Patents by Inventor Takeshi Sakurai
Takeshi Sakurai 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: 5545240Abstract: Deodorant comprising 5 to 100% by weight of a calcium phosphate compound having a molar ratio of Ca/P of 0.8 to 2.0, a deodorant sheet and filter sheet containing such calcium phosphate compound, and a functional paper containing 10 to 80% by weight of a calcium phosphate compound. A filtering medium for an exhaust gas comprises a ceramic material containing 5 to 100% by weight of a calcium phosphate compound, as well as a filter cartridge and exhaust gas filter containing the filtering medium. Based on the excellent properties of the incorporated calcium phosphate compound, the agents and products according to the present invention exhibit a highly improved adsorptivity to oil-soluble substances, odor substances, animal or vegetable cells, viruses, biopolymeric substances or other substances, and therefore can be advantageously used in various fields of technology. For example, the functional paper can be used as a deodorant, filter medium and adsorbent as well as a flame-retardant paper.Type: GrantFiled: February 14, 1995Date of Patent: August 13, 1996Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Sumiaki Tsuru, Akihiko Yokoo, Takeshi Sakurai, Tetsuro Ogawa
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Patent number: 5468724Abstract: Disclosed herein are high-temperature oxide superconductors of RBa.sub.2 Cu.sub.4 O.sub.8 type, with Ba partly replaced by Sr or Ca, or with R and Ba partly replaced by Ca and Sr, respectively, as represented by the chemical composition formula of R(Ba.sub.1-y Sr.sub.y).sub.2 Cu.sub.4 O.sub.8 or R(Ba.sub.1-z Ca.sub.z).sub.2 Cu.sub.4 O.sub.8 or (R.sub.1-x Ca.sub.x) (Ba.sub.1-y Sr.sub.y).sub.2 Cu.sub.4 O.sub.8. They exhibit superconductivity at high temperatures. Especially, the last one exhibits superconductivity at a higher temperature than the former two. All of them can be made with a less amount of Ba as a deleterious substance, and the first two have improved sinterability. The best results are obtained when they are produced by the process involving the hot hydrostatic pressure treatment of the mixture of raw materials at 850.degree.-1100.degree. C. in an atmosphere composed of an inert gas and oxygen. The process permits a wider selection of Ba raw materials.Type: GrantFiled: May 27, 1993Date of Patent: November 21, 1995Assignees: International Superconductivity Technology Center, Matsushita Electric Industrial Co., Ltd., Kyocera Corporation, Mitsubishi Metal Corporation, The Tokyo Electric Power Company, Incorporated, Kabushiki Kaisha Kobe Seiko ShoInventors: Takahiro Wada, Shin-ichi Koriyama, Takeshi Sakurai, Nobuo Suzuki, Takayuki Miyatake, Hisao Yamauchi, Naoki Koshizuka, Shoji Tanaka
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Patent number: 5445252Abstract: A charging cord for supplying electric current to an electric power storing device of an electric vehicle includes an electrical cable having a first end and a second end, the first end being operatively connected to the electric power storing device and the second end being adapted to be connected to an electrical power supply. A housing is provided for supporting the electrical cable along a predetermined length thereof. The housing includes a plurality of section members pivotally connected relative to each other for permitting limited lateral motion in a single plane to maintain the charging cord a predetermined distance above the ground surface.Type: GrantFiled: July 25, 1994Date of Patent: August 29, 1995Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Thomas S. McKee, Takeshi Sakurai
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Patent number: 5446017Abstract: A superconductive oxide material having an infinite layer structure and having the following formula:A.sub.p B.sub.q Cu.sub.2 O.sub.4.+-.rwherein A and B are different and each represent an element selected from lanthanoid elements and elements belonging to Groups IA, IIA and IIIA of the Periodic Table, p is between 0.9 and 1.1, q is between 0.9 and 1.1 and r is between 0 and 0.6. The oxide material has a crystal structure belonging to a tetragonal system of P4/mmm and 1-123 having the following lattice parameters:3.8.ANG..ltoreq.a.ltoreq.4.0.ANG.7.6.ANG..ltoreq.c.ltoreq.8.0.ANG.or to an orthorhombic system of Pmmm and I-47 having the following lattice parmeters:3.8.ANG..ltoreq.a.ltoreq.3.95.ANG.3.82.ANG..ltoreq.b.ltoreq.4.0.ANG.7.6.ANG..ltoreq.c.ltoreq.8.0.ANG..Type: GrantFiled: April 12, 1993Date of Patent: August 29, 1995Assignees: Central Research Institute of Electric Power Industry, Tohoku Electric Power Co., Inc., International Superconductivity Technology CenterInventors: Takeshi Sakurai, Nobuyuki Sugii, Seiji Adachi, Michiharu Ichikawa, Yuji Yaegashi, Hisao Yamauchi, Masahiko Shimada, Hirotsugu Takizawa
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Patent number: 5365444Abstract: A method of and an apparatus for estimating a vehicle velocity, which are suitable for use in a vehicle. Velocities of drive wheels and follower wheels of the vehicle are determined and the fastest one of the so-determined velocities is selected. The velocity of the vehicle is estimated based on the fastest wheel velocity thus selected. The above respective processes are repeatedly executed at given time intervals. Thus, when the estimated vehicle velocity is faster than each of the velocities of the follower wheels and lower than the fastest wheel velocity, the estimated vehicle velocity determined immediately before the above estimating process is set as a desired estimated vehicle velocity. Accordingly, a high-accuracy estimated vehicle velocity corresponding to an actual vehicle velocity can be obtained, thereby making it possible to control brakes and driving forces with high accuracy using the estimated vehicle velocity.Type: GrantFiled: October 8, 1992Date of Patent: November 15, 1994Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Osamu Suzuki, Keishin Tanaka, Tatsuo Hayashi, Takushi Matsuto, Chiaki Kumagai, Takeshi Sakurai, Atsuo Ota
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Patent number: 5318745Abstract: A method of manufacturing an oxide superconductor having a composition expressed by formula La.sub.2-X Sr.sub.X CaCu.sub.2 O.sub.6 (0<X.ltoreq.0.6), comprising the steps of: preliminarily burning a raw powder having a predetermined composition, and sintering the powder to obtain a sintered body; and subjecting the sintered body to hot isostatic pressing at a temperature falling within a range of from 940.degree.-1600.degree. C. under total pressure of 10 MPa or more and oxygen partial pressure of 2 MPa or more. By virtue of the step of subjecting the sintered body to hot isostatic pressing, a superconductor can be manufactured at a temperature and under a pressure within respective wide ranges. Further, the composition of the superconductor can be selected within a wide range of 0<X.ltoreq.0.6. Moreover, the superconductor can be manufactured by performing quenching after the hot isostatic pressing.Type: GrantFiled: July 8, 1992Date of Patent: June 7, 1994Assignees: International Superconductivity Technology Center, Mitsubishi Materials Corporation, Hitachi, Ltd.Inventors: Takeshi Sakurai, Toru Yamashita, Hisao Yamauchi, Shoji Tanaka
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Patent number: 5310548Abstract: Deodorant comprising 5 to 100% by weight of a calcium phosphate compound having a molar ratio of Ca/P of 0.8 to 2.0, a deodorant sheet and filter sheet containing such calcium phosphate compound, and a functional paper containing 10 to 80% by weight of a calcium phosphate compound. A filtering medium for an exhaust gas comprises a ceramic material containing 5 to 100% by weight of a calcium phosphate compound, as well as a filter cartridge and exhaust gas filter containing the filtering medium. Based on the excellent properties of the incorporated calcium phosphate compound, the agents and products according to the present invention exhibit a highly improved adsorptivity to oil-soluble substances, odor substances, animal or vegetable cells, viruses, biopolymeric substances or other substances, and therefore can be advantageously used in various fields of technology. For example, the functional paper can be used as a deodorant, filter medium and adsorbent as well as a flame-retardant paper.Type: GrantFiled: February 26, 1992Date of Patent: May 10, 1994Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Sumiaki Tsuru, Akihiko Yokoo, Takeshi Sakurai, Tetsuro Ogawa
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Patent number: 5244871Abstract: An oxide superconductor comprises a composition represented by the composition formula: (Nd.sub.x --Ce.sub.y --L.sub.z).sub.2 CuO.sub.4-d (wherein L is an element selected from Ca and Mg, and x+y+z=1). The compositions of Nd, Ce and L of the oxide superconductor corresponds to a point falling inside an area of Nd--Ce--L ternary diagram surrounded by straight lines (A-B), (B-C), (C-D) and (D-A) connecting point (A) with point (B), point (B) with point (C), point (C) with point (D) and point (D) with point (A), respectively, the points (A), (B), (C) and (D) being points (x=1, y=0, z=0), (x=0.4, y=0.6, z=0), (x=0.4, y=0.3, z=0.3) and (x=0.1, y=0, z=0.9), respectively, in the Nd--Ce--L ternary diagram. Above-described Nd--Ce--L--Cu--O oxides can exhibit superconductivity within a wide range of composition when heat-treated in an atmosphere of nitrogen.Type: GrantFiled: October 9, 1991Date of Patent: September 14, 1993Assignees: Mitsubishi Metal Corporation, Hitachi, Ltd., International Superconductivity Technology CenterInventors: Takeshi Sakurai, Toru Yamashita, Hisao Yamauchi, Shoji Tanaka
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Patent number: 5236889Abstract: 1. In the (Bi,Tl)-Ca-(Sr,Ba)-Cu-O based superconducting ceramics production process, a process for preparing superconducting ceramics characterized by(a) providing powders includingi) a compound of Bi oxide or Tl oxide,ii) a Ca compound,iii) an Sr compound or Ba compound, andiv) a Cu compoundas starting powders;(b) compounding and mixing powders from compounds of the starting powders, the compounds each having lower vapor pressure, i.e., powders from compound ii), compound iii), and compound iv) at a compounding ratio to obtain a mixture, and primarily calcining the mixture at a temperature of 850.degree. to 1050.degree. C., to form a Ca--(Sr,Ba)--Cu--O based oxide; and(c) further mixing the Ca--(Sr,Ba)--Cu--O based oxide with a compound having a higher vapor pressure, that is, the powder of compound i), at a compounding ratio, and secondarily calcining at a temperature of 500.degree. to 820.degree. C.Type: GrantFiled: November 27, 1989Date of Patent: August 17, 1993Assignee: Mitsubishi Materials CorporationInventors: Tadashi Sugihara, Takuo Takeshita, Yukihiro Ouchi, Takeshi Sakurai
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Patent number: 5169830Abstract: A superconductive material is disclosed which has the following composition:(R.sub.1-x Ca.sub.x)(Ba.sub.1-y La.sub.y).sub.2 Cu.sub.4 O.sub.8wherein R is at least one element selected from Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, x is a number in the range of 0-0.3 and y is a number in the range of 0.001-0.3 with the proviso that y is not greater than 0.2 when x is not 0.Type: GrantFiled: August 15, 1990Date of Patent: December 8, 1992Assignees: Internationnal Superconductivity Technology Center, Mitsubushi Metal Corporation, Kyocera Corporation, The Tokyo Electric Power CompanyInventors: Takahiro Wada, Shinichi Koriyama, Takeshi Sakurai, Nobuo Suzuki, Takayuki Miyatake, Hisao Yamauchi, Naoki Koshizuka, Shoji Tanaka
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Patent number: 4582561Abstract: A silicon carbide seed layer is first formed on a (111) major surface of a silicon substrate through the use of the conventional chemical vapor deposition method. The silicon carbide seed layer includes a first surface confronting the silicon substrate. The first surface shows a predetermined grain alignment oriented with the (111) major surface of the silicon substrate even though the deposition is carried out at a temperature below the melting point of the silicon substrate. Then, the silicon substrate is melted so that the first surface of the silicon carbide seed layer is exposed to the molten silicon including a carbon source therein. In this way, a second silicon carbide layer is formed on the first surface of the silicon carbide seed layer through the use of a liquid-phase epitaxial growth method.Type: GrantFiled: April 19, 1982Date of Patent: April 15, 1986Assignee: Sharp Kabushiki KaishaInventors: Toshinori Ioku, Takeshi Sakurai
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Patent number: 4557369Abstract: A moving staircase is disclosed wherein along the circulating path of a number of conventional tread boards thereof which are articulated together in an endless fashion at least one pair of specifically constituted tread boards are disposed between any two conventional tread boards so as to be articulated thereto. The specifically constituted tread boards each have substantially the same configuration as that of the conventional tread board and are articulated one behind the other in the circulating direction of the conventional tread boards. The rear one is provided with a movable footboard so as to be moved up and down relative thereto, the movable footboard being adapted to be normally locked to the rear one of the specifically constituted tread boards by a lock means provided therein.Type: GrantFiled: June 29, 1984Date of Patent: December 10, 1985Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Matsuhiko Ishida, Masaru Asano, Shigeru Goto, Takeshi Sakurai
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Patent number: H1003Abstract: An improved process for producing a photographic material in which an assembly of superposed liquid photographic layers is coated onto the surface of a moving base support in such a way that the properties of the liquid photographic layers being coated are evaluated by their dynamic surface tensions.Type: GrantFiled: February 15, 1990Date of Patent: December 3, 1991Inventors: Masao Ishiwata, Norio Kawame, Takeshi Sakurai, Mieji Nakano, Kazuhide Tamazawa, Nobuyuki Kimura, Toshio Saito, Gentaro Hada