Patents by Inventor Hisayoshi Yoshida
Hisayoshi Yoshida 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: 20240086636Abstract: According to an embodiment, a keyword detection device includes a memory and one or more processors coupled to the memory. The one or more processors are configured to: detect a phrase related to a keyword from text information that is a recognition result of input information represented in a predetermined input form; calculate output similarities conforming to similarities between the phrase and the keywords included in a keyword list in which, for each of a plurality of the keywords, keyword notation of the corresponding keyword is associated with keyword form information representing the corresponding keyword in an input form; and output the keywords in the keyword list according to the output similarities.Type: ApplicationFiled: February 17, 2023Publication date: March 14, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuka KOBAYASHI, Takami YOSHIDA, Kenji IWATA, Tsuyoshi KUSHIMA, Hisayoshi NAGAE, Nayuko WATANABE
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Patent number: 5063184Abstract: A pressureless sintered body of boron nitride contains more than 95 wt% of boron nitride. The pressureless sintered body hexagonal of boron nitride has a density of not less than 1.10 g/cm.sup.3 and a bending strength of not less than 300 kg/cm.sup.2. A process of producing the pressureless sintered body of boron nitride comprises pulverizing powders of starting feed boron nitride so that a specific surface area of each of the powders is two times or more than that of the starting feed boron nitride powder, molding the thus pulverized powders to obtain a pre-molded body and sintering the pre-molded body at a temperature of not less than 1400.degree. C. under atmospheric pressure and under non-oxidative atmosphere.Type: GrantFiled: March 27, 1990Date of Patent: November 5, 1991Assignees: Agency of Industrial Science and Technology, Denki Kagaku Kogyo Kabushiki KaishaInventors: Hagio Tsuyoshi, Kazuo Kobayashi, Hisayoshi Yoshida, Ichitaro Ogawa, Hiroshi Harada, Hiroaki Yasunaga, Hiroshi Nishikawa
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Patent number: 4788168Abstract: Described herein is a method for producing a carbon-ceramic composite material, which is characterized by firing a ground powder mixture of low temperature coke and a ceramic material in a non-oxidizing atmosphere at a temperature higher than 800.degree. C., inclusive, and lower than an inceptive sintering temperature of the ceramic material, prior to shaping and sintering stages.Type: GrantFiled: June 20, 1986Date of Patent: November 29, 1988Assignee: Agency of Industrial Science and TechnologyInventors: Ichitaro Ogawa, Hisayoshi Yoshida, Kazuo Kobayashi
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Patent number: 4720349Abstract: Disclosed herein is a high temperature-resistant and abrasion-resistant sliding member of graphite-metal borides showing a friction coefficient of 0.01 to 0.09 and a specific amount of abrasion of 1.0 to 4.0.times.10.sup.-8 mm.sup.2 /kg under the measuring conditions of a load of 20 kg/cm.sup.2 and a sliding velocity of 5 m/min at an atmosphere temperature of 300.degree. C., a bending strength of 230 to 900 kg.f/cm.sup.2 and a Shore hardness of 28 to 45, produced by sintering (a) 70 to 93% by weight of amorphous carbon powder, (b) 5 to 20% by weight of at least one boride of a metal of IVa group, Va group of VIa group of the periodic table and (c) 2 to 10% by weight of powdery natural graphite, powdery Kish graphite or a mixture thereof.Type: GrantFiled: November 4, 1985Date of Patent: January 19, 1988Assignees: The Agency of Industrial Science and Technology, Oiles Industry Co. Ltd.Inventors: Kazuo Kobayashi, Kenji Miyazaki, Tsuyoshi Hagio, Ichitaro Ogawa, Hisayoshi Yoshida, Kazutsugu Kashima, Takashi Tada, Youichirou Hayashi, Wataru Abe
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Patent number: 4637884Abstract: Disclosed herein is a high temperature-resistant and abrasion-resistant sliding member of graphite-boron carbides showing the friction coefficient of 0.01 to 0.13 and the specific abrasion amount of 10.sup.-7 to 10.sup.-9 mm.sup.2 /kg under the measuring conditions of the load of 20 kg/cm.sup.2 and the sliding velocity of 5 m/min at a temperature of 300.degree. C., the bending strength of 300 to 1600 kg.f/cm.sup.2 and the Shore hardness of from 45 to 60, obtained by mixing and stirring from 65 to 95% by weight of powdery carbon of an average particle size of 10 to 150 .mu.m and from 5 to 35% by weight of powdery boron carbide of an average particle size of 0.5 to 2.5 .mu.m until the powdery boron carbide is uniformly dispersed in the powdery carbon, and sintering the thus formed mixture at a temperature of 2020.degree. C. or more and less than the transition point at which the structure of carbon and boron carbide in the thus formed mixture is remarkably changed, under a pressure of 100-250 kg/cm.sup.2.Type: GrantFiled: July 17, 1985Date of Patent: January 20, 1987Assignees: Agency of Industrial Science and Technology, Oiles Industry Co., LTDInventors: Kenji Miyazaki, Tsuyoshi Hagio, Ichitaro Ogawa, Hisayoshi Yoshida, Kazuo Kobayashi, Kazutsugu Kashima, Takashi Tada, Yoichiro Hayashi, Wataru Abe
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Patent number: 4607959Abstract: Disclosed herein is a heat resistant vaned stirrer for use in a high temperature atmosphere. To endure stirring operations in high temperature molten metals of 300.degree.-1200.degree. C., the stirrer vanes are formed of a carbon-ceramics composite material which is produced from coke powder blended with 10-50% by volume of ceramics powder and which has a bending strength higher than 200 kg/cm.Type: GrantFiled: November 30, 1984Date of Patent: August 26, 1986Assignee: Agency of Industrial Science and TechnologyInventors: Kenji Miyazaki, Ichitaro Ogawa, Hisayoshi Yoshida, Kazuo Kobayashi, Tsuyoshi Hagio, Hidetoshi Ueno, Shigeru Akiyama
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Patent number: 4518702Abstract: The carbonaceous body of the invention is prepared by shaping and sintering uniform powdery mixture composed of a powder of a low-temperature coke, a powder of boron carbide and a powder of silicon carbide in such a proportion that the weight proportion of the boron carbide and the silicon carbide is in the range from 2:98 to 80:20 and the volume proportion of the coke powder and the combination of the boron carbide and silicon carbide is in the range from 50:50 to 95:5. The carbonaceous body thus obtained is highly resistant against air oxidation even at a temperature of 1400.degree. C. in addition to the outstandingly high mechanical strengths in comparison with conventional carbonaceous shaped materials such as artificial graphite.Type: GrantFiled: January 16, 1984Date of Patent: May 21, 1985Assignee: Director-General of the Agency of Industrial Science and TechnologyInventors: Hisayoshi Yoshida, Ichitaro Ogawa, Tsuyoshi Hagio, Kazuo Kobayashi, Takayoshi Yamamoto
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Patent number: 3932494Abstract: The compound thiohumic acid resulting from replacing at least a part of the carboxyl groups in humic acid by thiocarboxyl groups, i.e., ##EQU1## as well as a heavy metal adsorbent containing thiohumic acid as its active ingredient. This new compound is obtained by treating humic acid with a halogenating agent to form humic acid halide and treating such halide with a thiolating agent.Type: GrantFiled: December 20, 1973Date of Patent: January 13, 1976Assignee: Director-General of the Agency of Industrial Science and TechnologyInventors: Hisayoshi Yoshida, Takato Nakamura, Masanao Nakagawa, Seiji Arita, Toshiharu Miki