Patents by Inventor Ryuichi Yoshimoto
Ryuichi Yoshimoto 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: 9492248Abstract: A dental implant includes a male threading part and an implantation torque increasing part from the tip side. The male threading part includes multiple threading parts that have the same lead but different pitches, with the pitch increasing toward the tip side. The outer diameter of the male threading part is constant or increases toward the implantation torque increasing part. The implantation torque increasing part includes thread crests that have a different lead from the lead of the male threading part or a projecting row that is continuous circumferentially. In cross-section, a contour line connecting tops of the thread crests of the threading part that is adjacent to the implantation torque increasing part is a straight line, and the tops of the thread crests or the top of the projecting row of the implantation torque increasing part are located on an extension line of the contour line.Type: GrantFiled: July 9, 2012Date of Patent: November 15, 2016Assignee: SHOFU INC.Inventors: Koji Hori, Masayoshi Nishizawa, Ariyoshi Matsuno, Ryuichi Yoshimoto
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Patent number: 9427379Abstract: Provided are opaque materials exhibiting a good adhesive strength and a good color tone reproduction comparable with natural dental crowns as well as having a good operability. In addition, the opaque materials may exhibit a stain-resistance property in rebuilding-up a dental composition on the opaque materials in a cured form with a metal instrument. Further, the opaque materials may exhibit a good color tone reproduction comparable with natural dental crowns even if a dental membrane is thinly formed from the opaque metals. The dental membrane is formed from a first opaque layer and a second opaque layer, wherein the first opaque layer contains a filler of indefinite-shape particles and the second opaque layer contains a filler of spherical-shape particles, and wherein the first opaque layer is formed on a metal base and the second opaque layer is formed on the first opaque layer.Type: GrantFiled: March 24, 2014Date of Patent: August 30, 2016Assignee: KABUSHIKI KAISHA SHOFUInventors: Jun Uchida, Mitsuji Teramae, Shuhei Takahashi, Masanori Goto, Ryuichi Yoshimoto
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Publication number: 20150190215Abstract: A method of manufacturing a sintered ceramic implant fixture that includes a first portion configured to be buried in tissue of a living organism and a second portion configured to serve as a mount for a superstructure. The method includes fabricating a master model, subjecting the master model to blasting to roughen a surface of the master model, fabricating a mold having a cavity that is defined by the master model having the roughened surface, pouring a slurry containing ceramic powder into the cavity of the mold to obtain a hardened but not-yet-sintered ceramic implant fixture, and sintering the hardened but not-yet-sintered ceramic implant fixture to obtain the sintered ceramic implant fixture.Type: ApplicationFiled: March 16, 2015Publication date: July 9, 2015Inventors: Tateki Kashiwabara, Tetsuro Goto, Mikito Deguchi, Ryuichi Yoshimoto, Koji Hori, Michio Ito
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Publication number: 20140295376Abstract: Provided are opaque materials exhibiting a good adhesive strength and a good color tone reproduction comparable with natural dental crowns as well as having a good operability. In addition, the opaque materials may exhibit a stain-resistance property in rebuilding-up a dental composition on the opaque materials in a cured form with a metal instrument. Further, the opaque materials may exhibit a good color tone reproduction comparable with natural dental crowns even if a dental membrane is thinly formed from the opaque metals. The dental membrane is formed from a first opaque layer and a second opaque layer, wherein the first opaque layer contains a filler of indefinite-shape particles and the second opaque layer contains a filler of spherical-shape particles, and wherein the first opaque layer is formed on a metal base and the second opaque layer is formed on the first opaque layer.Type: ApplicationFiled: March 24, 2014Publication date: October 2, 2014Applicant: KABUSHIKI KAISHA SHOFUInventors: Jun UCHIDA, Mitsuji TERAMAE, Shuhei TAKAHASHI, Masanori GOTO, Ryuichi YOSHIMOTO
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Patent number: 8784112Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.Type: GrantFiled: October 4, 2013Date of Patent: July 22, 2014Assignee: Kabushiki Kaisha ShofuInventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
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Publication number: 20140030685Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.Type: ApplicationFiled: October 4, 2013Publication date: January 30, 2014Applicant: KABUSHIKI KAISHA SHOFUInventors: Yusei KADOBAYASHI, Hirokazu SATO, Ryuichi YOSHIMOTO
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Publication number: 20130177874Abstract: A dental implant includes a male threading part and an implantation torque increasing part from the tip side. The male threading part includes multiple threading parts that have the same lead but different pitches, with the pitch increasing toward the tip side. The outer diameter of the male threading part is constant or increases toward the implantation torque increasing part. The implantation torque increasing part includes thread crests that have a different lead from the lead of the male threading part or a projecting row that is continuous circumferentially. In cross-section, a contour line connecting tops of the thread crests of the threading part that is adjacent to the implantation torque increasing part is a straight line, and the tops of the thread crests or the top of the projecting row of the implantation torque increasing part are located on an extension line of the contour line.Type: ApplicationFiled: July 9, 2012Publication date: July 11, 2013Applicant: SHOFU INC.Inventors: Koji HORI, Masayoshi NISHIZAWA, Ariyoshi MATSUNO, Ryuichi YOSHIMOTO
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Publication number: 20130017511Abstract: An implant fixture is made from ceramics containing zirconia. The implant fixture has monoclinic percentage of 1 volume % or less. The implant fixture includes a buried portion having an arithmetic average roughness Ra in the range of 1 to 5 ?m. The zirconia content accounts for 86 mass % or more in the implant fixture. The implant fixture contains alumina and/or yttria. Further, the implant fixture has a sintered grain size of 0.45 ?m or less.Type: ApplicationFiled: May 14, 2012Publication date: January 17, 2013Applicants: SHOFU, INC., KIKUSUI CHEMICAL INDUSTRIES CO., LTD.Inventors: Tateki Kashiwabara, Tetsuro Goto, Mikito Deguchi, Ryuichi Yoshimoto, Koji Hori, Michio Ito
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Patent number: 8304356Abstract: The present invention relates to a color adapting composition used for coloring and color adapting porcelain for ceramic crown such as dental restorations and prosthetics, and aluminosilicate glass appropriate for using in a color adapting composition. More specifically, a color adapting composition for dental porcelains are prepared by blending two or more kinds of glass frits having different sintering temperatures from each other and an inorganic pigment or a colored glass obtained by previously dispersing inorganic pigments in glass.Type: GrantFiled: February 17, 2012Date of Patent: November 6, 2012Assignee: Kabushiki Kaisha ShofuInventors: Yukio Fukatani, Keiji Takahashi, Ryuichi Yoshimoto
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Patent number: 8267695Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.Type: GrantFiled: March 30, 2007Date of Patent: September 18, 2012Assignee: Kabushiki Kaisha ShofuInventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
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Publication number: 20120148750Abstract: The present invention relates to a color adapting composition used for coloring and color adapting porcelain for ceramic crown such as dental restorations and prosthetics, and aluminosilicate glass appropriate for using in a color adapting composition. More specifically, a color adapting composition for dental porcelains are prepared by blending two or more kinds of glass frits having different sintering temperatures from each other and an inorganic pigment or a colored glass obtained by previously dispersing inorganic pigments in glass.Type: ApplicationFiled: February 17, 2012Publication date: June 14, 2012Inventors: Yukio FUKATANI, Keiji TAKAHASHI, Ryuichi YOSHIMOTO
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Publication number: 20090317780Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.Type: ApplicationFiled: March 30, 2007Publication date: December 24, 2009Applicant: Kabushiki Kaisha ShofuInventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
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Publication number: 20090305211Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.Type: ApplicationFiled: March 30, 2007Publication date: December 10, 2009Inventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
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Publication number: 20090227438Abstract: The present invention relates to a color adapting composition used for coloring and color adapting porcelain for ceramic crown such as dental restorations and prosthetics, and aluminosilicate glass appropriate for using in a color adapting composition. More specifically, a color adapting composition for dental porcelains are prepared by blending two or more kinds of glass frits having different sintering temperatures from each other and an inorganic pigment or a colored glass obtained by previously dispersing inorganic pigments in glass.Type: ApplicationFiled: March 4, 2009Publication date: September 10, 2009Inventors: Yukio Fukatani, Keiji Takahashi, Ryuichi Yoshimoto
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Patent number: D632393Type: GrantFiled: October 3, 2008Date of Patent: February 8, 2011Assignee: Shofu Inc.Inventors: Hirokazu Sato, Kunihiro Fujii, Noriyuki Negoro, Ryuichi Yoshimoto
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Patent number: D632394Type: GrantFiled: October 3, 2008Date of Patent: February 8, 2011Assignee: Shofu, Inc.Inventors: Hirokazu Sato, Kunihiro Fujii, Noriyuki Negoro, Ryuichi Yoshimoto
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Patent number: D637722Type: GrantFiled: October 3, 2008Date of Patent: May 10, 2011Assignee: Shofu, Inc.Inventors: Hirokazu Sato, Kunihiro Fujii, Noriyuki Negoro, Ryuichi Yoshimoto
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Patent number: D637723Type: GrantFiled: October 3, 2008Date of Patent: May 10, 2011Assignee: Shofu, Inc.Inventors: Hirokazu Sato, Kunihiro Fujii, Noriyuki Negoro, Ryuichi Yoshimoto
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Patent number: D641479Type: GrantFiled: May 27, 2009Date of Patent: July 12, 2011Assignee: SHOFU Inc.Inventors: Sayaka Ishida, Kunihiro Fujii, Hisashi Okada, Ryuichi Yoshimoto, Noriyuki Negoro, Hirokazu Sato