Patents by Inventor Masaya Yukinobu

Masaya Yukinobu 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).

  • Patent number: 10850330
    Abstract: A process for producing nickel powder capable of obtaining inexpensive, and also, high-performance nickel powder, even when using wet process. A process for producing nickel powder, including a crystallization step for obtaining nickel crystal powder by reductive reaction in reaction solution in which at least water-soluble nickel salt, metal salt of metal more noble than nickel, reducing agent, alkali hydroxide, amine compound, and water are mixed, wherein the reducing agent to be mixed in the crystallization step is hydrazine, the amine compound is autolysis inhibitor of hydrazine, and contains two or more primary amino groups in molecule, or contains one primary amino group and one or more secondary amino groups in molecule, and ratio of molar number of the amine compound with respect to molar number of nickel in the reaction solution is in a range of 0.01 mol % to 5 mol %.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: December 1, 2020
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Junji Ishii, Hiroyuki Tanaka, Shingo Murakami, Yuki Kumagai, Masaya Yukinobu, Yoshiaki Matsumura
  • Publication number: 20190388974
    Abstract: A process for producing nickel powder capable of obtaining fine nickel powder in wet process and capable of decreasing content of impurities by medicament used in crystallization of nickel powder. A process for producing nickel powder, including a crystallization step for obtaining nickel crystal powder by reduction reaction in reaction solution in which water-soluble nickel salt, alkali hydroxide and the sulfur-containing compound is a compound having any of sulfur-containing functional group structure represented by —SH, sulfur-containing functional group structure represented by —S—S—, sulfur-containing functional group structure, and a ratio of substance quantity of the sulfur-containing compound and nickel in the reaction solution, a multiplication factor of the sulfur-containing functional group of the sulfur-containing compound, and a ratio of substance quantity of the metal salt of metal more noble than nickel and nickel is in a range of 0.1?A*B?0.75C+30 (0?C?100).
    Type: Application
    Filed: December 5, 2017
    Publication date: December 26, 2019
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Junji ISHII, Hiroyuki TANAKA, Masaya YUKINOBU
  • Patent number: 10283230
    Abstract: Provided is a method for producing a coating liquid for forming a transparent conductive film, capable of forming a transparent conductive film having excellent transparency and electrical conductivity using a wet-coating method. Disclosed is the method for producing a coating liquid for forming a transparent conductive film, the method including a heating and dissolution step and a dilution step, in which the conditions for heating and dissolution/reaction of the heating and dissolution step are such that the heating temperature is in the range of 130° C.?T?180° C., and the heating time is in the range shown in FIG. 1.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: May 7, 2019
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yoshihiro Otsuka, Yuki Murayama
  • Publication number: 20190084040
    Abstract: To provide a fine nickel powder for an internal electrode paste of an electronic component, the nickel powder obtained by a wet method and having high crystallinity, excellent sintering characteristics, and heat-shrinking characteristics. The nickel powder is obtained by precipitating nickel by a reduction reaction in a reaction solution including at least water-soluble nickel salt, salt of metal nobler than nickel, hydrazine as a reducing agent, and alkali metal hydroxide as a pH adjusting agent and water; the reaction solution is prepared by mixing a nickel salt solution including the water-soluble nickel salt and the salt of metal nobler than nickel with a mixed reducing agent solution including hydrazine and alkali metal hydroxide; and the hydrazine is additionally added to the reaction solution after a reduction reaction initiates in the reaction solution.
    Type: Application
    Filed: March 14, 2017
    Publication date: March 21, 2019
    Inventors: Junji ISHII, Shingo MURAKAMI, Hiroyuki TANAKA, Takahiro KAMATA, Toshiaki TERAO, Masaya YUKINOBU, Yuji WATANABE, Tsutomu TANIMITSU, Yoshiyuki KUNIFUSA, Haruo NISHIYAMA
  • Publication number: 20180304375
    Abstract: A process for producing nickel powder capable of obtaining inexpensive, and also, high-performance nickel powder, even when using wet process. A process for producing nickel powder, including a crystallization step for obtaining nickel crystal powder by reductive reaction in reaction solution in which at least water-soluble nickel salt, metal salt of metal more noble than nickel, reducing agent, alkali hydroxide, amine compound, and water are mixed, wherein the reducing agent to be mixed in the crystallization step is hydrazine, the amine compound is autolysis inhibitor of hydrazine, and contains two or more primary amino groups in molecule, or contains one primary amino group and one or more secondary amino groups in molecule, and ratio of molar number of the amine compound with respect to molar number of nickel in the reaction solution is in a range of 0.01 mol % to 5 mol %.
    Type: Application
    Filed: October 14, 2016
    Publication date: October 25, 2018
    Applicant: SUMITOMO METAL MINING CO., LTD.
    Inventors: Junji ISHII, Hiroyuki TANAKA, Shingo MURAKAMI, Yuki KUMAGAI, Masaya YUKINOBU, Yoshiaki MATSUMURA
  • Patent number: 9701849
    Abstract: By using a coating method, which is a simple method of manufacturing a transparent conductive film at low cost, a transparent conductive film formed with heating at a low temperature, in particular, lower than 300° C. with both of excellent transparency and conductivity and also with excellent film strength and a method of manufacturing this transparent conductive film are provided.
    Type: Grant
    Filed: February 15, 2011
    Date of Patent: July 11, 2017
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Masaya Yukinobu, Takahito Nagano, Yoshihiro Otsuka
  • Patent number: 9627680
    Abstract: Provided is a method for producing surface-treated oxide particles which can be used in an active-material layer for a positive electrode or a negative electrode in a storage battery. Oxide particles in which an alkaline compound is contained in a part or the whole area of the surface of each of the particles are brought into contact with a gas containing a volatile acidic compound to produce a neutralization product by a gas phase reaction, thereby producing surface-treated oxide particles in which the neutralization product is contained. The alkaline compound comprises at least one compound selected from compounds respectively containing lithium (Li), sodium (Na) and magnesium (Mg), the volatile acidic compound comprises at least one compound selected from compounds respectively containing boron (B), phosphorus (P) and silicon (Si), and the oxide particles comprise an alkali-composited oxide containing at least one transition metal selected from manganese, cobalt, nickel, iron and titanium.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: April 18, 2017
    Assignee: SUMITOMO METAL MINING CO., LTD.
    Inventors: Masaya Yukinobu, Yoshihiro Otsuka
  • Publication number: 20160301063
    Abstract: Provided is a method for producing surface-treated oxide particles which can be used in an active-material layer for a positive electrode or a negative electrode in a storage battery. Oxide particles in which an alkaline compound is contained in a part or the whole area of the surface of each of the particles are brought into contact with a gas containing a volatile acidic compound to produce a neutralization product by a gas phase reaction, thereby producing surface-treated oxide particles in which the neutralization product is contained. The alkaline compound comprises at least one compound selected from compounds respectively containing lithium (Li), sodium (Na) and magnesium (Mg), the volatile acidic compound comprises at least one compound selected from compounds respectively containing boron (B), phosphorus (P) and silicon (Si), and the oxide particles comprise an alkali-composited oxide containing at least one transition metal selected from manganese, cobalt, nickel, iron and titanium.
    Type: Application
    Filed: October 31, 2014
    Publication date: October 13, 2016
    Inventors: Masaya YUKINOBU, Yoshihiro OTSUKA
  • Publication number: 20150232674
    Abstract: Provided is a method for producing a coating liquid for forming a transparent conductive film, capable of forming a transparent conductive film having excellent transparency and electrical conductivity using a wet-coating method. Disclosed is the method for producing a coating liquid for forming a transparent conductive film, the method including a heating and dissolution step and a dilution step, in which the conditions for heating and dissolution/reaction of the heating and dissolution step are such that the heating temperature is in the range of 130° C.?T?180° C., and the heating time is in the range shown in FIG. 1.
    Type: Application
    Filed: August 9, 2013
    Publication date: August 20, 2015
    Inventors: Masaya Yukinobu, Yoshihiro Otsuka, Yuki Murayama
  • Patent number: 9040119
    Abstract: Provided is a method for producing a transparent conductive film which is formed via a coating step, a drying step and a baking step, wherein the baking step is characterized in that the dried coating film containing the organic metal compound as the main component is baked by being heated to a baking temperature or higher, at which at least the inorganic component is crystallized, under an oxygen-containing atmosphere having a dewpoint of ?10° C. or lower, whereby an organic component contained in the dried coating film is removed therefrom by a heat decomposition, a combustion or the combination thereof to thereby form a conductive oxide microparticle layer densely filled with conductive oxide microparticles containing the metal oxide as a main component.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: May 26, 2015
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yoshihiro Otsuka
  • Patent number: 8963146
    Abstract: By using a coating method, which is a method of manufacturing a transparent conductive film, with low-temperature heating lower than 300° C., a transparent conductive film with excellent transparency, conductivity, film strength, and resistance stability and a method of manufacturing this film are provided. In the method of manufacturing a transparent conductive film, a heat energy ray irradiating step is a step of irradiating with the energy rays while heating under an oxygen-containing atmosphere to a heating temperature lower than 300° C. to form the inorganic film, and the plasma processing step is a step of performing the plasma processing on the inorganic film under a non-oxidizing gas atmosphere at a substrate temperature lower than 300° C. to promote mineralization or crystallization of the film, thereby forming a conductive oxide fine-particle layer densely packed with conductive oxide fine particles having a metal oxide as a main component.
    Type: Grant
    Filed: November 5, 2010
    Date of Patent: February 24, 2015
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yuki Murayama, Takahito Nagano, Yoshihiro Otsuka
  • Patent number: 8753987
    Abstract: Provided is a method of manufacturing a metal oxide film to be formed through the following processes: a coating process of forming a coating film on a substrate by using a coating liquid for forming metal oxide film containing any of various organometallic compounds; a drying process of making the coating film into a dried coating film; and a heating process of forming an inorganic film from the dried coating film under an oxygen-containing atmosphere having a dew-point temperature equal to or lower than ?10° C.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: June 17, 2014
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yuki Murayama, Takahito Nagano, Yoshihiro Otsuka
  • Patent number: 8524786
    Abstract: A process for producing a fine silver particle colloidal dispersion which can simply form conductive silver layers and antimicrobial coatings by screen printing or the like. The process is characterized by having a reaction step of allowing an aqueous silver nitrate solution to react with a mixed solution of an aqueous iron(II) sulfate solution and an aqueous sodium citrate solution to form an agglomerate of fine silver particles, a filtration step of filtering the resultant agglomerate of fine silver particles to obtain a cake of the agglomerate of fine silver particles, a dispersion step of adding pure water to the cake to obtain a first fine silver particle colloidal dispersion of a water system in which dispersion the fine silver particles have been dispersed in the pure water, and a concentration and washing step of concentrating and washing the first fine silver particle colloidal dispersion of a water system.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: September 3, 2013
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Publication number: 20130101867
    Abstract: Provided is a method of manufacturing a metal oxide film to be formed through the following processes: a coating process of forming a coating film on a substrate by using a coating liquid for forming metal oxide film containing any of various organometallic compounds; a drying process of making the coating film into a dried coating film; and a heating process of forming an inorganic film from the dried coating film under an oxygen-containing atmosphere having a dew-point temperature equal to or lower than ?10° C.
    Type: Application
    Filed: June 8, 2011
    Publication date: April 25, 2013
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yuki Murayama, Takahito Nagano, Yoshihiro Otsuka
  • Patent number: 8388871
    Abstract: A translucent conductive film-forming coating liquid that can form a translucent conductive film having excellent translucency and conductivity together with organic solvent resistance includes conductive oxide acicular powder dispersed in a solvent containing a binder resin, the glass transition point (Tg) of the binder resin being 120° C. or more.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: March 5, 2013
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Kenji Kato, Masaya Yukinobu
  • Publication number: 20120313055
    Abstract: By using a coating method, which is a simple method of manufacturing a transparent conductive film at low cost, a transparent conductive film formed with heating at a low temperature, in particular, lower than 300° C. with both of excellent transparency and conductivity and also with excellent film strength and a method of manufacturing this transparent conductive film are provided.
    Type: Application
    Filed: February 15, 2011
    Publication date: December 13, 2012
    Applicant: SUMITOMO METAL MINING CO.LTD.
    Inventors: Masaya Yukinobu, Takahito Nagano, Yoshihiro Otsuka
  • Patent number: 8269416
    Abstract: A compressed multilayered film for a flexible functional element includes a base film, a transparent conductive layer coated on one side of the base film, and a support layer with a low adhesion layer liner on an opposite side of the base film. The support layer is separable from the base film. The base film has a thickness of 3 to 25 ?m, and the transparent conductive layer is composed mainly of conductive oxide microparticles and a binder matrix. The multilayered film is compressed to increase the filling density of the conductive microparticles in the transparent conductive layer.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: September 18, 2012
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Yuki Murayama, Masaya Yukinobu
  • Publication number: 20120223302
    Abstract: By using a coating method, which is a method of manufacturing a transparent conductive film, with low-temperature heating lower than 300° C., a transparent conductive film with excellent transparency, conductivity, film strength, and resistance stability and a method of manufacturing this film are provided. In the method of manufacturing a transparent conductive film, a heat energy ray irradiating step is a step of irradiating with the energy rays while heating under an oxygen-containing atmosphere to a heating temperature lower than 300° C. to form the inorganic film, and the plasma processing step is a step of performing the plasma processing on the inorganic film under a non-oxidizing gas atmosphere at a substrate temperature lower than 300° C. to promote mineralization or crystallization of the film, thereby forming a conductive oxide fine-particle layer densely packed with conductive oxide fine particles having a metal oxide as a main component.
    Type: Application
    Filed: November 5, 2010
    Publication date: September 6, 2012
    Applicant: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yuki Murayama, Takahito Nagano, Yoshihiro Otsuka
  • Patent number: 8167675
    Abstract: A dispersion-type EL element is a dispersion-type electroluminescent element with at least a transparent coating layer, a transparent conductive layer, a phosphor layer, a dielectric layer and a rear electrode layer sequentially formed on a base film surface. The transparent coating layer can be peeled off the surface of the base film. The transparent conductive layer is formed by applying a coating liquid composed mainly of conductive oxide particles and a binder on a surface of the transparent coating layer, applying compression processing to the applied layer and then curing the compressed layer.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: May 1, 2012
    Assignee: Sumitomo Metal Mining Co., Ltd
    Inventors: Masaya Yukinobu, Yuki Murayama, Yasuo Tsukui
  • Patent number: 8110986
    Abstract: A dispersion-type EL element formed on a thin or flexible transparent plastic film and a method for manufacturing the same are provided. The dispersion-type electroluminescent element is a dispersion-type electroluminescent element with at least a transparent conductive layer, a phosphor layer, a dielectric layer, and a rear electrode layer sequentially formed on a transparent plastic film surface, in which a thickness of the transparent plastic film is less than 50 ?m, and the transparent conductive layer is formed by applying compression processing to an applied layer formed by applying a transparent conductive layer forming application liquid mainly composed of conductive oxide particles and a binder on the transparent plastic film surface and then, curing the compressed layer.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: February 7, 2012
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masaya Yukinobu, Yuki Murayama, Hiroyuki Tanaka, Yasuo Tsukui