Patents by Inventor Takayuki Oka
Takayuki Oka 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).
-
Publication number: 20150204889Abstract: An object of the present invention is to provide a hemoglobin S analysis method, a hemoglobin A2 analysis method, and a hemoglobin A0 analysis method which enable even highly retentive hemoglobin S, hemoglobin A2 and hemoglobin A0 to be separated in sharp, highly symmetrical peaks by means of cation-exchange high-performance liquid chromatography. The present invention relates to a method for analyzing hemoglobin S by cation-exchange high-performance liquid chromatography, the method including utilizing an eluent that contains an azide or a cyanide at a concentration of 0.1 to 50 mmol/L and has a pH of 6.80 to 7.50.Type: ApplicationFiled: March 12, 2015Publication date: July 23, 2015Inventors: Hiroaki TAIRA, Takayuki OKA
-
Patent number: 9017491Abstract: A hot-forged copper alloy part which has a tubular shape, in which an alloy composition contains 59.0 mass % to 84.0 mass % of Cu and 0.003 mass % to 0.3 mass % of Pb with a remainder of Zn and inevitable impurities, a content of Cu [Cu] mass % and a content of Pb [Pb] mass % have a relationship of 59?([Cu]+0.5×[Pb])?64, a shape of the forged part satisfies a formula of 0.4?(average inner diameter)/(average outer diameter)?0.92, 0.04?(average thickness)/(average outer diameter)?0.3, and 1?(tube axis direction length)/(average thickness))?10, a forging material which is to be hot-forged has a tubular shape and satisfies 0.3?(average inner diameter/average outer diameter)?0.88, 0.06?(average thickness)/(average outer diameter)?0.35, and 0.8?(tube axis direction length)/(average thickness))?12, and 0%?(degree of uneven thickness)?30%, 0?(degree of uneven thickness)?75×1/((tube axis direction length)/(average thickness))1/2 in any location in a tube axis direction.Type: GrantFiled: November 2, 2012Date of Patent: April 28, 2015Assignee: Mitsubishi Shindoh Co., Ltd.Inventors: Keiichiro Oishi, Takayuki Oka, Shin Oikawa
-
Publication number: 20150024503Abstract: An object of the present invention is to provide a method for analyzing hemoglobins which can accurately separate hemoglobins in a short time by liquid chromatography. The present invention provides a method for analyzing hemoglobins by liquid chromatography which includes pre-treating a sample with an oxidant and a binder for trivalent heme iron.Type: ApplicationFiled: October 7, 2014Publication date: January 22, 2015Inventors: Hiroaki TAIRA, Takayuki OKA
-
Publication number: 20140287453Abstract: When injecting a sample into carrier-liquid channels (3A and 3B), injection shock is prevented. Septa 13 and 14 constitute the upper wall and the lower wall of a sample injection part (11) of the carrier-liquid channels (3A and 3B). A needle (27) can vertically penetrate the septum (13) on the upper wall side and also penetrate the septum (14) on the lower wall side. A needle moving unit (28) induces the needle (27) to penetrate the septum (14) on the lower wall side and induces the tip of the needle to face the inside of a sample vessel (26). A measurement pump (29) is operated for drawing and as a result a sample is drawn into the needle (27). Next, the needle (27) is extracted from the septum (14) on the lower wall side, the tip of the needle is induced to face the inside of the sample injection part (11), the measurement pump (29) is caused to discharge and as a result the sample within the needle (27) is injected.Type: ApplicationFiled: November 9, 2012Publication date: September 25, 2014Inventors: Takayuki Oka, Takuya Yotani, Hideki Muraki
-
Publication number: 20140251488Abstract: A hot-forged copper alloy part which has a tubular shape, in which an alloy composition contains 59.0 mass % to 84.0 mass % of Cu and 0.003 mass % to 0.3 mass % of Pb with a remainder of Zn and inevitable impurities, a content of Cu [Cu] mass % and a content of Pb [Pb] mass % have a relationship of 59?([Cu]+0.5×[Pb])?64, a shape of the forged part satisfies a formula of 0.4?(average inner diameter)/(average outer diameter)?0.92, 0.04?(average thickness)/(average outer diameter)?0.3, and 1?(tube axis direction length)/(average thickness))?10, a forging material which is to be hot-forged has a tubular shape and satisfies 0.3?(average inner diameter/average outer diameter)?0.88, 0.06?(average thickness)/(average outer diameter)?0.35, and 0.8?(tube axis direction length)/(average thickness))?12, and 0%?(degree of uneven thickness)?30%, 0?(degree of uneven thickness)?75×1/((tube axis direction length)/(average thickness))1/2 in any location in a tube axis direction.Type: ApplicationFiled: November 2, 2012Publication date: September 11, 2014Applicant: Mitsubishi Shindoh Co., LtdInventors: Keiichiro Oishi, Takayuki Oka, Shin Oikawa
-
Publication number: 20130130391Abstract: An object of the present invention is to provide a method for analyzing hemoglobins which can accurately separate hemoglobins in a short time by liquid chromatography. The present invention provides a method for analyzing hemoglobins by liquid chromatography which includes pre-treating a sample with an oxidant and a binder for trivalent heme iron.Type: ApplicationFiled: March 22, 2011Publication date: May 23, 2013Inventors: Hiroaki Taira, Takayuki Oka
-
Publication number: 20120015388Abstract: The ionic strength of a diluent for preparing an analytical sample is set to be 0.06 to 0.16. The analytical sample prepared by using the diluent having the ionic strength within this range can be subjected to both for analyzing a first object in a test sample by electrode method and for analyzing a second object in the test sample by liquid chromatography method, and high-precision measurement can be attained. The analytical sample is especially useful for preparing a sample for measurement used both for measuring glucose concentration in a blood sample by enzyme electrode method and for measuring glycohemoglobin concentration in the blood sample by liquid chromatography method.Type: ApplicationFiled: June 22, 2011Publication date: January 19, 2012Applicants: SEKISUI MEDICAL CO., LTD., ARKRAY, Inc.Inventors: Takeshi Takagi, Toshikatsu Sakai, Chiaki Miyamoto, Takefumi Asami, Tatsuo Kamata, Takuya Yotani, Takayuki Oka
-
Publication number: 20110186511Abstract: A liquid chromatography apparatus is provided with a sample preparation unit, a column that separates components of a sample, an eluent supplier that includes a feeder for supplying eluents to the column, a flow path directional valve capable of introducing fixed amounts of the sample and the eluents to the column, an analyzer for analyzing a test solution composed of the sample components separated by the column and one of the eluents, and a controller, wherein the eluent supplier supplies the eluents to the flow path directional valve in an unmixed state. As a result of employing this configuration, analysis time is shortened and eluent consumption is reduced.Type: ApplicationFiled: October 6, 2009Publication date: August 4, 2011Applicants: ARKRAY, INC., SEKISUI MEDICAL CO., LTD.Inventors: Toshikatsu Sakai, Akira Sezaki, Takeshi Takagi, Takuya Yotani, Makoto Takahara, Takayuki Oka
-
Patent number: 7632688Abstract: It is an object of the present invention to provide magnetic substance-encapsulated particles which have uniform magnetism, high dispersion stability and a narrow particle size distribution, a method of producing the same, particles for immunoassay formed by using the magnetic substance-encapsulated particles and a method of immunoassay in which the magnetic substance-encapsulated particles or the particles for immunoassay are used. The present invention relates to a magnetic substance-encapsulated particle, which comprises an organic polymer material and a magnetic substance having an average particle size of 1 to 30 nm, the magnetic substance being contained within a particle in a state of being dispersed.Type: GrantFiled: April 16, 2004Date of Patent: December 15, 2009Assignee: Sekisui Chemical Co., Ltd.Inventors: Takayuki Oka, Izumi Omoto, Haruma Kawaguchi, Wataru Wakui
-
Publication number: 20060188932Abstract: It is an object of the present invention to provide magnetic substance-encapsulated particles which have uniform magnetism, high dispersion stability and a narrow particle size distribution, a method of producing the same, particles for immunoassay formed by using the magnetic substance-encapsulated particles and a method of immunoassay in which the magnetic substance-encapsulated particles or the particles for immunoassay are used. The present invention relates to a magnetic substance-encapsulated particle, which comprises an organic polymer material and a magnetic substance having an average particle size of 1 to 30 nm, the magnetic substance being contained within a particle in a state of being dispersed.Type: ApplicationFiled: April 16, 2004Publication date: August 24, 2006Inventors: Takayuki Oka, Izumi Omoto, Haruma Kawaguchi, Wataru Wakui
-
Patent number: 6428704Abstract: A method for determining hemoglobins is provided which is suitable for determination of stable hemoglobin A1c. A method for determining hemoglobins by cation exchange liquid chromatography wherein an eluent is used containing a chaotropic ion and further an inorganic acid, an organic acid and/or any salt thereof having a buffer capacity in the 4.0-6.8 pH range.Type: GrantFiled: February 7, 2001Date of Patent: August 6, 2002Assignee: Sekisui Chemical Co., Ltd.Inventors: Yuji Setoguchi, Kazuyuki Oishi, Kazuhiko Shimada, Toshiki Kawabe, Takayuki Oka
-
Patent number: 5886122Abstract: The object is directed toward obtaining a process for preparing a solvent-type acrylic pressure-sensitive adhesive which is able to increase a conversion at polymerization in the preparation of the solvent-type acrylic pressure-sensitive adhesive to thereby solve the problems of odors associated with residual monomers and of attachment of gels on reactor walls, and further to provide improved productivity and workability.In the preparation of the solvent-type acrylic pressure-sensitive adhesives, a monomer composition containing alkyl (meth)acrylate ester as its main component is subjected to solution polymerization under a closed condition at least in a latter stage of the polymerization reaction. In the polymerization, the solution to be polymerized is maintained at temperatures not lower than a boiling point thereof under normal pressures or at 50.degree.-120.degree. C.Type: GrantFiled: September 15, 1997Date of Patent: March 23, 1999Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Takayuki Oka, Kenji Tsubota, Takashi Shinjo, Takeshi Nakachi, Mitsue Matsumoto, Motoi Nagano
-
Patent number: 5786909Abstract: A photographic printing apparatus including a lens controlled to be positioned at a printing position, immediately adjacent a film negative, during photographic printing operation of the apparatus and at a normal position, displaced from the film negative, during other operations of the apparatus. Positioning the lens at the normal position, displaced from the film negative, enables the lens to be more easily protected and adjusted. The apparatus further includes a sample print detector apparatus comprising a CCD camera for capturing the sample print for display on a video monitor with a print position recognizing cursor. Key-subject points are specified with the cursor and mismatch between the key-subject points is determined in order to provide correction of filming-position. A rotating mechanism is also provided for rotating a negative mask member, lens member and exposure station by an identical angle of rotation to obtain a predetermined angle of exposure.Type: GrantFiled: December 16, 1993Date of Patent: July 28, 1998Assignee: Noritsu Koki Co., Ltd.Inventors: Hiroshi Miyawaki, Mitsuhiko Itojima, Hiroto Nakao, Takayuki Oka, Hisahiro Maeda, Masaaki Tsuji, Toshiro Akira
-
Patent number: 5502540Abstract: In front of an exposure stage and behind the exposure stage, loop spaces are provided on the roll paper transporting path of a printing/developing apparatus. The movement of the exposure stage is ensured by the loop. When the roll paper is fixed, one loop space is provided in front of the exposure stage, and one loop space behind the stage, thus allowing the exposure stage to move. Alternatively, the negative mask unit and lens unit of the apparatus are movable, so that roll paper is usable when the exposure stage is fixed.Type: GrantFiled: May 17, 1994Date of Patent: March 26, 1996Assignee: Noritsu Koki Co., Ltd.Inventors: Hiroshi Miyawaki, Takayuki Oka, Masaaki Tsuji
-
Patent number: 5500712Abstract: A negative detection device comprising the likes of a CCD camera and line sensors is incorporated in a 3D photographic printing apparatus in which a lenticular sheet is used. The negative detection device measures the positional shift of the key subject of the 2D negative. If the key subject shift exceeds a predetermined threshold value, a correction is introduced to regulate the spacial parallax of a background object. If the key subject shift is less than a predetermined threshold value a correction is introduced to regulate the spacial parallax of a foreground object. Exposure is performed after positional adjustments are made.Type: GrantFiled: February 28, 1994Date of Patent: March 19, 1996Assignee: Noritsu Koki Co., Ltd.Inventors: Hiroshi Miyawaki, Mitsuhiko Itojima, Takayuki Oka, Kazuyoshi Yamamoto, Toshiro Akira, Masaaki Tsuji
-
Patent number: D719670Type: GrantFiled: January 23, 2014Date of Patent: December 16, 2014Assignee: Sekisui Medical Co., Ltd.Inventors: Masato Nishikawa, Takayuki Oka, Takuya Yotani
-
Patent number: D719671Type: GrantFiled: January 23, 2014Date of Patent: December 16, 2014Assignee: Sekisui Medical Co., Ltd.Inventors: Masato Nishikawa, Takayuki Oka, Takuya Yotani
-
Patent number: D734484Type: GrantFiled: January 23, 2014Date of Patent: July 14, 2015Assignee: SEKISUI MEDICAL CO., LTD.Inventors: Masato Nishikawa, Takayuki Oka, Takuya Yotani