilling pipes and drilling collars for excavation, and the like.Type: GrantFiled: July 15, 2005Date of Patent: September 4, 2007Assignee: Sumitomo Metal Industries, Ltd.Inventors: Mitsuhiro Numata, Tomohiko Omura, Yoshihiko Higuchi
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Patent number: 7247211Abstract: A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010%, Si: at most 0.5%, Mn: at most 1.5%, P: at most 0.12%, S: at most 0.030%, Ti: at most 0.10%, Al: at most 0.08%, and N: at most 0.0080%. The total number of non-metallic inclusions observed under a microscope in sixty fields in a sample prepared in accordance with JIS G0555 is at most 20. During manufacture of the steel, the amount of FeO+MnO in slag in a ladle at the time of continuous casting is controlled to at most 15%, and the throughput at the time of casting is made at most 5 tons per minute. The steel sheet does not develop pin hole defects or press cracks caused by inclusions when used for applications such as motor housings or oil filter housings requiring severe press forming.Type: GrantFiled: January 16, 2004Date of Patent: July 24, 2007Assignee: Sumitomo Metal Industries, Ltd.Inventors: Syuji Nakai, Tatsuo Kanai, Yoshihiko Higuchi, Sei Hiraki
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Publication number: 20070012383Abstract: A low alloy steel, which has a chemical composition by mass %, of C: 0.1 to 0.55%, Si: 0.05 to 0.5%, Mn: 0.1 to 1%, S: 0.0001 to 0.005%, Al: 0.005 to 0.08%, Ti: 0.005 to 0.05%, Cr: 0.1 to 1.5%, Mo: 0.1 to 1%, O: 0.0004 to 0.005%, Ca: 0.0005 to 0.0045%, Nb: 0 to 0.1%, V: 0 to 0.5%, B: 0 to 0.005%, Zr: 0 to 0.10%, P?0.03%, and N?0.006%, with the balance being Fe and impurities, is manufactured by adjusting the value of ([Ti]/47.9)([N]/14)/([Ca])/40.1) satisfies not less than 0.0008 and not more than 0.0066, at the time of melting the said low alloy steel, wherein [Ti], [N] and [Ca] are the contents in the molten steel by mass % of Ti, N and Ca respectively. The thus-manufactured low steel alloy has a high SSC resistance with a yield stress of not less than 758 MPa.Type: ApplicationFiled: September 19, 2006Publication date: January 18, 2007Inventors: Mitsuhiro Numata, Tomohiko Omura, Yoshihiko Higuchi
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Patent number: 6991762Abstract: A suction generating device for a sample analysis device is provided. The device comprises four parts, namely, a cover plate 61, a middle plate 62, a bottom plate 63 and an operation plate 64. A protruding portion 642 for compressing the suction generating chamber is formed in an approximately center portion on the lower side of the operation plate 64, a protruding portion 641 for operation is formed in an approximately center portion on the upper side of the operation plate 64. A cavity 631 for inserting the sample analysis device therein is formed in an approximately center portion in the bottom plate 63; and a hole 632 for light irradiation is punched in a determined portion in the cavity 631. A concave portion 623 for fitting the operation plate 64 therein is formed in the middle plate 62, and a window section 621 is formed in the center of the concave portion 623 to let the lower protruding portion 642 on the operation plate 64 protrude therethrough.Type: GrantFiled: September 5, 2000Date of Patent: January 31, 2006Assignee: Arkray, Inc.Inventors: Michio Naka, Kouji Hirayama, Yoshihiko Higuchi, Masufumi Koike, Hisashi Okuda
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Publication number: 20060016520Abstract: A steel for steel pipes which comprises, on the percent by mass basis, C: 0.2 to 0.7%, Si: 0.01 to 0.8%, Mn: 0.1 to 1.5%, S: 0.005% or less, P: 0.03% or less, Al: 0.0005 to 0.1%, Ti: 0.005 to 0.05%, Ca: 0.0004 to 0.005%, N: 0.007% or less, Cr: 0.1 to 1.5%, Mo: 0.2 to 1.0%, Nb: 0 to 0.1%, Zr: 0 to 0.1%, V: 0 to 0.5% and B: 0 to 0.005%, with the balance being Fe and impurities, in which non-metallic inclusions containing Ca, Al, Ti, N, O, and S are present, and in the said inclusions (Ca %)/(Al %) is 0.55 to 1.72, and (Ca %)/(Ti %) is 0.7 to 19 can be used as a raw material for oil country tubular goods, being used at a greater depth and in severer corrosive circumstances, such as casings and tubings for oil and/or natural gas wells, drilling pipes and drilling collars for excavation, and the like.Type: ApplicationFiled: July 15, 2005Publication date: January 26, 2006Inventors: Mitsuhiro Numata, Tomohiko Omura, Yoshihiko Higuchi
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Publication number: 20060018790Abstract: This invention provides a device for analyzing a sample which is capable of performing rapid and precise analysis of a small amount of sample, and whose gradient in a measuring apparatus is not limited. This device comprises approximately a rectangular plate shaped body comprising a base member made of resin and a transparent covering. A first depressed cylindrical concave portion is formed in the upper surface of the base member, and a groove is formed in communication with the first depressed cylindrical concave portion, the groove extending to the end of the protrusion portion 5c, and a second depressed cylindrical concave portion which is smaller than the first depressed cylindrical concave portion is formed in a certain position in the groove, the end of the groove opening to the outside at the end of the protrusion portion 5c. Then, the transparent covering is placed over the upper surface of the base member and then integrated together.Type: ApplicationFiled: September 23, 2005Publication date: January 26, 2006Applicant: ARKRAY, Inc.Inventors: Michio Naka, Kouji Hirayama, Yoshihiko Higuchi, Masufumi Koike, Hisashi Okuda
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Patent number: 6905653Abstract: Determining a substance to be measured in a liquid sample by measuring the degree of coloring obtained when the substance is subjected to coloring reaction in terms of reflectance. Polymer beads embedding light reflective particles are contained in a reagent layer of the dry measuring test device, or a light blocking layer containing light blocking particles, preferably polymer beads embedding the light blocking particles, is laminated on the reagent layer of the dry measuring test device. The reagent layer comprises a reagent containing a chromogen and a matrix which retains the reagent in the form of a layer, for determining the substance to be measured in the liquid sample by measuring the degree of coloring of the chromogen generated through the reaction between the substance and the reagent in terms of reflectance of light entered into the reagent layer.Type: GrantFiled: December 28, 1999Date of Patent: June 14, 2005Inventor: Yoshihiko Higuchi
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Publication number: 20040163741Abstract: A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010%, Si: at most 0.5%, Mn: at most 1.5%, P: at most 0.12%, S: at most 0.030%, Ti: at most 0.10%, Al: at most 0.08%, and N: at most 0.0080%. The total number of non-metallic inclusions observed under a microscope in sixty fields in a sample prepared in accordance with JIS G0555 is at most 20. During manufacture of the steel, the amount of FeO+MnO in slag in a ladle at the time of continuous casting is controlled to at most 15%, and the throughput at the time of casting is made at most 5 tons per minute. The steel sheet does not develop pin hole defects or press cracks caused by inclusions when used for applications such as motor housings or oil filter housings requiring severe press forming.Type: ApplicationFiled: January 16, 2004Publication date: August 26, 2004Applicant: Sumitomo Metal Industries, Ltd.Inventors: Syuji Nakai, Tatsuo Kanai, Yoshihiko Higuchi, Sei Hiraki
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Patent number: 6726782Abstract: A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010 %, Si: at most 0.5 %, Mn: at most 1.5 %, P: at most 0.12 %, S: at most 0.030 %, Ti: at most 0.10 %, Al: at most 0.08 %, and N: at most 0.0080 %. The total number of non-metallic inclusions observed under a microscope in sixty fields in a sample prepared in accordance with JIS G0555 is at most 20. During manufacture of the steel, the amount of FeO+MnO in slag in a ladle at the time of continuous casting is controlled to at most 15 %, and the throughput at the time of casting is made at most 5 tons per minute. The steel sheet does not develop pin hole defects or press cracks caused by inclusions when used for applications such as motor housings or oil filter housings requiring severe press forming.Type: GrantFiled: November 21, 2001Date of Patent: April 27, 2004Assignee: Sumitomo Metal Industries, Ltd.Inventors: Syuji Nakai, Tatsuo Kanai, Yoshihiko Higuchi, Sei Hiraki
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Patent number: 6540962Abstract: A test device 1 for analyzing a specific component in a test solution with a reagent by allowing the solution introduced via a feed opening 4 to react with the reagent maintained in a predetermined position in a capillary tube 3 having the opening 4 and an air outlet 5. The tube is provided with two hydrophilic regions 31,33 and a hydrophobic region 32. The region 31 transfers the solution from the opening 4 to the reagent. The region 33 is delimited to a predetermined area maintaining the reagent. The region 32 separates the region 31 from the region 33. The reagent and the solution are applied in predetermined amounts to the region 33. A measuring device need not previously measure the solution. The device is useful as an analytical device for rapid and easy analysis, and can be produced in a less number of steps because the reagent can be fixed by merely applying it onto a predetermined position.Type: GrantFiled: December 9, 1999Date of Patent: April 1, 2003Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Akio Okubo, Atsuko Katayama, Yoshiyuki Tanaka, Yoshihiko Higuchi, Masufumi Koike
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Publication number: 20030031593Abstract: A test device 1 for analyzing a specific component in a test solution with a reagent by allowing the solution introduced via a feed opening 4 to react with the reagent maintained in a predetermined position in a capillary tube 3 having the opening 4 and an air outlet 5. The tube is provided with two hydrophilic regions 31, 33 and a hydrophobic region 32. The region 31 transfers the solution from the opening 4 to the reagent. The region 33 is delimited to a predetermined area maintaining the reagent. The region 32 separates the region 31 from the region 33. The reagent and the solution are applied in predetermined amounts to the region 33. A measuring device need not previously measure the solution. The device is useful as an analytical device for rapid and easy analysis, and can be produced in a less number of steps because the reagent can be fixed by merely applying it onto a predetermined position.Type: ApplicationFiled: August 1, 2002Publication date: February 13, 2003Applicant: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Akio Okubo, Atsuko Katayama, Yoshiyuki Tanaka, Yoshihiko Higuchi, Masufumi Koike
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Publication number: 20020096232Abstract: A steel sheet with a thickness of at least 0.30 mm is made of an ultra-low carbon steel with a chemical composition including C: at most 0.010%, Si: at most 0.5%, Mn: at most 1.5%, P: at most 0.12%, S: at most 0.030%, Ti: at most 0.10%, Al: at most 0.08%, and N: at most 0.0080%. The total number of non- metallic inclusions observed under a microscope in sixty fields in a sample prepared in accordance with JIS G0555 is at most 20. During manufacture of the steel, the amount of FeO+MnO in slag in a ladle at the time of continuous casting is controlled to at most 15%, and the throughput at the time of casting is made at most 5 tons per minute. The steel sheet does not develop pin hole defects or press cracks caused by inclusions when used for applications such as motor housings or oil filter housings requiring severe press forming.Type: ApplicationFiled: November 21, 2001Publication date: July 25, 2002Inventors: Syuji Nakai, Tatsuo Kanai, Yoshihiko Higuchi, Sei Hiraki
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Patent number: 6325975Abstract: A suction generating device for a sample analysis device is provided. The device comprises four parts, namely, a cover plate 61, a middle plate 62, a bottom plate 63 and an operation plate 64. A protruding portion 642 for compressing the suction generating chamber is formed in an approximately center portion on the lower side of the operation plate 64, a protruding portion 641 for operation is formed in an approximately center portion on the upper side of the operation plate 64. A cavity 631 for inserting the sample analysis device therein is formed in an approximately center portion in the bottom plate 63, and a hole 632 for light irradiation is punched in a determined portion in the cavity 631. A concave portion 623 for fitting the operation plate 64 therein is formed in the middle plate 62, and a window section 621 is formed in the center of the concave portion 623 to let the lower protruding portion 642 on the operation plate 64 protrude therethrough.Type: GrantFiled: August 20, 1998Date of Patent: December 4, 2001Assignee: Arkray, Inc.Inventors: Michio Naka, Kouji Hirayama, Yoshihiko Higuchi, Masafumi Koike, Hisashi Okuda
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Patent number: 6194219Abstract: An analysis element for analyzing a specific component in a liquid sample is disclosed, which comprises a reagent comprising insoluble particles and boric acid. Furthermore, a method for preparing a reagent liquid for use in the preparation of an analysis element for analyzing a specific component in a liquid sample is disclosed, which comprises adding insoluble particles and boric acid to the reagent liquid.Type: GrantFiled: September 13, 1996Date of Patent: February 27, 2001Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Hisashi Sakamoto, Yoshinori Takahashi, Yoshihiko Higuchi, Takehiro Yamaguchi
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Patent number: 6180062Abstract: This invention provides a device for analyzing a sample which is capable of performing rapid and precise analysis of a small amount of sample, and whose gradient in a measuring apparatus is not limited. This device comprises approximately a rectangular plate shaped body comprising a base member made of resin and a transparent covering. A first depressed cylindrical concave portion is formed in the upper surface of the base member, and a groove is formed in communication with the first depressed cylindrical concave portion, the groove extending to the end of the protrusion portion 5c, and a second depressed cylindrical concave portion which is smaller than the first depressed cylindrical concave portion is formed in a certain position in the groove, the end of the groove opening to the outside at the end of the protrusion portion 5c. Then, the transparent covering is placed over the upper surface of the base member and then integrated together.Type: GrantFiled: February 22, 1999Date of Patent: January 30, 2001Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Michio Naka, Kouji Hirayama, Yoshihiko Higuchi, Masufumi Koike, Hisashi Okuda
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Patent number: 6022433Abstract: A method for fixing a reagent layer directly onto a supporting base plate in the preparation of a dry analysis kit for determining a specific component in a liquid specimen wherein at least one of the reagent layer and the base plate is a thermoplastic resin, and which comprises the steps of:placing the reagent layer in contact with the base plate and externally applying ultrasonic vibration and pressure to the two layers to generate frictional heat thereby to melt the surface of the thermoplastic resin;applying pressure to make the molten surface of thermoplastic resin bite the non-thermoplastic material or to integrate the surfaces of thermoplastic layer and base plate; andremoving the ultrasonic vibration and pressure.Type: GrantFiled: September 21, 1998Date of Patent: February 8, 2000Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Minoru Ota, Yoshinori Takahashi, Yoshihiko Higuchi, Takashi Tsujii
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Patent number: 6001307Abstract: This invention provides a device for analyzing a sample which is capable of performing rapid and precise analysis of a small amount of sample, and whose gradient in a measuring apparatus is not limited. This device comprises approximately a rectangular plate shaped body comprising a base member made of resin and a transparent covering. A first depressed cylindrical concave portion is formed in the upper surface of the base member, and a groove is formed in communication with the first depressed cylindrical concave portion, the groove extending to the end of the protrusion portion 5c, and a second depressed cylindrical concave portion which is smaller than the first depressed cylindrical concave portion is formed in a certain position in the groove, the end of the groove opening to the outside at the end of the protrusion portion 5c. Then, the transparent covering is placed over the upper surface of the base member and then integrated together.Type: GrantFiled: April 22, 1997Date of Patent: December 14, 1999Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Michio Naka, Kouji Hirayama, Yoshihiko Higuchi, Masufumi Koike, Hisashi Okuda
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Patent number: 5846359Abstract: A method for fixing a reagent layer directly onto a supporting base plate in the preparation of a dry analysis kit for determining a specific component in a liquid specimen wherein at least one of the reagent layer and the base plate is a thermoplastic resin, and which comprises the steps of:placing the reagent layer in contact with the base plate and externally applying ultrasonic vibration and pressure to the two layers to generate frictional heat thereby to melt the surface of the thermoplastic resin;applying pressure to make the molten surface of thermoplastic resin bite the non-thermoplastic material or to integrate the surfaces of thermoplastic layer and base plate; andremoving the ultrasonic vibration and pressure.Type: GrantFiled: February 8, 1996Date of Patent: December 8, 1998Assignee: Kyoto Daiichi Kagaku Co., Ltd.Inventors: Minoru Ota, Yoshinori Takahashi, Yoshihiko Higuchi, Takashi Tsujii