Patents by Inventor Thi Cong To
Thi Cong To 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: 9273229Abstract: A method for producing de-colored shellac by dissolving colored shellac in an aqueous solution comprising an alkaline agent; contacting the colored shellac in the aqueous solution with a sufficient amount of a chlorite salt to achieve de-coloration of the shellac; precipitating the de-colored shellac by neutralizing the aqueous solution with an acid; and recovering the precipitated de-colored shellac from said aqueous solution. The de-colored shellac produced is non-toxic and suitable for human use. Dental compositions comprising the de-colored shellac are disclosed, as well as uses of the de-colored shellac as a food product coating, a nail polish or varnish, and a wood varnish.Type: GrantFiled: July 15, 2013Date of Patent: March 1, 2016Assignee: d-ANTAEUSInventors: Thi Cong To, Thuc Soan Nguyen
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Publication number: 20140065079Abstract: A method for producing de-colored shellac by dissolving colored shellac in an aqueous solution comprising an alkaline agent; contacting the colored shellac in the aqueous solution with a sufficient amount of a chlorite salt to achieve de-coloration of the shellac; precipitating the de-colored shellac by neutralizing the aqueous solution with an acid; and recovering the precipitated de-colored shellac from said aqueous solution. The de-colored shellac produced is non-toxic and suitable for human use. Dental compositions comprising the de-colored shellac are disclosed, as well as uses of the de-colored shellac as a food product coating, a nail polish or varnish, and a wood varnish.Type: ApplicationFiled: July 15, 2013Publication date: March 6, 2014Inventors: Thi Cong To, Thuc Soan Nguyen
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Publication number: 20110188991Abstract: A hydraulic turbine including: a passageway permitting liquid to pass through the turbine; a draft tube defining a portion of the passageway through which liquid normally flows in a vortex flow path during optimal turbine operating conditions; a rotatable runner mounted upstream of the draft tube and rotating about a central axis passing through the runner and extending into the draft tube; at least one nozzle head device positioned relative to the central axis of the runner and adjacent to an upper portion of the draft tube, the at least one nozzle head device has at least one nozzle from which a corresponding control jet of high velocity liquid is injected axially downstream of the runner and into liquid flowing into the upper portion of the draft tube during part load turbine operation, so as to mitigate breakdown of the vortex flow path.Type: ApplicationFiled: February 23, 2007Publication date: August 4, 2011Applicant: ANDRITZ TECHNOLOGY AND ASSET MANAGEMENT GMBHInventors: Gabriel Ciocan, Thi Cong Vu, Bernd Nennemann, Eric Demers, Romeo Florin Susan-Resiga
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Patent number: 7901505Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: GrantFiled: February 2, 2009Date of Patent: March 8, 2011Assignee: Boral Material Technologies Inc.Inventors: Russell L. Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Patent number: 7892349Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: GrantFiled: February 2, 2009Date of Patent: February 22, 2011Assignee: Boral Material Technologies Inc.Inventors: Russell L. Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Patent number: 7892350Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: GrantFiled: February 2, 2009Date of Patent: February 22, 2011Assignee: Boral Material Technologies Inc.Inventors: Russell L. Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Patent number: 7691350Abstract: A method of treating fly ash and fly ash treated thereby, the method involving contacting ammonia-laden fly ash with an organic base-containing treatment composition, where the organic base causes the ammonia within the fly ash to evolve from the fly ash. The treatment composition preferably includes an effective amount of one or more amines. The treatment compound may be applied to the fly ash in any manner effective to disperse the treatment compound among the fly ash.Type: GrantFiled: January 22, 2008Date of Patent: April 6, 2010Assignee: Boral Material Technologies Inc.Inventors: Russell L. Hill, Carmel Jolicoeur, Thi Cong To
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Publication number: 20090199742Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: ApplicationFiled: February 2, 2009Publication date: August 13, 2009Applicant: HANDY CHEMICALS LTD.Inventors: Russell Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Publication number: 20090199744Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: ApplicationFiled: February 2, 2009Publication date: August 13, 2009Applicant: HANDY CHEMICALS LTD.Inventors: Russell L. Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Publication number: 20090199743Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: ApplicationFiled: February 2, 2009Publication date: August 13, 2009Applicant: Handy Chemicals Ltd.Inventors: Russell Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Patent number: 7485184Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: GrantFiled: January 22, 2004Date of Patent: February 3, 2009Assignee: Handy Chemicals Ltd.Inventors: Russell Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To
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Patent number: 7407546Abstract: A method of treating fly ash and fly ash treated thereby, the method involving contacting ammonia-laden fly ash with an organic base-containing treatment composition, where the organic base causes the ammonia within the fly ash to evolve from the fly ash. The treatment composition preferably includes an effective amount of one or more amines. The treatment compound may be applied to the fly ash in any manner effective to disperse the treatment compound among the fly ash.Type: GrantFiled: January 7, 2008Date of Patent: August 5, 2008Assignee: Boral Material Technologies Inc.Inventors: Russell L. Hill, Carmel Jolicoeur, Thi Cong To
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Publication number: 20080131344Abstract: A method of treating fly ash and fly ash treated thereby, the method involving contacting ammonia-laden fly ash with an organic base-containing treatment composition, where the organic base causes the ammonia within the fly ash to evolve from the fly ash. The treatment composition preferably includes an effective amount of one or more amines. The treatment compound may be applied to the fly ash in any manner effective to disperse the treatment compound among the fly ash.Type: ApplicationFiled: January 22, 2008Publication date: June 5, 2008Applicant: BORAL MATERIAL TECHNOLOGIES INC.Inventors: Russell L. Hill, Carmel Jolicoeur, Thi Cong To
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Patent number: 7329397Abstract: A method of treating fly ash and fly ash treated thereby, the method involving contacting ammonia-laden fly ash with an organic base-containing treatment composition, where the organic base causes the ammonia within the fly ash to evolve from the fly ash. The treatment composition preferably includes an effective amount of one or more amines. The treatment compound may be applied to the fly ash in any manner effective to disperse the treatment compound among the fly ash.Type: GrantFiled: September 2, 2005Date of Patent: February 12, 2008Assignee: Boral Material Technologies Inc.Inventors: Russell Hill, Carmel Jolicoeur, Thi Cong To
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Publication number: 20040206276Abstract: A method of producing cementitious mixtures containing fly ash as one of the cementitious components, under air entrainment conditions. The method involves forming a mixture comprising water, cement, fly ash, optionally other cementitious materials, aggregate, conventional chemical admixtures, and an air entrainment agent and agitating the mixture to entrain air therein. Additionally, at least one sacrificial agent is also included in the mixture. The sacrificial agent is a material or mixture of materials that is not required to act as an air entrainment agent but interacts preferentially with components of the fly ash that otherwise neutralize, repress or depress the activity of the air entrainment agent. The invention includes cementitious mixtures and hardened concretes resulting from the method and fly ash treated with sacrificial agent, or air entrainment agent/sacrificial agent combinations, and processes for selecting suitable sacrificial agents.Type: ApplicationFiled: January 22, 2004Publication date: October 21, 2004Applicant: Handy Chemicals LimitedInventors: Russell Hill, Carmel R. Jolicoeur, Monique Page, Ioan Spiratos, Thi Cong To