Patents by Inventor Katsuhiro Fujii
Katsuhiro Fujii 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: 11954925Abstract: Automatic substance preparation and evaluation systems and methods are provided for preparing and evaluating a fluidic substance, such as e.g. a sample with bodily fluid, in a container and/or in a dispense tip. The systems and methods can detect volumes, evaluate integrities, and check particle concentrations in the container and/or the dispense tip.Type: GrantFiled: February 28, 2022Date of Patent: April 9, 2024Assignee: Beckman Coulter, Inc.Inventors: Takayuki Mizutani, Katsuhiro Seo, Shigeru Fujii, Kazuki Umebara
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Patent number: 8841491Abstract: A method for producing a fluorene derivative by reacting fluorenone with a phenol or a phenoxyalcohol in the presence of an acid catalyst includes: adding an alkali to an obtained reaction liquid containing a fluorene derivative; and concentrating a resultant mixture liquid without removing the alkali thus added and a reaction product of the alkali, thereby separating an unreacted phenol or unreacted phenoxyalcohol.Type: GrantFiled: February 24, 2010Date of Patent: September 23, 2014Assignee: Taoka Chemical Co., Ltd.Inventors: Katsuhiro Fujii, Suguru Hata, Kohta Fukui, Hiroyuki Kato, Yuki Numata
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Patent number: 8436214Abstract: An object of the present invention is to provide (i) a novel non-crystalline form of 9,9-bis(4-(2-hydroxyethoxy) phenyl) fluorene, which non-crystalline form maintains quality at a certain level, and is excellent as a polymer material, and (ii) a method of preparing the non-crystalline form. According to the present invention, molten 9,9-bis(4-(2-hydroxyethoxy) phenyl) fluorene in a liquid form is cooled and therefore is solidified. With the method, it is possible to provide a novel non-crystalline form of 9,9-bis(4-(2-hydroxyethoxy) phenyl) fluorene which has a small risk that powder dust of 9,9-bis(4-(2-hydroxyethoxy) phenyl) fluorine might cause explosion or a health problem. Further, the non-crystalline form of 9,9-bis(4-(2-hydroxyethoxy) phenyl) fluorene can be adjusted arbitrarily in particle diameter by, for example, pulverizing the non-crystalline form in accordance with equipment or usage.Type: GrantFiled: June 1, 2010Date of Patent: May 7, 2013Assignee: Taoka Chemcial Co., Ltd.Inventors: Katsuhiro Fujii, Suguru Hata, Kohta Fukui
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Publication number: 20120095270Abstract: An object of the present invention is to provide (i) a novel non-crystalline form of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, which non-crystalline form maintains quality at a certain level, and is excellent as a polymer material, and (ii) a method of preparing the non-crystalline form. According to the present invention, molten 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene in a liquid form is cooled and therefore is solidified. With the method, it is possible to provide a novel non-crystalline form of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene which has a small risk that powder dust of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene might cause explosion or a health problem. Further, the non-crystalline form of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene can be adjusted arbitrarily in particle diameter by, for example, pulverizing the non-crystalline form in accordance with equipment or usage.Type: ApplicationFiled: June 1, 2010Publication date: April 19, 2012Applicant: TAOKA CHEMICAL CO., LTD.Inventors: Katsuhiro Fujii, Suguru Hata, Kohta Fukui
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Publication number: 20120029244Abstract: A method for producing a fluorene derivative by reacting fluorenone with a phenol or a phenoxyalcohol in the presence of an acid catalyst includes: adding an alkali to an obtained reaction liquid containing a fluorene derivative; and concentrating a resultant mixture liquid without removing the alkali thus added and a reaction product of the alkali, thereby separating an unreacted phenol or unreacted phenoxyalcohol.Type: ApplicationFiled: February 24, 2010Publication date: February 2, 2012Applicant: TAOKA CHEMICAL CO., LTD.Inventors: Katsuhiro Fujii, Suguru Hata, Kohta Fukui, Hiroyuki Kato, Yuki Numata
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Patent number: 8093434Abstract: A method of producing a crystal polymorph of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, comprising the steps of reacting fluorenone and 2-phenoxyethanol in the presence of a heteropolyacid, initiating deposition of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene at lower than 50° C. from the resultant mixture to obtain a crude product of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, dissolving the crude product in at least one solvent selected from the group consisting of aromatic hydrocarbon solvents, ketone solvents and ester solvents, and initiating deposition of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene at 50° C. or higher.Type: GrantFiled: February 1, 2008Date of Patent: January 10, 2012Assignee: Taoka Chemical Company, LimitedInventors: Katsuhiro Fujii, Kota Fukui
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Publication number: 20100105961Abstract: A method of producing a crystal polymorph of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, comprising the steps of reacting fluorenone and 2-phenoxyethanol in the presence of a heteropolyacid, initiating deposition of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene at lower than 50° C. from the resultant mixture to obtain a crude product of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene, dissolving the crude product in at least one solvent selected from the group consisting of aromatic hydrocarbon solvents, ketone solvents and ester solvents, and initiating deposition of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene at 50° C. or higher.Type: ApplicationFiled: February 1, 2008Publication date: April 29, 2010Applicant: Taoka Chemical Company, LimitedInventors: Katsuhiro Fujii, Kota Fukui
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Patent number: 6930850Abstract: A magnetic disk tester has a head clamp (35, 218) to position a magnetic head (15, 289). The head clamp has a micromotion stage (55, 273) provided with a stage (59, 205) which is horizontally moved by a piezo-element (77). The magnetic head is attached to the piezo-stage (55, 273). On the head clamp (218), a reflective scale (222) is attached to a back face of the piezo-stage, and a laser head (217) is oriented toward the head clamp (218). According to a reflected laser beam from the reflective scale, the position of the magnetic head (289) is detected. An error signal indicating the difference between the detected position and a reference position is used to control the head clamp (218). The piezo-element can operate at high frequencies, to easily make the magnetic head trace a target track and improve the positioning accuracy of the magnetic head.Type: GrantFiled: November 13, 2001Date of Patent: August 16, 2005Assignee: Kyodo Denshi System Co., Ltd.Inventors: Hitoshi Takagi, Kiyotaka Fukuoka, Mamoru Hatano, Katsuhiro Fujii
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Publication number: 20020057517Abstract: A magnetic disk tester has a head clamp (35, 218) to position a magnetic head (15, 289). The head clamp has a micromotion stage (55, 273) provided with a stage (59, 205) which is horizontally moved by a piezo-element (77). The magnetic head is attached to the piezo-stage (55, 273).Type: ApplicationFiled: November 13, 2001Publication date: May 16, 2002Inventors: Hitoshi Takagi, Kiyotaka Fukuoka, Mamoru Hatano, Katsuhiro Fujii
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Patent number: 5612602Abstract: A positioning device and method includes a motor having a rotation axis, a driver for driving the motor on the basis of control information, a detector for detecting position information of the rotation axis of the motor, and a digital signal processor for performing an operation on the control information in accordance with the position information detected by the detector.Type: GrantFiled: January 3, 1994Date of Patent: March 18, 1997Assignee: Canon Kabushiki KaishaInventors: Yoichi Kubota, Naoki Kawamata, Masahiro Morisada, Katsuhiro Fujii, Hiroshi Itoh, Hiroaki Takeishi
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Patent number: 5483059Abstract: There are disclosed a signal processing method, and a displacement information measuring apparatus utilizing such method, capable of providing highly reliable binary signals even in the presence of a time-dependent variation in the light emission intensity of the light source, a variation in the emission intensity resulting from a variation in the external temperature, or a variation in the optical transmittance resulting from smear on the optical scales, thereby enabling highly precise detection of the displacement information of the movable member.Type: GrantFiled: September 20, 1994Date of Patent: January 9, 1996Assignee: Canon Kabushiki KaishaInventors: Masahiko Igaki, Kenichi Kataoka, Katsuhiro Fujii
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Patent number: 5374366Abstract: A synthetic lubricating oil contains an esterification product obtained from a hydroxycarboxylic acid polyol ester (A) and at least one aliphatic monocarboxylic acid (B), and optionally either an aliphatic carboxylic acid having two or more carboxyl groups (C) or a combination of an aliphatic carboxylic acid having two or more carboxyl groups (C) and an aliphatic polyhydric alcohol (D).Type: GrantFiled: February 18, 1993Date of Patent: December 20, 1994Assignee: Sanken Chemical Co., Ltd.Inventors: Makoto Nakahara, Katsuhiro Fujii, Masao Izumi
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Patent number: 4666387Abstract: A press apparatus for magnetic injection molding machines in which only the portion of a movable table in close contact with a lower metal mold is made ferromagnetic material and the other portion of the movable table is made of non-magnetic material, thereby fully utilizing the magnetic flux generated by magnetic coils with high efficiency and reducing the magnetic resistance of the magnetic circuit.Type: GrantFiled: October 18, 1985Date of Patent: May 19, 1987Assignee: The Japan Steel Works, Ltd.Inventors: Akira Yokota, Masashi Kato, Katsuhiro Fujii