Patents by Inventor Tatsuya Ozawa
Tatsuya Ozawa 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: 7473393Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: GrantFiled: November 7, 2006Date of Patent: January 6, 2009Assignee: JFE Steel CorporationInventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Publication number: 20070051203Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: ApplicationFiled: November 7, 2006Publication date: March 8, 2007Applicant: JFE Steel Corporation, a corporation of JapanInventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Patent number: 7141205Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: GrantFiled: December 22, 2004Date of Patent: November 28, 2006Assignee: JFE Steel CorporationInventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Publication number: 20050103160Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: ApplicationFiled: December 22, 2004Publication date: May 19, 2005Applicant: JFE Steel Corporation, a corporation of JapanInventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Patent number: 6872074Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: GrantFiled: May 4, 2004Date of Patent: March 29, 2005Assignee: JFE Steel CorporationInventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Publication number: 20040202979Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: ApplicationFiled: May 4, 2004Publication date: October 14, 2004Applicant: JFE Steel Corporation, a corporation of JapanInventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Patent number: 6733635Abstract: A coke oven buckstay moving device and method which can be used to quickly, reliably, and smoothly repair buckstays compared to conventional methods and devices. The coke oven buckstay moving means includes a main car, a subcar, a frame, and securing means. The main car is used when repairing pillered buckstays that support oven walls of the coke oven, and moves on a coke side platform or a machine side platform. The subcar is placed on the main car, and can freely move forward and backward in a direction of a lengthwise direction of the coke oven. The frame is provided in a standing manner on the subcar. The securing members are mounted to the frame and are used to grasp and secure the buckstays. According to the method, a damaged portion of the buckstay is secured to the subcar, cut, and then removed. Reversing the steps, a replacement buckstay is secured to the subcar, moved into position, and welded into place. The subcar is detached, and the oven repaired.Type: GrantFiled: December 22, 1999Date of Patent: May 11, 2004Assignee: JFE Steel CorporationInventors: Tatsuya Ozawa, Nozomu Tamura, Tetsuro Uchida, Nobuya Kamide
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Patent number: 6629839Abstract: The invention provides a method and apparatus for charging a raw material and a carbonaceous material, in which a reduced product generated on a hearth can be quickly melted for reliable separation into a metal and slag, and the metal and the slag can be easily discharged out of a furnace as individual small agglomerates. With the charging method and apparatus, when charging the raw material and the carbonaceous material onto the moving hearth of the moving hearth furnace, the carbonaceous material is first charged onto the moving hearth to form a carbonaceous material layer thereon. The raw material or a mixture of the raw material and a carbonaceous material is then charged onto the carbonaceous material layer to form a raw material layer thereon. A projection is then pressed against the raw material layer from above, thereby forming a plurality of recesses in the surface of the carbonaceous material layer.Type: GrantFiled: July 27, 2001Date of Patent: October 7, 2003Assignee: Kawasaki Steel CorporationInventors: Tatsuya Ozawa, Tetsuya Yamamoto, Yoshitaka Sawa
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Patent number: 6539602Abstract: Repairing a chamber coke oven by heat-insulating a repair space in the oven, dividing a brick wall in a portion to be repaired into a plurality of layers stacked one above another, dismantling and removing the brick wall in the repaired portion, and carrying refractory assemblies into the oven one by one, each of the refractory assemblies being manufactured outside the oven by combining a plurality of bricks together correspond in shape to each of the stacked layers in one-to-one relation, thereby building the brick wall in the repaired portion with the refractory assemblies. A damaged combustion chamber brick wall of the coke oven near an oven opening can be repaired with high efficiency.Type: GrantFiled: December 21, 1999Date of Patent: April 1, 2003Assignees: Kawasaki Steel Corporation, Otto CorporationInventors: Tatsuya Ozawa, Nozomu Tamura, Tetsuro Uchida, Nobuya Kamide, Yuzuru Osaki, Yoshiharu Sato
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Publication number: 20020053307Abstract: A method for discharging a reduced product produced on a movable hearth of a movable-hearth furnace uses a discharging device. The discharging device includes a removal unit for removing the reduced product from the movable hearth, a separation unit for separating the reduced product from a solid reductant, a leaving-returning unit for either leaving substances other than the reduced product on a solid reductant layer or returning the substances onto the solid reductant layer, and a discharge unit for discharging the reduced product to the outside of the movable-hearth furnace.Type: ApplicationFiled: October 24, 2001Publication date: May 9, 2002Inventors: Natsuo Ishiwata, Tatsuya Ozawa, Yoshitaka Sawa, Tetsuya Yamamoto, Kanji Takeda, Tetsuya Kikui
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Publication number: 20020022208Abstract: The invention provides a method and apparatus for charging a raw material and a carbonaceous material, in which a reduced product generated on a hearth can be quickly melted for reliable separation into a metal and slag, and the metal and the slag can be easily discharged out of a furnace as individual small agglomerates. With the charging method and apparatus, when charging the raw material and the carbonaceous material onto the moving hearth of the moving hearth furnace, the carbonaceous material is first charged onto the moving hearth to form a carbonaceous material layer thereon. The raw material or a mixture of the raw material and a carbonaceous material is then charged onto the carbonaceous material layer to form a raw material layer thereon. A projection is then pressed against the raw material layer from above, thereby forming a plurality of recesses in the surface of the carbonaceous material layer.Type: ApplicationFiled: July 27, 2001Publication date: February 21, 2002Applicant: Kawasaki Steel CorporationInventors: Tatsuya Ozawa, Tetsuya Yamamoto, Yoshitaka Sawa
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Publication number: 20010020940Abstract: In an information processor having a power control function for controlling the power of devices that make up a system, a battery drive time during which the information processor is to be battery-powered is specified by a user. Power control parameters for the devices are computed on the basis of the specified battery drive time. Each of the computed power control parameters is then set up on a corresponding respective one of the devices.Type: ApplicationFiled: March 6, 2001Publication date: September 13, 2001Applicant: Kabushiki Kaisha ToshibaInventors: Ryu Nakazato, Tatsuya Ozawa
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Patent number: 6139692Abstract: The pressure in the coking chamber of a coke oven is held at about atmospheric pressure, and the temperatures at the opposite longitudinal ends of the combustion chamber are independently controlled. Fuel gas is supplied to hold the temperature at the opposite longitudinal ends to be at least about 1000.degree. C. separately from a main burner for the combustion chamber, and the pressure in the coking chamber during the first part of coking is kept in a range from 5 mmH.sub.2 O below atmospheric to 10 mmH.sub.2 O above atmospheric pressure. This allows efficient coke production even with low moisture content coking coal, and coal crumbling near the oven doors is not a problem. The process is typically carried out in a coke oven having a pressure control system for each coking chamber including plural piping devices for supplying a pressure fluid and switching valves for selectively applying the pressure fluid to the nozzle in the rising pipe through any selected one of the piping systems.Type: GrantFiled: March 24, 1998Date of Patent: October 31, 2000Assignee: Kawasaki Steel CorporationInventors: Nozomu Tamura, Tatsuya Ozawa, Tetsuro Uchida, Katsuhiko Sato, Hidetaka Suginobe
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Patent number: 5041375Abstract: This invention relates to a method for producing carnitine comprising contacting, in a reaction medium, carnitinenitrile with (A) a nitrilase capable of hydrolyzing carnitinenitrile to form carnitine or (B) a microorganism containing said nitrilase.Type: GrantFiled: December 2, 1988Date of Patent: August 20, 1991Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Kiyoshi Nakayama, Haruo Honda, Yukie Ogawa, Tetsuo Ohta, Tatsuya Ozawa
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Patent number: 4918012Abstract: This invention relates to a method for producing carnitine comprising contacting, in a reaction medium, carnitinamide with (A) an amidase capable of hydrolyzing carnitinamide to form carnitine or (B) a microorganism containing said amidase, carnitinamide hydrolase and a method for producing same.Type: GrantFiled: August 26, 1987Date of Patent: April 17, 1990Assignee: Kyowa Hakko Kogyo Co., Ltd.Inventors: Kiyoshi Nakayama, Haruo Honda, Yukie Ogawa, Tatsuya Ozawa, Tetsuo Ohta
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Patent number: 3966903Abstract: A hair-waving composition which comprises (A) at least one main waving agent selected from sulfites and bisulfites and (B) at least one wave accelerating agent selected from alkylene carbonates of the general formula: ##EQU1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each stand independently for hydrogen atom, methyl group, ethyl group, hydroxyethyl group or hydroxy methyl group, alkyl carbamates of the general formula: ##EQU2## wherein R.sub.1, R.sub.2 and R.sub.3 each stand independently for hydrogen atom, methyl group, ethyl group or propyl group, and .gamma.- or .delta.-lactones of the general formula: ##EQU3## wherein R.sub.1, R.sub.2 and R.sub.3 each stand for hydrogen atom or methyl group, and n for an integer of 0 or 1. This composition can set strong permanent waves with greater safety within the pH range of human skin at a low temperature without any unpleasant odor.Type: GrantFiled: April 22, 1974Date of Patent: June 29, 1976Assignee: Shiseido Co., Ltd.Inventors: Kenji Torii, Tatsuya Ozawa, Kimio Ono, Koichi Iwabe, Hiroumi Horikawa