Patents by Inventor Hidetoshi Gyakushi
Hidetoshi Gyakushi 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: 9125818Abstract: To suppress a curing agent paste stored in a sealed state in a packaging container from self-curing over a long period of time, provided are a dental alginate impression material as described below, and a curing agent paste to be used for the dental alginate impression material. The dental alginate impression material may includes: a base material paste including as main components: an alginic acid salt (A); and water (B); and a curing agent paste including as main components: a gelling reaction agent (C); a poorly water-soluble organic solvent (D); and a humectant (E).Type: GrantFiled: October 21, 2011Date of Patent: September 8, 2015Assignee: TOKUYAMA DENTAL CORPORATIONInventors: Yuko Nagasawa, Koji Matsushige, Hidetoshi Gyakushi
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Patent number: 9125810Abstract: Provided is an aqueous composition containing alginic acid or a derivative thereof, the composition having a viscosity retained stably over a long period of time. The alginic acid-containing aqueous composition includes alginic acid or a derivative thereof (A), water (B), and a non-reducing sugar (C). Also provided are a dental alginate impression material and a base material for a dental alginate impression material each using the composition, in which the viscosity of the aqueous composition is stably maintained for a long period.Type: GrantFiled: April 20, 2011Date of Patent: September 8, 2015Assignee: TOKUYAMA DENTAL CORPORATIONInventors: Hidetoshi Gyakushi, Koji Matsushige, Yuko Nagasawa
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Patent number: 8985399Abstract: [Problems] To provide an ejection container capable of falling a liquid in drops from the container body without relying on the sense of the fingertips and without affected by a change in the temperature. [Means for Solution] A knock-type ejection container 1 in which an ejection port 8 is provided at one end of a container body 2, a knock button 4 is provided at the other end thereof, a container chamber 22 is provided in the container body 2 to contain a liquid, and the liquid contained in the container chamber 22 is ejected from the ejection port 8 being interlocked to the operation of the knock button 4.Type: GrantFiled: September 5, 2011Date of Patent: March 24, 2015Assignee: Tokuyama Dental CorporationInventors: Hidetoshi Gyakushi, Nobutoshi Yamaguchi
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Patent number: 8796354Abstract: [Problems] A dental adhesive composition containing an acid group-containing polymerizable monomer, that can be used as a dental adhesive material or a primer. The dental adhesive composition has excellent durability of adhesion exhibiting further improved adhering strength and durability of adhesion enabling teeth to be more strongly adhered to a composite resin or a prosthetic over extended periods of time. [Means for Solution] The dental adhesive composition contains a polymerizable monomer and ions of an element of the Group IV as basic components, at least 10 mass % of the polymerizable monomer being a polymerizable monomer having a hydrogenphosphate diester group, such as bis(2-methacryloyloxyethyl)hydrogenphosphate or 2-methacryloyloxyethylphenyl hydrogenphosphate, and the content of ions of the element of the Group IV such as titanium ions or zirconium ions in the composition being 0.1 to 1.Type: GrantFiled: July 22, 2009Date of Patent: August 5, 2014Assignee: Tokuyama Dental CorporationInventors: Hidetoshi Gyakushi, Takeshi Suzuki, Mihoko Kajikawa, Hideki Kazama
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Publication number: 20130220172Abstract: To suppress a curing agent paste stored in a sealed state in a packaging container from self-curing over a long period of time, provided are a dental alginate impression material as described below, and a curing agent paste to be used for the dental alginate impression material. The dental alginate impression material may includes: a base material paste including as main components: an alginic acid salt (A); and water (B); and a curing agent paste including as main components: a gelling reaction agent (C); a poorly water-soluble organic solvent (D); and a humectant (E).Type: ApplicationFiled: October 21, 2011Publication date: August 29, 2013Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Yuko Nagasawa, Koji Matsushige, Hidetoshi Gyakushi
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Publication number: 20130175300Abstract: [Problems] To provide an ejection container capable of falling a liquid in drops from the container body without relying on the sense of the fingertips and without affected by a change in the temperature. [Means for Solution] A knock-type ejection container 1 in which an ejection port 8 is provided at one end of a container body 2, a knock button 4 is provided at the other end thereof, a container chamber 22 is provided in the container body 2 to contain a liquid, and the liquid contained in the container chamber 22 is ejected from the ejection port 8 being interlocked to the operation of the knock button 4.Type: ApplicationFiled: September 5, 2011Publication date: July 11, 2013Applicant: Tokuyama Dental CorporationInventors: Hidetoshi Gyakushi, Nobutoshi Yamaguchi
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Patent number: 8470986Abstract: A method for producing an oxazoline derivative from a non-protected sugar in a simple manner and a method for producing a glycoside by utilizing the product of the aforementioned method are disclosed. A sugar oxazoline derivative is synthesized in one step in an aqueous solution from a sugar having a free hemiacetal hydroxy group and an amide group by using a haloformamidinium derivative as a dehydration/condensation agent. A glycoside is produced by using the oxazolidine derivative as a sugar donor and also using a sugar dehydrogenase. The method can be applied to the production of a compound having a long sugar chain, and is therefore useful for a production of a physiologically active oligosaccharide, a carrier for a drug delivery system, a surfactant, a carbohydrate pharmaceutical, a glycopeptide, a glycoprotein, a carbohydrate polymer or the like.Type: GrantFiled: March 7, 2008Date of Patent: June 25, 2013Assignee: Tohoku UniversityInventors: Shinichiro Shoda, Atsushi Kobayashi, Masato Noguchi, Tomonari Tanaka, Hidetoshi Gyakushi
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Publication number: 20130032058Abstract: Provided is an aqueous composition containing alginic acid or a derivative thereof, the composition having a viscosity retained stably over a long period of time. The alginic acid-containing aqueous composition includes alginic acid or a derivative thereof (A), water (B), and a non-reducing sugar (C). Also provided are a dental alginate impression material and a base material for a dental alginate impression material each using the composition, in which the viscosity of the aqueous composition is stably maintained for a long period.Type: ApplicationFiled: April 20, 2011Publication date: February 7, 2013Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Hidetoshi Gyakushi, Koji Matsushige, Yuko Nagasawa
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Publication number: 20120160718Abstract: [Problems] To provide a two-liquid mixing container which prevents two liquids from being mixed together by erroneous operation and does not permit sheet-like contaminants from mixing into the mixed liquid. [Means for Solution] A container body 2 of the two-liquid mixing container 1 is provided with liquid injection openings 7a, 8a for feeding different treating solutions into a plurality of liquid chambers 7, 8. A liquid chamber opening/closing member 4 is provided with sealing members which are fitted into one end side of the container body 2 and, at an advanced position of having entered into the liquid injection openings, work to close the liquid injection openings 7a, 8a to separately close the liquid chambers 7, 8 and, at a reversed position, work to open the liquid injection openings 7a, 8a permitting the liquid chambers 7, 8 to be communicated with each other.Type: ApplicationFiled: August 20, 2010Publication date: June 28, 2012Applicant: TOKUYAMA DENTAL CORPORATIONInventors: Nobutoshi Yamaguchi, Hidetoshi Gyakushi
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Publication number: 20110098375Abstract: [Problems] A dental adhesive composition containing an acid group-containing polymerizable monomer, that can be used as a dental adhesive material or a primer. The dental adhesive composition has excellent durability of adhesion exhibiting further improved adhering strength and durability of adhesion enabling teeth to be more strongly adhered to a composite resin or a prosthetic over extended periods of time. [Means for Solution] The dental adhesive composition contains a polymerizable monomer and ions of an element of the Group IV as basic components, at least 10 mass % of the polymerizable monomer being a polymerizable monomer having a hydrogenphosphate diester group, such as bis(2-methacryloyloxyethyl)hydrogenphosphate or 2-methacryloyloxyethylphenyl hydrogenphosphate, and the content of ions of the element of the Group IV such as titanium ions or zirconium ions in the composition being 0.1 to 1.Type: ApplicationFiled: July 22, 2009Publication date: April 28, 2011Applicant: Tokuyama Dental CorporationInventors: Hidetoshi Gyakushi, Takeshi Suzuki, Mihoko Kajikawa, Hideki Kazama
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Publication number: 20100121041Abstract: Disclosed is a process for producing an oxazoline derivative from a non-protected sugar in a simple manner. Also disclosed is a process for producing a glycoside by utilizing the product of the aforementioned process. A sugar oxazoline derivative is synthesized in one step in an aqueous solution from a sugar having a free hemiacetalic hydroxy group and an amido group by using a haloformamidinium derivative as a dehydrating agent. A glycoside compound is produced by using the oxazoline derivative as a sugar donor and also using a sugar dehydrogenase. The method can be applied to the production of a compound having a long sugar chain, and is therefore useful for the production of a physiologically active oligosaccharide, a carrier for a drug delivery system, a surfactant, a carbohydrate-based drug, a glycopeptide, a glycoprotein, a carbohydrate polymer or the like.Type: ApplicationFiled: March 7, 2008Publication date: May 13, 2010Inventors: Shinichiro Shoda, Atsushi Kobayashi, Masato Noguchi, Tomonari Tanaka, Hidetoshi Gyakushi