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公开(公告)号：US20250152787A1
公开(公告)日：2025-05-15
申请号：US19017990
申请日：2025-01-13
Applicant: The Texas A&M University System
Inventor： Rachael Muschalek , Keith Hearon , Landon D. Nash , Duncan J. Maitland
Abstract: An embodiment includes a system comprising: a substrate of a medical device; an un-foamed polyurethane coating directly contacting the substrate and fixedly attached to the substrate; a thermoset polyurethane shape memory polymer (SMP) foam, having first and second states, which directly contacts the polyurethane coating and fixedly attaches to the polyurethane coating; wherein the polyurethane coating fixedly attaches the SMP foam to the substrate. Other embodiments are described herein.
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公开(公告)号：US11109869B2
公开(公告)日：2021-09-07
申请号：US16776638
申请日：2020-01-30
Inventor： Anthony Boyle , Keith Hearon , Duncan J. Maitland , Landon D. Nash , Thomas S. Wilson
Abstract: An embodiment of the invention is a shape memory polymer (SMP) foam designed to recover its original shape through exposure to a solvent. Thermo-responsive SMPs are polymers designed to maintain a programmed secondary shape until heated above their transition temperature, upon which the polymer recovers its original, or primary, shape. The thermo-responsive SMP foam is programmed to its secondary shape prior to use, typically compression of the foam to a small volume, and remains in this programmed shape until exposed to a selected solvent such as dimethyl sulfoxide or ethyl alcohol. Upon exposure to the solvent, the transition temperature of the SMP foam decreases below the temperature of the environment and the SMP foam actuates to its primary shape. The SMP foam is tailored to actuate upon exposure to specific solvents while minimizing or preventing actuation when exposed to water or other solvents. This selective solvent actuation can be used to increase working time of a SMP foam device, that is, the time allowed for use of a device without undesired actuation, while maintaining functional SMP actuation. Solvent actuated SMP foams can be used in various applications including, but not limited to, treatment of aneurysms and arterio-venous malformations, tissue engineering, and wound healing.
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公开(公告)号：US20200339730A1
公开(公告)日：2020-10-29
申请号：US16924819
申请日：2020-07-09
Inventor： Keith Hearon , Landon D. Nash , Thomas Wilson , Duncan J. Maitland , Mark A. Wierzbicki
Abstract: An embodiment includes a platform shape memory polymer system. Such an embodiment exhibits a blend of tunable, high performance mechanical attributes in combination with advanced processing capabilities and good biocompatibility. A post-polymerization crosslinking synthetic approach is employed that combines polyurethane and thiol-ene synthetic processes. Other embodiments are described herein.
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公开(公告)号：US20200222595A1
公开(公告)日：2020-07-16
申请号：US16777190
申请日：2020-01-30
Applicant: The Texas A&M University System
Inventor： Rachael Muschalek , Keith Hearon , Landon D. Nash , Duncan J. Maitland
Abstract: An embodiment includes a system comprising: a substrate of a medical device; an un-foamed polyurethane coating directly contacting the substrate and fixedly attached to the substrate; a thermoset polyurethane shape memory polymer (SMP) foam, having first and second states, which directly contacts the polyurethane coating and fixedly attaches to the polyurethane coating; wherein the polyurethane coating fixedly attaches the SMP foam to the substrate. Other embodiments are described herein.
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公开(公告)号：US20250145758A1
公开(公告)日：2025-05-08
申请号：US19015925
申请日：2025-01-10
Inventor： Keith Hearon , Landon D. Nash , Thomas Wilson , Duncan J. Maitland , Mark A. Wierzbicki
Abstract: An embodiment includes a platform shape memory polymer system. Such an embodiment exhibits a blend of tunable, high performance mechanical attributes in combination with advanced processing capabilities and good biocompatibility. A post-polymerization crosslinking synthetic approach is employed that combines polyurethane and thiol-ene synthetic processes. Other embodiments are described herein.
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Patent Agency Ranking
公开(公告)号：US11597792B2
公开(公告)日：2023-03-07
申请号：US16758419
申请日：2018-10-29
Inventor： Grace Fletcher , Landon D. Nash , Kendal Ezell , Duncan J. Maitland
IPC: C08G18/10 , C08G18/32 , C08G18/08 , C08G18/34 , C08G18/73 , C08G18/75 , C08K5/03 , C08G18/50 , C08G101/00
Abstract: An embodiment includes a polymer composition comprising a thermoplastic polymer that: (a) is bonded to iodine, (b) includes a vinyl group, and (c) includes urethane linkages. Other embodiments are described herein.
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公开(公告)号：US10781294B2
公开(公告)日：2020-09-22
申请号：US15746471
申请日：2016-07-22
Inventor： Landon D. Nash , Duncan J. Maitland , Nicole Docherty , Thomas S. Wilson , Ward Small, IV , Jason Ortega , Pooja Singhal
IPC: C08J9/36 , A61L24/00 , A61L24/04 , B05D1/00 , B05D3/14 , B05D7/02 , B29C59/14 , B32B27/06 , B32B5/18 , A61L31/14 , A61L31/06 , B29K33/04 , B29C44/56 , B29K69/00 , B29K75/00 , B29K77/00
Abstract: An embodiment includes a system comprising: a monolithic shape memory polymer (SMP) foam having first and second states; wherein the SMP foam includes: (a) polyurethane, (b) an inner half portion having inner reticulated cells defined by inner struts, (c) an outer half portion, having outer reticulated cells defined by outer struts, surrounding the inner portion in a plane that provides a cross-section of the SMP foam, (d) hydroxyl groups chemically bound to outer surfaces of both the inner and outer struts. Other embodiments are discussed herein.
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8.发明申请公开(公告)号：US20200253616A1
公开(公告)日：2020-08-13
申请号：US16776638
申请日：2020-01-30
Inventor： Anthony Boyle , Keith Hearon , Duncan J. Maitland , Landon D. Nash , Thomas S. Wilson
Abstract: An embodiment of the invention is a shape memory polymer (SMP) foam designed to recover its original shape through exposure to a solvent. Thermo-responsive SMPs are polymers designed to maintain a programmed secondary shape until heated above their transition temperature, upon which the polymer recovers its original, or primary, shape. The thermo-responsive SMP foam is programmed to its secondary shape prior to use, typically compression of the foam to a small volume, and remains in this programmed shape until exposed to a selected solvent such as dimethyl sulfoxide or ethyl alcohol. Upon exposure to the solvent, the transition temperature of the SMP foam decreases below the temperature of the environment and the SMP foam actuates to its primary shape. The SMP foam is tailored to actuate upon exposure to specific solvents while minimizing or preventing actuation when exposed to water or other solvents. This selective solvent actuation can be used to increase working time of a SMP foam device, that is, the time allowed for use of a device without undesired actuation, while maintaining functional SMP actuation. Solvent actuated SMP foams can be used in various applications including, but not limited to, treatment of aneurysms and arteriovenous malformations, tissue engineering, and wound healing.
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公开(公告)号：US20180009932A1
公开(公告)日：2018-01-11
申请号：US15548212
申请日：2016-02-02
Inventor： Keith Hearon , Landon D. Nash , Thomas Wilson , Duncan J. Maitland , Mark A. Wierzbicki
IPC: C08G18/32 , C08G18/67 , C08G18/75 , B29K105/04
CPC classification number: C08G18/3206 , B29K2105/04 , C08G18/3212 , C08G18/6715 , C08G18/675 , C08G18/73 , C08G18/758 , C08L75/04 , C08L75/16 , C08L81/02
Abstract: An embodiment includes a platform shape memory polymer system. Such an embodiment exhibits a blend of tunable, high performance mechanical attributes in combination with advanced processing capabilities and good biocompatibility. A post-polymerization crosslinking synthetic approach is employed that combines polyurethane and thiol-ene synthetic processes. Other embodiments are described herein.
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公开(公告)号：US20230098681A1
公开(公告)日：2023-03-30
申请号：US17956236
申请日：2022-09-29
Inventor： Landon D. Nash , Duncan J. Maitland , Nicole Docherty , Thomas S. Wilson , Ward Small, IV , Jason Ortega , Pooja Singhal
IPC: C08J9/36 , B29C59/14 , B32B27/06 , B32B5/18 , A61L31/14 , A61L31/06 , A61L24/00 , A61L24/04 , B05D1/00 , B05D3/14 , B05D7/02
Abstract: An embodiment includes a system comprising: a monolithic shape memory polymer (SMP) foam having first and second states; wherein the SMP foam includes: (a) polyurethane, (b) an inner half portion having inner reticulated cells defined by inner struts, (c) an outer half portion, having outer reticulated cells defined by outer struts, surrounding the inner portion in a plane that provides a cross-section of the SMP foam, (d) hydroxyl groups chemically bound to outer surfaces of both the inner and outer struts. Other embodiments are discussed herein.
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