Patents by Inventor Constance Ann Schall
Constance Ann Schall 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: 8546109Abstract: The present invention relates to a method for lignocellulosic conversion to sugar using an ionic liquid pretreatment for the saccharification of lignocellulosic biomass. Thus, cellulose, hemicellulose, when hydrolyzed into their sugars, can be converted to ethanol fuel through well-established fermentation technologies. These sugars also form the feedstocks for production of a variety of chemical and polymers. The complex structure of the biomass required pretreatment to enable efficient saccharification of cellulose and hemicellulose components to their constituent sugars.Type: GrantFiled: September 1, 2011Date of Patent: October 1, 2013Assignees: Suganit Systems, Inc., The University of ToledoInventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi, Jared Anderson, Kripa Rao, Praveen Paripati, Guneet Kumar
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Patent number: 8236536Abstract: Dissolution, partial dissolution or softening of cellulose in an ionic liquid (IL) and its subsequent contact with anti-solvent produces regenerated cellulose more amorphous in structure than native cellulose, which can be separated from the IL/anti-solvent mixture by mechanical means such as simple filtration or centrifugation. This altered morphology of IL-treated cellulose allows a greater number of sites for enzyme adsorption with a subsequent enhancement of its saccharification. The IL-treated cellulose exhibits significantly improved hydrolysis kinetics with optically transparent solutions formed after about two hours of reaction. This provides an opportunity for separation of products from the catalyst (enzyme) easing enzyme recovery. With an appropriate selection of enzymes, initial hydrolysis rates for IL-treated cellulose were up to two orders of magnitude greater than those of untreated cellulose.Type: GrantFiled: January 13, 2010Date of Patent: August 7, 2012Assignee: The University of ToledoInventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi
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Publication number: 20120193046Abstract: A method for lignocellulose conversion to sugar with improvements in yield and rate of sugar production has been developed by using ionic liquid pretreatment. This new pretreatment strategy substantially improves the efficiency (in terms of yield and reaction rates) of saccharification of lignocellulosic biomass. Cellulose and hemicellulose, when hydrolyzed into their sugars, can be converted into ethanol fuel through well established fermentation technologies. These sugars also form the feedstocks for production of variety of chemicals and polymers. The complex structure of biomass requires proper pretreatment to enable efficient saccharification of cellulose and hemicellulose components to their constituent sugars. Current pretreatment approaches suffer from slow reaction rates of cellulose hydrolysis (by using the enzyme cellulase) and low yields.Type: ApplicationFiled: September 1, 2011Publication date: August 2, 2012Applicants: Suganit Systems, Inc., The University of ToledoInventors: Sasidhar VARANASI, Constance Ann Schall, Anantharam Prasad Dadi, Jared Anderson, Kripa Rao, Praveen Paripati, Guneet Kumar
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Patent number: 8030030Abstract: A method for lignocellulose conversion to sugar with improvements in yield and rate of sugar production has been developed by using ionic liquid pretreatment. This new pretreatment strategy substantially improves the efficiency (in terms of yield and reaction rates) of saccharification of lignocellulosic biomass. Cellulose and hemicellulose, when hydrolyzed into their sugars, can be converted into ethanol fuel through well established fermentation technologies. These sugars also form the feedstocks for production of variety of chemicals and polymers. The complex structure of biomass requires proper pretreatment to enable efficient saccharification of cellulose and hemicellulose components to their constituent sugars. Current pretreatment approaches suffer from slow reaction rates of cellulose hydrolysis (by using the enzyme cellulase) and low yields.Type: GrantFiled: March 13, 2008Date of Patent: October 4, 2011Assignees: The University of Toledo, Suganit Systems, Inc.Inventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi, Jared Anderson, Kripa Rao, Guneet Kumar, Praveen Paripati
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Publication number: 20100233773Abstract: Dissolution, partial dissolution or softening of cellulose in an ionic liquid (IL) and its subsequent contact with anti-solvent produces regenerated cellulose more amorphous in structure than native cellulose, which can be separated from the IL/anti-solvent mixture by mechanical means such as simple filtration or centrifugation. This altered morphology of IL-treated cellulose allows a greater number of sites for enzyme adsorption with a subsequent enhancement of its saccharification. The IL-treated cellulose exhibits significantly improved hydrolysis kinetics with optically transparent solutions formed after about two hours of reaction. This provides an opportunity for separation of products from the catalyst (enzyme) easing enzyme recovery. With an appropriate selection of enzymes, initial hydrolysis rates for IL-treated cellulose were up to two orders of magnitude greater than those of untreated cellulose.Type: ApplicationFiled: January 13, 2010Publication date: September 16, 2010Applicant: Toledo, The University OfInventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi
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Patent number: 7674608Abstract: Dissolution, partial dissolution or softening of cellulose in an ionic liquid (IL) and its subsequent contact with anti-solvent produces regenerated cellulose more amorphous in structure than native cellulose, which can be separated from the IL/anti-solvent mixture by mechanical means such as simple filtration or centrifugation. This altered morphology of IL-treated cellulose allows a greater number of sites for enzyme adsorption with a subsequent enhancement of its saccharification. The IL-treated cellulose exhibits significantly improved hydrolysis kinetics with optically transparent solutions formed after about two hours of reaction. This provides an opportunity for separation of products from the catalyst (enzyme) easing enzyme recovery. With an appropriate selection of enzymes, initial hydrolysis rates for IL-treated cellulose were up to two orders of magnitude greater than those of untreated cellulose.Type: GrantFiled: February 23, 2007Date of Patent: March 9, 2010Assignee: The University of ToledoInventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi
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Publication number: 20090011473Abstract: Dissolution, partial dissolution or softening of cellulose in an ionic liquid (IL) and its subsequent contact with anti-solvent produces regenerated cellulose more amorphous in structure than native cellulose, which can be separated from the IL/anti-solvent mixture by mechanical means such as simple filtration or centrifugation. This altered morphology of IL-treated cellulose allows a greater number of sites for enzyme adsorption with a subsequent enhancement of its saccharification. The IL-treated cellulose exhibits significantly improved hydrolysis kinetics with optically transparent solutions formed after about two hours of reaction. This provides an opportunity for separation of products from the catalyst (enzyme) easing enzyme recovery. With an appropriate selection of enzymes, initial hydrolysis rates for IL-treated cellulose were up to two orders of magnitude greater than those of untreated cellulose.Type: ApplicationFiled: February 23, 2007Publication date: January 8, 2009Inventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi
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Publication number: 20080227162Abstract: A method for lignocellulose conversion to sugar with improvements in yield and rate of sugar production has been developed by using ionic liquid pretreatment. This new pretreatment strategy substantially improves the efficiency (in terms of yield and reaction rates) of saccharification of lignocellulosic biomass. Cellulose and hemicellulose, when hydrolyzed into their sugars, can be converted into ethanol fuel through well established fermentation technologies. These sugars also form the feedstocks for production of variety of chemicals and polymers. The complex structure of biomass requires proper pretreatment to enable efficient saccharification of cellulose and hemicellulose components to their constituent sugars. Current pretreatment approaches suffer from slow reaction rates of cellulose hydrolysis (by using the enzyme cellulase) and low yields.Type: ApplicationFiled: March 13, 2008Publication date: September 18, 2008Inventors: Sasidhar Varanasi, Constance Ann Schall, Anantharam Prasad Dadi, Jared Anderson, Kripa Rao