Patents by Inventor Masako Shigezawa
Masako Shigezawa 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: 11806202Abstract: A mill blank for dental CAD/CAM for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM has a columnar shape, has at least two recesses which includes a first recess opening to an upper surface of the mill blank and a second recess opening to a bottom surface of the mill blank and at least one notched portion in a circumference portion, the first recess and the second recess respectively include a first surface which is parallel to the upper surface and the bottom surface and a second surface which is a circumferential face concentric with the circumferential face of the mill blank and is vertical to the first surface, and the notched portion is composed of a surface parallel to the center axis of the columnar shape of the mill blank and contacts with the second surface.Type: GrantFiled: August 17, 2017Date of Patent: November 7, 2023Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 11033466Abstract: The present invention provides the dental primer for modifying surface of a dental restoration, comprising: an organic solvent, a silane coupling agent and a weakly acidic compound.Type: GrantFiled: October 10, 2017Date of Patent: June 15, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10905531Abstract: To provide a mill blank for dental CAD/CAM for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM has a substantially columnar shape, the mill blank for dental CAD/CAM has at least one recess in a circumference portion, the recess does not extend over the whole of the circumference portion of the mill blank for dental CAD/CAM, and the recess of the mill blank for dental CAD/CAM is to be engaged with the CAD/CAM device.Type: GrantFiled: July 28, 2017Date of Patent: February 2, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10905532Abstract: To provide a mill blank for dental CAD/CAM containing a ceramic material for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM comprises a ceramic portion in which a dental restoration is cut out and a resin portion which joins with a CAD/CAM device, the mill blank for dental CAD/CAM has a columnar shape, the resin portion is provided at a side surface of the ceramic portion and has a cylindrical shape or a belt shape, a ceramic portion side of the resin portion contacts with the side surface of the ceramic portion, the ceramic portion has a columnar shape, the ceramic portion has a protrusion part, an upper surface and a bottom surface of the columnar shape of the ceramic portion are parallel to each other, the mill blank for dental CAD/CAM has at least two recesses which includes a first recess and a second recess in a circumference portion, the first recess and the second recess respectively include a first surface which is parallel to the uppType: GrantFiled: August 24, 2017Date of Patent: February 2, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10813848Abstract: The present invention provides the dental primer for modifying surface of a dental restoration, comprising: an organic solvent, a silane coupling agent and an acid anhydride.Type: GrantFiled: October 10, 2017Date of Patent: October 27, 2020Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10780027Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes in order of a mixed polymerizable monomer preparing step, a mixed polymerizable monomer preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: GrantFiled: March 19, 2019Date of Patent: September 22, 2020Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10493003Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: GrantFiled: February 21, 2017Date of Patent: December 3, 2019Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10363202Abstract: The present invention relates to a polymerization catalyst having storage stability under an oral cavity environment. Furthermore, the present invention relates to a dental material cured by use of the present polymerization catalyst. The polymerization catalyst for use in the dental material is achieved with including 1-cyclohexyl-5-propylbarbituric acid and trioctylmethylammonium chloride.Type: GrantFiled: December 15, 2015Date of Patent: July 30, 2019Assignee: SHOFU INC.Inventors: Yuji Sadakane, Masako Shigezawa, Yusei Kadobayashi
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Publication number: 20190209439Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes in order of a mixed polymerizable monomer preparing step, a mixed polymerizable monomer preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: ApplicationFiled: March 19, 2019Publication date: July 11, 2019Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Patent number: 10311753Abstract: The compression molded tooth used for practicing dental cutting treatment of the present invention comprises a composition containing a powder or powders of saccharide, polysaccharide, protein, and/or glycoprotein each having a particle size of 1 to 100 ?m.Type: GrantFiled: February 8, 2016Date of Patent: June 4, 2019Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Patent number: 10265248Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes in order of a mixed polymerizable monomer preparing step, a mixed polymerizable monomer preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: GrantFiled: July 13, 2015Date of Patent: April 23, 2019Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa
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Publication number: 20180280253Abstract: The present invention provides the dental primer for modifying surface of a dental restoration, comprising: an organic solvent, a silane coupling agent and a weakly acidic compound.Type: ApplicationFiled: October 10, 2017Publication date: October 4, 2018Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Publication number: 20180280254Abstract: The present invention provides the dental primer for modifying surface of a dental restoration, comprising: an organic solvent, a silane coupling agent and an acid anhydride.Type: ApplicationFiled: October 10, 2017Publication date: October 4, 2018Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Patent number: 9925124Abstract: Provided is a dental composition comprising a first largest group of particles and resin matrix, wherein the first largest group consists of particles whose particle size ranges from 0.7 to 1.5 times the representative particle size of the first largest fraction in a population of particles included in the composition whose particle size ranges from 110 to 1000 ?m; and wherein the ratio of the number of particles included in the first largest group to the number of particles whose particle size ranges from 0.5 to 2.0 times the representative particle size of the first largest fraction is equal to or more than 0.8.Type: GrantFiled: February 29, 2012Date of Patent: March 27, 2018Assignee: KABUSHIKI KAISHA SHOFUInventors: Yusei Kadobayashi, Masako Shigezawa, Keiji Takahashi
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Publication number: 20180055612Abstract: To provide a mill blank for dental CAD/CAM for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM has a columnar shape, the mill blank for dental CAD/CAM has at least two recesses which includes a first recess opening to an upper surface of the mill blank for dental CAD/CAM and a second recess opening to a bottom surface of the mill blank for dental CAD/CAM and at least one notched portion in a circumference portion, the first recess and the second recess respectively include a first surface which is parallel to the upper surface and the bottom surface and a second surface which is a circumferential face concentric with the circumferential face of the mill blank for dental CAD/CAM and is vertical to the first surface, and the notched portion is composed of a surface parallel to the center axis of the columnar shape of the mill blank for dental CAD/CAM and contacts with the second surface.Type: ApplicationFiled: August 17, 2017Publication date: March 1, 2018Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Publication number: 20180055613Abstract: To provide a mill blank for dental CAD/CAM containing a ceramic material for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM comprises a ceramic portion in which a dental restoration is cut out and a resin portion which joins with a CAD/CAM device, the mill blank for dental CAD/CAM has a columnar shape, the resin portion is provided at a side surface of the ceramic portion and has a cylindrical shape or a belt shape, a ceramic portion side of the resin portion contacts with the side surface of the ceramic portion, the ceramic portion has a columnar shape, the ceramic portion has a protrusion part, an upper surface and a bottom surface of the columnar shape of the ceramic portion are parallel to each other, the mill blank for dental CAD/CAM has at least two recesses which includes a first recess and a second recess in a circumference portion, the first recess and the second recess respectively include a first surface which is parallel to the uppType: ApplicationFiled: August 24, 2017Publication date: March 1, 2018Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Publication number: 20180028293Abstract: To provide a dental temporary calcined body including an inside colored by a coloring material wherein, the inside of the dental temporary calcined body is colored by a coloring liquid containing the coloring material and a penetrant containing a permeating liquid.Type: ApplicationFiled: July 28, 2017Publication date: February 1, 2018Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Publication number: 20180028295Abstract: To provide a mill blank for dental CAD/CAM for preparing a dental restoration by being installed in a CAD/CAM device, wherein, the mill blank for dental CAD/CAM has a substantially columnar shape, the mill blank for dental CAD/CAM has at least one recess in a circumference portion, the recess does not extend over the whole of the circumference portion of the mill blank for dental CAD/CAM, and the recess of the mill blank for dental CAD/CAM is to be engaged with the CAD/CAM device.Type: ApplicationFiled: July 28, 2017Publication date: February 1, 2018Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Publication number: 20170189275Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: ApplicationFiled: February 21, 2017Publication date: July 6, 2017Applicant: SHOFU INC.Inventors: Yusei KADOBAYASHI, Masako SHIGEZAWA
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Patent number: RE48730Abstract: A composite material including silanated filler and mixed polymerizable monomer, having a stable pasty property which keeps well and has a consistent usability. A composite material containing a silanated filler, a polymerizable monomer, and a polymerization initiator, and may be produced by a process which includes a mixed polymerizable monomer preparing step, a silanation step, a silanated filler preserving step, a composite material preparing step, a composite material preserving step, a composite material filling step, and a small quantity preserving container preserving step.Type: GrantFiled: March 21, 2019Date of Patent: September 14, 2021Assignee: SHOFU INC.Inventors: Yusei Kadobayashi, Masako Shigezawa