Patents by Inventor John F. Robyt
John F. Robyt 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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Publication number: 20040096560Abstract: Modified starch materials having a number average molecular weight of at least 10,000 for nutritional products provide a relatively slow release of metabolizable carbohydrates, giving a source of carbohydrate energy over a longer period of time than can be obtained from glucose and other carbohydrates such as lactose, fructose, or sucrose. Such modified starch materials possess altered processing and pasting profile characteristics.Type: ApplicationFiled: November 7, 2003Publication date: May 20, 2004Applicant: Iowa State University Research Foundation, Inc.Inventors: Rickey L. Sharp, John F. Robyt, Murray L. Kaplan
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Patent number: 6676984Abstract: Modified starch materials having a number average molecular weight of at least 10,000 for nutritional products provide a relatively slow release of metabolizable carbohydrates, giving a source of carbohydrate energy over a longer period of time than can be obtained from glucose and other carbohydrates such as lactose, fructose, or sucrose. Such modified starch material possess altered processing and pasting profile characteristics.Type: GrantFiled: October 8, 1998Date of Patent: January 13, 2004Assignee: Iowa State University Research Foundation, Inc.Inventors: Rickey L. Sharp, John F. Robyt, Murray L. Kaplan
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Patent number: 6281351Abstract: Sucrose ester and ether products, useful as food or beverage bulking agents, reduced calorie sweeteners, fat replacement agents, stabilizing agents, thickening agents and emulsifying agents; adhesives; biodegradable plastics and films; sizing agents for paper and textiles; ethical pharmaceuticals and new fibers are prepared by using a two-phase reaction system in which sucrose is dissolved in an alkaline, aqueous solution and an acidic reagent such as a bifunctional acid dichloride or epoxide is added to the sucrose in a water-immiscible organic solvent. Several types of products are produced: water-insoluble sucrose ester (ether) copolymers; water-soluble sucrose ester (ether) copolymers; sucrose ester (ether) dimers; and intramolecular, cyclic sucrose esters (ethers). These products can be further varied by using different kinds of acid dichlorides or epoxides that contain different kinds of functional groups.Type: GrantFiled: May 5, 1998Date of Patent: August 28, 2001Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 6096882Abstract: Reaction at the interface of an organic solution containing an acidic reactant and an aqueous alkaline solution containing nonreducing carbohydrates such as sucrose, sugar alcohols, cyclodextrins, and polysaccharides imparts a specificity to the reaction for one or more of the primary alcohol groups of the carbohydrate reactant. The resulting activated, nonreducing carbohydrate intermediate can then be converted to a series of substantially pure, low molecular weight reaction products, including a sucrose trimer and dianhydrosucrose, and to a series of substantially pure, higher molecular weight reaction products, including 6-O-sucro cyclodextrins and poly-6-O-sucro amylose.Type: GrantFiled: April 13, 1998Date of Patent: August 1, 2000Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 6075139Abstract: Sucrose ester and ether products, useful as food or beverage bulking agents, reduced calorie sweeteners, fat replacement agents, stabilizing agents, thickening agents and emulsifying agents; adhesives; biodegradable plastics and films; sizing agents for paper and textiles; ethical pharmaceuticals and new fibers are prepared by using a two-phase reaction system in which sucrose is dissolved in an alkaline, aqueous solution and an acidic reagent such as a bifunctional acid dichloride or epoxide is added to the sucrose in a water-immiscible organic solvent. Several types of products are produced: water-insoluble sucrose ester (ether) copolymers; water-soluble sucrose ester (ether) copolymers; sucrose ester (ether) dimers; and intramolecular, cyclic sucrose esters (ethers). These products can be further varied by using different kinds of acid dichlorides or epoxides that contain different kinds of functional groups.Type: GrantFiled: July 24, 1996Date of Patent: June 13, 2000Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 6031085Abstract: Reaction at the interface of an organic solution containing an acidic reactant and an aqueous alkaline solution containing nonreducing carbohydrates such as sucrose, sugar alcohols, cyclodextrins, and polysaccharides imparts a specificity to the reaction for one or more of the primary alcohol groups of the carbohydrate reactant. The resulting activated, nonreducing carbohydrate intermediate can then be converted to a series of substantially pure, low molecular weight reaction products, including a sucrose trimer and dianhydrosucrose, and to a series of substantially pure, higher molecular weight reaction products, including 6-O-sucro cyclodextrins and poly-6-O-sucro amylose.Type: GrantFiled: April 13, 1998Date of Patent: February 29, 2000Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 6007862Abstract: Sucrose ester and ether products, useful as food or beverage bulking agents, reduced calorie sweeteners, fat replacement agents, stabilizing agents, thickening agents and emulsifying agents; adhesives; biodegradable plastics and films; sizing agents for paper and textiles; ethical pharmaceuticals and new fibers are prepared by using a two-phase reaction system in which sucrose is dissolved in an alkaline, aqueous solution and an acidic reagent such as a bifunctional acid dichloride or epoxide is added to the sucrose in a water-immiscible organic solvent. Several types of products are produced: water-insoluble sucrose ester (ether) copolymers; water-soluble sucrose ester (ether) copolymers; sucrose ester (ether) dimers; and intramolecular, cyclic sucrose esters (ethers). These products can be further varied by using different kinds of acid dichlorides or epoxides that contain different kinds of functional groups.Type: GrantFiled: May 5, 1998Date of Patent: December 28, 1999Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 5900478Abstract: Reaction at the interface of an organic solution containing an acidic reactant and an aqueous alkaline solution containing nonreducing carbohydrates such as sucrose, sugar alcohols, cyclodextrins, and polysaccharides imparts a specificity to the reaction for one or more of the primary alcohol groups of the carbohydrate reactant. The resulting activated, nonreducing carbohydrate intermediate can then be converted to a series of substantially pure, low molecular weight reaction products, including a sucrose trimer and dianhydrosucrose, and to a series of substantially pure, higher molecular weight reaction products, including 6-O-sucro cyclodextrins and poly-6-O-sucro amylose.Type: GrantFiled: June 20, 1997Date of Patent: May 4, 1999Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 5882420Abstract: Sucrose ester and ether products, useful as food or beverage bulking agents, reduced calorie sweeteners, fat replacement agents, stabilizing agents, thickening agents and emulsifying agents; adhesives; biodegradable plastics and films; sizing agents for paper and textiles; ethical pharmaceuticals and new fibers are prepared by using a two-phase reaction system in which sucrose is dissolved in an alkaline, aqueous solution and an acidic reagent such as a bifunctional acid dichloride or epoxide is added to the sucrose in a water-immiscible organic solvent. Several types of products are produced: water-insoluble sucrose ester (ether) copolymers; water-soluble sucrose ester (ether) copolymers; sucrose ester (ether) dimers; and intramolecular, cyclic sucrose esters (ethers). These products can be further varied by using different kinds of acid dichlorides or epoxides that contain different kinds of functional groups.Type: GrantFiled: May 5, 1998Date of Patent: March 16, 1999Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, Rupendra Mukerjea
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Patent number: 5695803Abstract: Modified starch materials having a number average molecular weight of at least 10,000 for nutritional products provide a relatively slow release of metabolizable carbohydrates, giving a source of carbohydrate energy over a longer period of time than can be obtained from glucose and other carbohydrates such as lactose, fructose, or sucrose.Type: GrantFiled: June 6, 1995Date of Patent: December 9, 1997Assignee: Iowa State University Research Foundation, Inc.Inventors: Rickey L. Sharp, John F. Robyt, Murray L. Kaplan
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Patent number: 4335100Abstract: Dextransucrase synthesis of dextran from sucrose is inhibited by substituted sucrose compounds which have an inhibiting group bonded to the 5-position ring carbon. Oral compositions containing such substituted sucrose compounds can be used to control dextran formation in the mouth, and dextran comprises the principal component of dental plaque.Type: GrantFiled: August 6, 1980Date of Patent: June 15, 1982Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, John N. Zikopoulos
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Patent number: 4228150Abstract: Dextransucrase synthesis of dextran from sucrose is inhibited by novel fluorosucroses which are substituted with fluorine for at least the C.sub.6 hydroxyl, and which may also be substituted with fluorine for other hydroxyls. Oral compositions containing such fluorosucrose can be used to control dextran formation in the mouth. Dextran comprises the principal component of dental plaque.Type: GrantFiled: April 23, 1979Date of Patent: October 14, 1980Assignee: Iowa State University Research Foundation, Inc.Inventors: John F. Robyt, John N. Zikopoulos