Patents by Inventor Hefei Dong
Hefei Dong 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: 11155940Abstract: A partially degradable polymeric fiber includes a thermally degradable polymeric core and a coating surrounding at least a portion of the core. The thermally degradable polymeric core includes a polymeric matrix including a poly(hydroxy-alkanoate), and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the core polymeric matrix. The concentration of the metal in the polymeric matrix is at least 0.1 wt %. The partially degradable polymeric fiber may be used to form a microvascular system containing one or more microfluidic channels.Type: GrantFiled: June 1, 2018Date of Patent: October 26, 2021Assignee: The Board of Trustees of the University of IllinoisInventors: Hefei Dong, Stephen J. Pety, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Patent number: 10865306Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.Type: GrantFiled: April 23, 2018Date of Patent: December 15, 2020Assignee: The Board of Trustees of the University of IllinoisInventors: Aaron P. Esser-Kahn, Hefei Dong, Piyush R. Thakre, Jason F. Patrick, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Publication number: 20180362757Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.Type: ApplicationFiled: April 23, 2018Publication date: December 20, 2018Applicant: The Board of Trustees of the University of IllinoisInventors: Aaron P. ESSER-KAHN, Hefei DONG, Piyush R. THAKRE, Jason F. PATRICK, Nancy R. SOTTOS, Jeffrey S. MOORE, Scott R. WHITE
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Publication number: 20180327941Abstract: A partially degradable polymeric fiber includes a thermally degradable polymeric core and a coating surrounding at least a portion of the core. The thermally degradable polymeric core includes a polymeric matrix including a poly(hydroxy-alkanoate), and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the core polymeric matrix. The concentration of the metal in the polymeric matrix is at least 0.1 wt %. The partially degradable polymeric fiber may be used to form a microvascular system containing one or more microfluidic channels.Type: ApplicationFiled: June 1, 2018Publication date: November 15, 2018Applicant: The Board of Trustees of the University of IllinoisInventors: Hefei DONG, Stephen J. Pety, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Patent number: 9988746Abstract: A partially degradable polymeric fiber includes a thermally degradable polymeric core and a coating surrounding at least a portion of the core. The thermally degradable polymeric core includes a polymeric matrix including a poly(hydroxyalkanoate), and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the core polymeric matrix. The concentration of the metal in the polymeric matrix is at least 0.1 wt %. The partially degradable polymeric fiber may be used to form a microvascular system containing one or more microfluidic channels.Type: GrantFiled: September 27, 2013Date of Patent: June 5, 2018Assignee: The Board of Trustees of the University of IllinoisInventors: Hefei Dong, Stephen J. Pety, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Patent number: 9951221Abstract: A thermally degradable polymeric fiber comprising a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal in the form of a compound selected from the group consisting of an alkaline earth metal oxide, a tin salt of a mono- or di-carboxylic acid, and scandium triflate (Sc(0Tf)3), where the concentration of the metal in the fiber matrix is at least 0.1 wt %.Type: GrantFiled: January 27, 2015Date of Patent: April 24, 2018Assignee: The Board of Trustees of the University of IllinoisInventors: Aaron P. Esser-Kahn, Hefei Dong, Piyush R. Thakre, Jason F. Patrick, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Publication number: 20150240072Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.Type: ApplicationFiled: January 27, 2015Publication date: August 27, 2015Applicant: The Board of Trustees of the University of IllinoisInventors: Aaron P. Esser-Kahn, Hefei Dong, Piyush R. Thakre, Jason F. Patrick, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Publication number: 20140162519Abstract: A partially degradable polymeric fiber includes a thermally degradable polymeric core and a coating surrounding at least a portion of the core. The thermally degradable polymeric core includes a polymeric matrix including a poly(hydroxy-alkanoate), and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the core polymeric matrix. The concentration of the metal in the polymeric matrix is at least 0.1 wt %. The partially degradable polymeric fiber may be used to form a microvascular system containing one or more microfluidic channels.Type: ApplicationFiled: September 27, 2013Publication date: June 12, 2014Applicant: The Board of Trustees of the University of IllinoisInventors: Hefei Dong, Stephen J. Pety, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White
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Publication number: 20130065042Abstract: A microvascular system includes a solid polymeric matrix and a woven structure in the matrix. The woven structure includes a plurality of fibers, and a plurality of microfluidic channels, where at least a portion of the microfluidic channels are interconnected. The microvascular system may be made by forming a composite that includes a solid polymeric matrix and a plurality of sacrificial fibers in the matrix, heating the composite to a temperature of from 100 to 250° C., maintaining the composite at a temperature of from 100 to 250° C. for a time sufficient to form degradants from the sacrificial fibers, and removing the degradants from the composite. The sacrificial fibers may include a polymeric fiber matrix including a poly(hydroxyalkanoate) and a metal selected from the group consisting of an alkali earth metal and a transition metal, in the fiber matrix, where the concentration of the metal in the fiber matrix is at least 0.1 wt %.Type: ApplicationFiled: March 9, 2012Publication date: March 14, 2013Applicant: The Board of Trustees of the University of IllinoisInventors: Aaron Esser-Kahn, Hefei Dong, Piyush R. Thakre, Jason F. Patrick, Nancy R. Sottos, Jeffrey S. Moore, Scott R. White