Patents by Inventor So Miyaishi

So Miyaishi 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: 20220251699
    Abstract: A corrosion-resistant member including: a metal base material (10); a corrosion-resistant coating (30) formed on the surface of the base material (10); and a buffer layer (20) formed between the base material (10) and the corrosion-resistant coating (30). The base material (10) contains a main element having the highest mass content ratio among elements contained in the base material (10) and a trace element having a mass content ratio of 1% by mass or less. The corrosion-resistant coating (30) contains at least one kind selected from magnesium fluoride, aluminum fluoride, and aluminum oxide. The buffer layer (20) contains an element of the same kind as the trace element, and the content ratio obtained by energy dispersive X-ray analysis of the element of the same kind as the trace element contained in the buffer layer (20) is 2% by mass or more and 99% by mass or less.
    Type: Application
    Filed: September 3, 2020
    Publication date: August 11, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Saori YAMAKI
  • Publication number: 20220243072
    Abstract: A corrosion-resistant member including: a metal base material (10); and a corrosion-resistant coating (30) formed on the surface of the base material (10). The corrosion-resistant coating (30) is a stack of a magnesium fluoride layer (31) and an aluminum fluoride layer (32) in order from the base material (10) side. The aluminum fluoride layer (32) has a first crystalline region (32A) and a second crystalline region (32B) containing crystalline aluminum fluoride. The first crystalline region (32A) is a region in which diffraction spot arrays having regularity are observed in an electron beam diffraction image obtained by irradiation with electron beams having a beam diameter of 10 nm to 20 nm. The second crystalline region (32B) is a region in which a plurality of diffraction spots is observed but diffraction spot arrays having regularity are not observed in an electron beam diffraction image obtained by irradiation with the above-described electron beams.
    Type: Application
    Filed: February 24, 2021
    Publication date: August 4, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Saori YAMAKI
  • Publication number: 20220195605
    Abstract: A corrosion-resistant member including: a metal base material (10); and a corrosion-resistant coating (30) formed on the surface of the base material (10). The corrosion-resistant coating (30) is a stack of a magnesium fluoride layer (31) and an aluminum fluoride layer (32) in order from the base material (10) side. The aluminum fluoride layer (32) is a stack of a first crystalline layer (32A) containing crystalline aluminum fluoride, an amorphous layer (32B) containing amorphous aluminum fluoride, and a second crystalline layer (32C) containing crystalline aluminum fluoride in order from the magnesium fluoride layer (31) side. The first crystalline layer (32A) and the second crystalline layer (32C) are layers in which diffraction spots are observed in electron beam diffraction images obtained by electron beam irradiation and the amorphous layer (32B) is a layer in which a halo pattern is observed in an electron beam diffraction image obtained by electron beam irradiation.
    Type: Application
    Filed: September 3, 2020
    Publication date: June 23, 2022
    Applicant: SHOWA DENKO K.K.
    Inventors: So MIYAISHI, Masahiro OKUBO, Masayuki YOSHIMURA, Wataru SAKANE, Teppei TANAKA, Saeko NAKAMURA, Saori YAMAKI
  • Patent number: 11041102
    Abstract: An alumina sintered body including an inner layer in which alumina crystal grains contained have an average aspect ratio of 1.0 to 2.0 and an outer layer which covers at least a part of the inner layer from outside and in which alumina crystal grains contained have an average aspect ratio of more than 2.0, the alumina sintered body being free from silicon except unavoidable impurities.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: June 22, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: So Miyaishi
  • Patent number: 10941077
    Abstract: A method for producing an alumina sintered body, including: a step of applying an alkaline earth metal compound onto a surface of an alumina raw material which is an unsintered alumina compact or an alumina sintered body; and a step of subjecting the alumina raw material to which the alkaline earth metal compound has been applied to heat treatment at a temperature of 1200° C. or more for 5 minutes or more and 300 minutes or less.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: March 9, 2021
    Assignee: SHOWA DENKO K.K.
    Inventor: So Miyaishi
  • Publication number: 20200392044
    Abstract: A method for producing an alumina sintered body, including: a step of applying an alkaline earth metal compound onto a surface of an alumina raw material which is an unsintered alumina compact or an alumina sintered body; and a step of subjecting the alumina raw material to which the alkaline earth metal compound has been applied to heat treatment at a temperature of 1200° C. or more for 5 minutes or more and 300 minutes or less.
    Type: Application
    Filed: December 19, 2018
    Publication date: December 17, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: So MIYAISHI
  • Publication number: 20200339849
    Abstract: An alumina sintered body including an inner layer in which alumina crystal grains contained have an average aspect ratio of 1.0 to 2.0 and an outer layer which covers at least a part of the inner layer from outside and in which alumina crystal grains contained have an average aspect ratio of more than 2.0, the alumina sintered body being free from silicon except unavoidable impurities.
    Type: Application
    Filed: December 19, 2018
    Publication date: October 29, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: So MIYAISHI
  • Publication number: 20200308056
    Abstract: A precursor of an alumina sintered compact including aluminum, yttrium, and at least one metal selected from iron, zinc, cobalt, manganese, copper, niobium, antimony, tungsten, silver, and gallium. The aluminum content is 98.0% by mass or more as an oxide (Al2O3) in 100% by mass of the precursor of an alumina sintered compact; the yttrium content is 0.01 to 1.35 parts by mass as an oxide (Y2O3) based on 100 parts by mass of the content of the aluminum as an oxide; the total content of the metals selected from the foregoing group is 0.02 to 1.55 parts by mass as an oxide based on 100 parts by mass of the content of aluminum as an oxide; and the aluminum is contained as ?-alumina. Also disclosed is an alumina sintered compact, and a method for producing an alumina sintered compact and for producing abrasive grains.
    Type: Application
    Filed: December 25, 2018
    Publication date: October 1, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: So MIYAISHI, Satoshi IINOU
  • Publication number: 20200239369
    Abstract: Provided are electrofused alumina grains capable of preventing grain binding on production and of achieving high grinding performance. The electrofused alumina grains of the present invention contain at least either one of tungsten or molybdenum.
    Type: Application
    Filed: October 25, 2018
    Publication date: July 30, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: So MIYAISHI, Kazuaki TAKANO, Satoshi YAMAOKA
  • Patent number: 10710213
    Abstract: To provide an alumina sintered body, abrasive grains, and a grinding wheel having high hardness and excellent wear resistance. An alumina sintered body comprising: an inner layer comprising alumina crystal grains; and an outer layer covering at least a part of the inner layer from outside, having a higher content of an alkaline earth metal than the inner layer, and comprising alumina crystal grains, wherein the content of the alkaline earth metal in the outer layer is 1.0 to 30.0 mass % in terms of oxide, the alumina sintered body being free from silicon except unavoidable impurities.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: July 14, 2020
    Assignee: SHOWA DENKO K.K.
    Inventor: So Miyaishi
  • Publication number: 20200001432
    Abstract: To provide an alumina sintered body, abrasive grains, and a grinding wheel having high hardness and excellent wear resistance. An alumina sintered body comprising: an inner layer comprising alumina crystal grains; and an outer layer covering at least a part of the inner layer from outside, having a higher content of an alkaline earth metal than the inner layer, and comprising alumina crystal grains, wherein the content of the alkaline earth metal in the outer layer is 1.0 to 30.0 mass % in terms of oxide, the alumina sintered body being free from silicon except unavoidable impurities.
    Type: Application
    Filed: December 19, 2018
    Publication date: January 2, 2020
    Applicant: SHOWA DENKO K.K.
    Inventor: So MIYAISHI
  • Publication number: 20190284462
    Abstract: Provided are electrofused alumina grains excellent in grinding performance and a production method of such electrofused alumina grains, and a grinding stone and a coated abrasive using the electrofused alumina grains. The electrofused alumina grains of the present invention contain titanium and magnesium. The production method for the electrofused alumina grains includes the steps of: preparing a mixture material by mixing an alumina material, a titanium compound and a magnesium compound, forming an ingot from the mixture material according to an electrofusing process, grinding the ingot to prepare a ground powder, size-regulating the ground powder to have a predetermined grain size to prepare size-regulated grains, and heating the size-regulated grains at a heating temperature of 1,000° C. or higher to give electrofused alumina grains. The grinding stone contains the electrofused alumina grains. The coated abrasive contains the electrofused alumina grains.
    Type: Application
    Filed: June 22, 2017
    Publication date: September 19, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Satoshi YAMAOKA, So MIYAISHI, Shinichiro TOMIKAWA
  • Patent number: 9516881
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, and at least one divalent copper compound represented by the following formula (1). The Cu- and Ti-containing composition production method of the present invention is characterized by including stirring a mixture containing titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, a divalent copper compound raw material represented by formula (2), water, and an alkaline compound, to thereby cause precipitation. The composition of the present invention exhibits excellent anti-viral property under light and in the dark, and excellent organic compound decomposition activity under light.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 13, 2016
    Assignee: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li
  • Patent number: 9210939
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide including rutile-crystal-type titanium oxide, and a divalent copper compound, wherein the rutile-crystal-type titanium oxide exhibits the most intense diffraction peak attributed to rutile-type titanium oxide having a full width at half maximum of 0.65° or less, in a Cu—K? line X-ray diffraction pattern, which is obtained by plotting intensity of diffraction line with respect to diffraction angle 2?. The composition exhibits excellent anti-viral property under light and in the dark, and excellent organic compound degradability under light.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: December 15, 2015
    Assignee: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li
  • Publication number: 20140322353
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, and at least one divalent copper compound represented by the following formula (1). The Cu- and Ti-containing composition production method of the present invention is characterized by including stirring a mixture containing titanium oxide having a rutile-type titanium oxide content of 15 mol % or more, a divalent copper compound raw material represented by formula (2), water, and an alkaline compound, to thereby cause precipitation. The composition of the present invention exhibits excellent anti-viral property under light and in the dark, and excellent organic compound decomposition activity under light.
    Type: Application
    Filed: December 17, 2012
    Publication date: October 30, 2014
    Applicant: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroda, Yasuhiro Hosogi, Ding Li
  • Publication number: 20140294989
    Abstract: The Cu- and Ti-containing composition of the present invention contains titanium oxide including rutile-crystal-type titanium oxide, and a divalent copper compound, wherein the rutile-crystal-type titanium oxide exhibits the most intense diffraction peak attributed to rutile-type titanium oxide having a full width at half maximum of 0.65° or less, in a Cu—K? line X-ray diffraction pattern, which is obtained by plotting intensity of diffraction line with respect to diffraction angle 2?. The composition exhibits excellent anti-viral property under light and in the dark, and excellent organic compound degradability under light.
    Type: Application
    Filed: December 17, 2012
    Publication date: October 2, 2014
    Applicant: SHOWA DENKO K.K.
    Inventors: So Miyaishi, Yasushi Kuroka, Yasuhiro Hosogi, Ding Li