Patents by Inventor Masahito Ito
Masahito Ito 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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Publication number: 20020065632Abstract: A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the base line which changes gentler than a change in signal with respect to time in a peak area and which is sensitive to an area where a value of the signal data is small. A base line like a natural and smooth curve which isn't easily influenced by a local change in signal such as noise or the like can be set by an input of the flexibility.Type: ApplicationFiled: August 29, 2001Publication date: May 30, 2002Applicant: Hitachi, Ltd.Inventors: Masahito Ito, Kisaburo Deguchi, Yoshiaki Seki
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Patent number: 6393368Abstract: A method for analyzing a multichannel chromatogram is realized for accurately resolving overlapping peaks on a multichannel chromatogram to permit analysis of the composition of a sample. First, components of overlapping peaks are specified. A data matrix Dij is determined, and compressed in the wavelength direction to obtain a data matrix vector Di. By compressing three-dimensional data in the wavelength direction, noise components cancel with each other to obtain noise free two-dimensional data Di&bgr;. Next, the two-dimensional data is deconvoluted, final standard deviation s0 is registered, and the deconvoluted two-dimensional data is reconvoluted to a retention intensity matrix. A quantitative spectral intensity matrix is computed, components are identified, and the identified components are quantified. The quantified data is displayed on a screen.Type: GrantFiled: March 5, 1997Date of Patent: May 21, 2002Assignee: Hitachi, Ltd.Inventors: Masahito Ito, Kisaburo Deguchi
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Publication number: 20020046973Abstract: A method for analyzing a plurality of amino acids in a fluid sample by a user is provided comprising the steps of introducing the sample into a buffer solution, passing the sample in the buffer solution through a separation column and setting a lithium ion concentration in the buffer to no more than 0.3 mols/L up to a time before &bgr;-aminoisobutyric acid (&bgr;-AiBA) is eluted.Type: ApplicationFiled: June 13, 2001Publication date: April 25, 2002Inventors: Yoshio Fujii, Masahito Ito, Kimiyoshi Koda
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Patent number: 6314374Abstract: A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the base line which changes gentler than a change in signal with respect to time in a peak area and which is sensitive to an area where a value of the signal data is small. A base line like a natural and smooth curve which isn't easily influenced by a local change in signal such as noise or the like can be set by an input of the flexibility.Type: GrantFiled: May 1, 2000Date of Patent: November 6, 2001Assignees: Hitachi, Ltd., Hitachi Instruments Engineering Co., Ltd.Inventors: Masahito Ito, Kisaburo Deguchi, Yoshiaki Seki
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Patent number: 6159902Abstract: The invention relates to 1,3-oxazin-4-one derivatives of formula (I): ##STR1## and to their use as herbicides.Type: GrantFiled: June 10, 1998Date of Patent: December 12, 2000Assignees: Mitsubishi Chemical Corporation, Rhone-Poulenc Agriculture LTDInventors: Tetsuya Murata, Hideshi Mukaida, Yoshie Yamada, Yukiko Oe, Norishige Toshima, Sachio Kudo, Kouichi Araki, Atsushi Go, Masahito Ito, Virginia Smith, Thomas Yarwood, Michael Gingell, Lyn Jennens
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Patent number: 6148266Abstract: A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the base line which changes gentler than a change in signal with respect to time in a peak area and which is sensitive to an area where a value of the signal data is small. A base line like a natural and smooth curve which isn't easily influenced by a local change in signal such as noise or the like can be set by an input of the flexibility.Type: GrantFiled: February 22, 1996Date of Patent: November 14, 2000Assignee: Hitachi, Ltd.Inventors: Masahito Ito, Kisaburo Deguchi, Yoshiaki Seki
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Patent number: 6076047Abstract: A method of properly correcting a base line. A concept of flexibility of a base line is introduced as an input index and a gravitation is presumed between the base line and signal data which is measured, thereby constructing a method of correcting the base line which changes gentler than a change in signal with respect to time in a peak area and which is sensitive to an area where a value of the signal data is small. A base line like a natural and smooth curve which isn't easily influenced by a local change in signal such as noise or the like can be set by an input of the flexibility.Type: GrantFiled: February 16, 1999Date of Patent: June 13, 2000Assignee: Hitachi, Ltd.Inventors: Masahito Ito, Kisaburo Deguchi, Yoshiaki Seki
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Patent number: 6048984Abstract: The invention relates to compounds of formula (I): and to their use as herbicides, and to intermediates useful in their preparation.Type: GrantFiled: August 19, 1999Date of Patent: April 11, 2000Assignee: Rhone-Poulenc Agriculture LimitedInventors: Kouichi Araki, Takako Brett, Kei Domom, Atsushi Go, Masahito Ito, Hideshi Mukaida, Yukiko Oe
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Patent number: 5977376Abstract: The invention relates to compounds of formula (I): ##STR1## and to their use as herbicides.Type: GrantFiled: July 17, 1998Date of Patent: November 2, 1999Assignee: Rhone-Poulenc Agriculture LimitedInventors: Kouichi Araki, Takako Brett, Kei Domom, Atsushi Go, Masahito Ito, Hideshi Mukaida, Yukiko Oe
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Patent number: 5892581Abstract: In order to suppress base line drift due to change in a light source and to start analysis with a short waiting time so as to improve quantitative accuracy of analysis, a detected signal in a measurement wavelength and a detected signal in a reference wavelength are measured at each of arbitrary light intensity points by varying light intensity of a light source, and the corresponding relationship between the wavelengths is stored. An incident light intensity of the measurement wavelength is estimated from a detected signal in the reference wavelength based on the stored data.Type: GrantFiled: September 24, 1997Date of Patent: April 6, 1999Assignee: Hitachi, Ltd.Inventors: Toshihiko Sakaide, Masahito Ito, Yoshio Fujii, Shigeru Matsui
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Patent number: 5861217Abstract: Disclosed are a composite material having an anti-wear property and a process for producing the same. The composite material includes a matrix of a low melting point Sn alloy having a melting point of from 80.degree. to 280.degree. C., and metallic dispersing particles dispersed in the matrix in an amount of from 10 to 50% by volume. When the composite material is utilized to make a rough mold for preparing a prototype, it sharply improves the anti-wear property of the rough mold, and it can be re-used for a plurality of times without adversely affecting the sharply improved anti-wear property. The composite material provides the advantages effect best when the metallic dispersing particles are Fe-C alloy dispersing particles and/or Fe-W-C alloy dispersing particles which were subjected to a surface treatment including an Sn or Ni electroplating followed by a ZnCl.sub.2 .cndot.NH.sub.4 Cl flux depositing.Type: GrantFiled: November 8, 1996Date of Patent: January 19, 1999Assignees: Toyota Jidosha Kabushiki Kaisha, Nisshin Steel, Co., Ltd.Inventors: Satoru Kito, Masahito Ito, Fuminori Matuda, Eiki Takeshima, Yasuji Tanaka, Takahiro Fujii, Kenjiro Izutani
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Patent number: 5839496Abstract: Disclosed are a composite material having an anti-wear property and a process for producing the same. The composite material includes a matrix of a low melting point Sn alloy having a melting point of from 80.degree. to 280.degree. C., and metallic dispersing particles dispersed in the matrix in an amount of from 10 to 50% by volume. When the composite material is utilized to make a rough mold for preparing a prototype, it sharply improves the anti-wear property of the rough mold, and it can be refused for a plurality of times without adversely affecting the sharply improved anti-wear property. The composite material provides the advantageous effect best when the metallic dispersing particles are Fe-C alloy dispersing particles and/or Fe-W-C alloy dispersing particles which were subjected to a surface treatment including an Sn or Ni electroplating followed by a ZnCl.sub.2 .multidot.NH.sub.4 Cl flux depositing.Type: GrantFiled: November 8, 1996Date of Patent: November 24, 1998Assignees: Toyota Jidosha Kabushiki Kaisha, Nisshin Steel Co., Ltd.Inventors: Satoru Kito, Masahito Ito, Fuminori Matuda, Eiki Takeshima, Yasuji Tanaka, Takahiro Fujii, Kenjiro Izutani
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Patent number: 5827426Abstract: A liquid chromatograph and chromatography which can perform analysis at a higher speed with clearer separation between peaks. The liquid chromatograph comprises a separation column (10), a buffer pump (7) for feeding a plurality of buffers 1, 2, 3 and 4 into the separation column (10), a sampler (9) disposed in a flow path between the buffer pump (7) and the separation column (10) for introducing a sample to be analyzed into the flow path, and a reaction coil (14) for mixing and then reacting amino acids separated by the separation column (10) with a ninhydrin reagent. The separation column is sized so that a ratio (L1/R) of its length L1 to its inner diameter R is not more than 10. The particle size of an ion exchange resin filled in the separation column (10) is selected to be not more than 4 .mu.m.Type: GrantFiled: September 10, 1996Date of Patent: October 27, 1998Assignee: Hitachi, Ltd.Inventors: Yoshio Fujii, Masahito Ito, Hiroshi Satake
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Patent number: 5804142Abstract: A reference sample having a known concentration is injected into a chromatograph system before an unknown sample is analyzed. This is for the purpose of checking the deterioration of system performance or in other words for the purpose of checking system suitability. In the present invention, the chromatographic characteristic of the check sample at the time of deterioration of the system suitability is expected and stored in a memory in advance to be related to factors of deterioration of system suitability. A factor of deterioration is deduced by comparison between the actually analyzed chromatographic characteristic of the check sample and the relational data stored in the memory. A guidance required for removing the factor is displayed. Disclosed are preferred embodiments of a chromatograph system suitable for analyzing catecholamine or glycated hemoglobin.Type: GrantFiled: November 26, 1996Date of Patent: September 8, 1998Assignee: Hitachi, Ltd.Inventors: Masahito Ito, Junkichi Miura, Yoshio Fujii, Hiroshi Satake, Kasumi Yoshida
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Patent number: 5783450Abstract: A method and an instrument for separating and analyzing a very small quantity of constituents to be inspected contained in an analyte such as a class of catecholamines by liquid chromatography after labeling. The entire processes of analytical operations include principally three processes, a preparing process, an impurity elimination process and a separation process. When one sample is perceived, the sample is processed in these three processes. In this case, while one sample is being processed in an impurity elimination process, a sample preceeding the one sample is processed in a separation process, and a succeeding sample is processed in a preparing process. In other words, these three processes are performed essentially in parallel. With this, it is possible to remarkably reduce analysis time as compared with individual single sample analysis.Type: GrantFiled: May 12, 1995Date of Patent: July 21, 1998Assignee: Hitachi, Ltd.Inventors: Kasumi Yoshida, Junkichi Miura, Yoshio Fujii, Hiroshi Satake, Masahito Ito, Masao Kamahori
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Patent number: 5779872Abstract: Disclosed are a composite material having an anti-wear property and a process for producing the same. The composite material includes a matrix of a low melting point Sn alloy having a melting point of from 80.degree. to 280.degree. C., and metallic dispersing particles dispersed in the matrix in an amount of from 10 to 50% by volume. When the composite material is utilized to make a rough mold for preparing a prototype, it sharply improves the anti-wear property of the rough mold, and it can be re-used for a plurality of times without adversely affecting the sharply improved anti-wear property. The composite material provides the advantageous effect best when the metallic dispersing particles are Fe--C alloy dispersing particles and/or Fe--W--C alloy dispersing particles which were subjected to a surface treatment including an Sn or Ni electroplating followed by a ZnCl.sub.2 .multidot.NH.sub.4 Cl flux depositing.Type: GrantFiled: November 8, 1996Date of Patent: July 14, 1998Assignees: Toyota Jidosha Kabushiki Kaisha, Nisshin Steel Co., Ltd.Inventors: Satoru Kito, Masahito Ito, Fuminori Matuda, Eiki Takeshima, Yasuji Tanaka, Takahiro Fujii, Kenjiro Izutani
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Patent number: 5670379Abstract: A chromatograph system with improved automation is provided. In the chromatograph system of one embodiment, a regression line is set between retention times of predetermined peaks measured at each run in the past for a standard sample having known components. Referring to this regression line, the peak identifying condition, i.e., time window, is corrected. In another embodiment, there is provided a chromatograph apparatus having a function of estimating a limited life time of a system component. The analyzed results of the chromatograph system can thus be improved.Type: GrantFiled: January 13, 1995Date of Patent: September 23, 1997Assignees: Hitachi, Ltd., Hitachi Instruments Engineering Co., Ltd.Inventors: Masahito Ito, Junkichi Miura, Yoshio Fujii, Hiroshi Satake, Mitsuo Ito, Fuminori Umesato, deceased
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Patent number: 5644503Abstract: A method for analyzing a multichannel chromatogram is realized for accurately resolving overlapping peaks on a multichannel chromatogram to permit analysis of the composition of a sample. First, components of overlapping peaks are specified. A data matrix Dij is determined, and compressed in the wavelength direction to obtain a data matrix vector Di. By compressing three-dimensional data in the wavelength direction, noise components cancel with each other to obtain noise free two-dimensional data Di.beta.. Next, the two-dimensional data is deconvoluted, final standard deviation s0 is registered, and the deconvoluted two-dimensional data is reconvoluted to a retention intensity matrix. A quantitative spectral intensity matrix is computed, components are identified, and the identified components are quantified. The quantified data is displayed on a screen.Type: GrantFiled: March 24, 1995Date of Patent: July 1, 1997Assignee: Hitachi, Ltd.Inventors: Masahito Ito, Kisaburo Deguchi
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Patent number: 5641454Abstract: Disclosed are a composite material having an anti-wear property and a process for producing the same. The composite material includes a matrix of a low melting point Sn alloy having a melting point of from 80.degree. to 280.degree. C., and metallic dispersing particles dispersed in the matrix in an amount of from 10 to 50% by volume. When the composite material is utilized to make a rough mold for preparing a prototype, it sharply improves the anti-wear property of the rough mold, and it can be re-used for a plurality of times without adversely affecting the sharply improved anti-wear property. The composite material provides the advantageous effect best when the metallic dispersing particles are Fe--C alloy dispersing particles and/or Fe--W--C alloy dispersing particles which were subjected to a surface treatment including an Sn or Ni electroplating followed by a ZnCl.sub.2.NH.sub.4 Cl flux depositing.Type: GrantFiled: June 10, 1994Date of Patent: June 24, 1997Assignees: Toyota Jidosha Kabushiki Kaisha, Nisshin Steel Co., Ltd.Inventors: Satoru Kito, Masahito Ito, Fuminori Matuda, Eiki Takeshima, Yasuji Tanaka, Takahiro Fujii, Kenjiro Izutani
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Patent number: 5436166Abstract: The present invention relates to a chromatography analysis method and a system employing the same which are capable of automatically determining an constituents to be detected contained in the unknown sample based on results on measuring a standard sample. The standard sample is first separated to obtain its chromatogram. The system extracts the necessary information from the chromatogram to identify the peaks corresponding to the constituents to be detected to set widths of time windows for the peaks. Then, the time windows thus set are applied to the chromatograms obtained by the separation of the unknown sample to identify the constituents contained in the unknown sample. By employing the present invention, it is unnecessary for an operator to input the retention time of each constituent to the system.Type: GrantFiled: January 12, 1994Date of Patent: July 25, 1995Assignee: Hitachi, Ltd.Inventors: Masahito Ito, Junkichi Miura, Yoshio Fujii, Hiroshi Satake, Fuzio Yamada, Kouichi Tagami, Fuminori Umesato