Patents by Inventor Yoshitsugu Shibuya
Yoshitsugu Shibuya 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: 9212408Abstract: A decorative part comprising a hardening layer having a pink Au alloy coating film on a surface of the part. The hardening layer is obtainable by laminating a base layer, a primary layer and a finishing layer from the side of a substrate. The base layer comprises a metal layer comprising one metal or two or more metals selected from Hf, Ti and Zr and, superimposed thereon, a compound layer comprising the same metal constituting the metal layer and further comprising nitrogen, carbon or oxygen. The primary layer has a laminating structure such that an Au alloy layer, and a compound layer comprising one metal or two or more metals selected from Hf, Ti and Zr and further comprising nitrogen, carbon or oxygen are laminated one after the other. The finishing layer comprises an Au alloy layer.Type: GrantFiled: September 18, 2008Date of Patent: December 15, 2015Assignee: CITIZEN HOLDINGS CO., LTD.Inventors: Junji Satoh, Yoshitsugu Shibuya, Maki Hayakawa, Ryota Koike
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Patent number: 8178222Abstract: A decorative part and a process for producing the decorative part. A first nitride layer containing at least one metal selected among hafnium, titanium, and zirconium is formed on the surface of a decorative part comprising a soft base made of a material selected among stainless steel, titanium and titanium alloys, brass, etc., and a second nitride layer containing at least one metal which is selected among hafnium, titanium, and zirconium and is different from that in the first nitride layer is formed on the first nitride layer to thereby form a primer layer. A multilayered hardened layer including a gold alloy layer is further formed as a finish layer on the primer layer.Type: GrantFiled: September 25, 2007Date of Patent: May 15, 2012Assignee: Citizen Holdings Co., Ltd.Inventors: Yukio Miya, Koichi Naoi, Osamu Tanaka, Yoshitsugu Shibuya, Junji Sato
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Publication number: 20100227156Abstract: [Subject] In a decorative part having a pink Au alloy hard coating film, the sophisticated pink aesthetic appearance thereof can be maintained for long time use by making the decorative part that flaws or peelings are hardly visible even if flaws are caused in the coating film or the coating film is peeled off.Type: ApplicationFiled: September 18, 2008Publication date: September 9, 2010Inventors: Junji Satoh, Yoshitsugu Shibuya, Maki Hayakawa, Ryota Koike
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Publication number: 20100086756Abstract: A decorative part and a process for producing the decorative part. A first nitride layer containing at least one metal selected among hafnium, titanium, and zirconium is formed on the surface of a decorative part comprising a soft base made of a material selected among stainless steel, titanium and titanium alloys, brass, etc., and a second nitride layer containing at least one metal which is selected among hafnium, titanium, and zirconium and is different from that in the first nitride layer is formed on the first nitride layer to thereby form a primer layer. A multilayered hardened layer including a gold alloy layer is further formed as a finish layer on the primer layer.Type: ApplicationFiled: September 25, 2007Publication date: April 8, 2010Applicant: CITIZEN HOLDINGS CO., LTD.Inventors: Yukio Miya, Koichi Naoi, Osamu Tanaka, Yoshitsugu Shibuya, Junji Sato
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Patent number: 7396595Abstract: A soft metal and a decorative article of wristwatch are produced by forming, on the surface of a soft metal article (2), a hard layer (3, 13) containing zirconium and molybdenum, or containing zirconium, molybdenum and further an additive element constituted of at least one or more elements selected from niobium, tantalum, and titanium. It is preferable that the content of molybdenum constituting the hard layer (3, 13) is about 30 to 75 wt %, or that the content of molybdenum is about 25 to 65 wt % and the total content of the additive elements is about 25 wt % or less.Type: GrantFiled: August 30, 2002Date of Patent: July 8, 2008Assignee: Citizen Holdings Co., Ltd.Inventors: Yoshitsugu Shibuya, Junji Satoh, Shizue Ito
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Publication number: 20040231159Abstract: A soft metal and a decorative article of wristwatch are produced by forming, on the surface of a soft metal article (2), a hard layer (3, 13) containing zirconium and molybdenum, or containing zirconium, molybdenum and further an additive element constituted of at least one or more elements selected from niobium, tantalum, and titanium. It is preferable that the content of molybdenum constituting the hard layer (3, 13) is about 30 to 75 wt %, or that the content of molybdenum is about 25 to 65 wt % and the total content of the additive elements is about 25 wt % or less.Type: ApplicationFiled: March 17, 2004Publication date: November 25, 2004Inventors: Yoshitsugu Shibuya, Junji Satoh, Shizue Ito
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Patent number: 6730415Abstract: A film is formed on the surface of a soft metal portion (2) such that the film contains phosphorus and either platinum or palladium, and further, at least one element having homogeneous solubility with platinum or palladium, with the content of the phosphorus being in a range of about 15 to 25 atomic %, or contains boron and iron with the content of the boron being in a range of from about 15 to 25 atomic %. Thus, a soft metal is made up by turning the film into a hard layer (3) made of an amorphous alloy.Type: GrantFiled: April 19, 2002Date of Patent: May 4, 2004Assignee: Citizen Watch Co., Ltd.Inventors: Yoshitsugu Shibuya, Eigou Hashimoto, Junji Satoh, Masahiro Satoh, Seiichi Hiroe
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Publication number: 20030008168Abstract: A film is formed on the surface of a soft metal portion (2) such that the film contains phosphorus and either platinum or palladium, and further, at least one element having homogeneous solubility with platinum or palladium, with the content of the phosphorus being in a range of about 15 to 25 atomic %, or contains boron and iron with the content of the boron being in a range of from about 15 to 25 atomic %. Thus, a soft metal is made up by turning the film into a hard layer (3) made of an amorphous alloy.Type: ApplicationFiled: April 19, 2002Publication date: January 9, 2003Inventors: Yoshitsugu Shibuya, Eigou Hashimoto, Junji Satoh, Masahiro Satoh, Seiichi Hiroe
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Publication number: 20020170633Abstract: A brazing filler metal is composed of palladium, metal having homogeneous solubility with the palladium, and phosphorus as main constituents thereof, with addition of platinum and nickel as the metal having homogeneous solubility with the Pd, wherein a composition ratio of phosphorus falls within a range of about 3 to about 17 wt. %, a composition ratio of platinum falls within a range of about 5 to about 85 wt. %, and a composition ratio of nickel falls within a range of about 5 to about 32 wt. %.Type: ApplicationFiled: March 7, 2002Publication date: November 21, 2002Inventors: Hitoshi Uchida, Yoshitsugu Shibuya
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Patent number: 6221173Abstract: Disposing the titanium or titanium alloy in a vacuum vessel, and applying annealing treatment thereto by heating (a heating process); feeding a mixed gas consisting primarily of nitrogen with a trace of oxygen component into the vessel, and heating inside the vacuum vessel at temperatures in the range of 700 to 800° C. in a predetermined reduced pressure condition for a predetermined length of time such that nitrogen and oxygen are diffused into the interior of the titanium or titanium alloy from the surface thereof so as to pass into solid solution therein (a hardening treatment process); and cooling the titanium or titanium alloy to room temperature after the hardening treatment process (a cooling process), are carried out. After completion of the processes described above, a hard surface layer 101 is formed in the surface region of the titanium or titanium alloy 100.Type: GrantFiled: September 24, 1998Date of Patent: April 24, 2001Assignee: Citizen Watch Co., Ltd.Inventors: Yoshitsugu Shibuya, Masahiro Sato, Junji Sato, Takanori Nanya, Kenji Hanai
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Patent number: 5714012Abstract: A diffuse transmission layer (15) is provided on the front side of a solar battery (13), and the light entering the front side of the solar battery is diffused. A part of the light is reflected toward the front side, and another part is directed to the solar battery (13). The diffuse transmission layer (15) contains a fluorescent substance (14). The fluorescent substance (14) absorbs a predetermined wavelength band of the light incident to the front side of the solar battery and emits fluorescent light. The light generated by the fluorescent substance (14) is diffused within the diffuse transmission layer (15). A part of the light is emitted to the front side, and another part falls onto the solar battery (13). Owing to this arrangement, a bright external appearance of the device can be obtained, hiding the solar battery (13). A sufficient amount of light energy can be supplied to the solar battery (13).Type: GrantFiled: June 14, 1996Date of Patent: February 3, 1998Assignee: Citizen Watch Co, Ltd.Inventors: Yasushi Murata, Yoshitsugu Shibuya, Takanori Nanya
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Patent number: 5511587Abstract: A diamond-like carbon (DLC) film is formed on a portion of a reed blade in a high-speed loom which requires the highest wear resistance. When a stainless steel is used as the base material of the reed blade, the DLC film is formed through an intermediate layer comprising, e.g., a titanium carbide layer. Reed blades coated with a DLC film are arranged at the side portions of the reed where wear progresses quickly, while reed blades coated with hard films requiring a relatively low cost, or non-coated reed blades, are arranged in the central portion of the reed, thereby uniforming the blade wear throughout the entire reed. The reed is suitable to many types of fibers, ranging from natural to synthetic and new material fibers.Type: GrantFiled: April 19, 1995Date of Patent: April 30, 1996Assignee: Citizen Watch Co., Ltd.Inventors: Yukio Miya, Shigeru Kizaki, Osamu Sugiyama, Akiteru Hatayama, Yoshitsugu Shibuya, Mitsugu Enomoto, Koichi Naoi, Yuji Fukazawa, Takanori Nanya, Shotaro Shimizu, Hiroshi Tagawa