Patents by Inventor Duncan Maitland
Duncan Maitland 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: 20220370086Abstract: An embolectomy device comprised of an expansion unit and a support unit is disclosed. The expansion unit can be actuated in response to one or more external stimuli, and the support unit, located proximately to the expansion unit, provides a force to hold the expansion unit in place and to further induce the expansion unit's radial expansion. The radial expansion of the expansion unit causes the expansion unit to physically contact a blood clot, enabling the blood clot to be removed. In some embodiments, the expansion unit can be fabricated from a shape memory polymer foam. In some embodiments the support unit can be fabricated from any elastic material including, without limitation, shape memory alloys.Type: ApplicationFiled: August 5, 2022Publication date: November 24, 2022Inventors: Jason Szafron, Duncan Maitland, Ward Small, IV, Patrick R. Buckley, Andrea D. Muschenborn
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Publication number: 20220304667Abstract: A device for a tissue channel includes a device frame, a shape memory polymer foam segment coupled to the device frame, and an attachment structure coupled to the device frame. The device frame includes a proximal structure, a distal structure, and an intermediate structure coupled to the proximal structure and the distal structure. The proximal structure is configured to collapse to fit into a delivery structure and expand to block migration of the proximal structure. The distal structure is configured to collapse to fit into the delivery structure and expand to block migration of the distal structure. The intermediate structure is configured to fit in the tissue channel upon device deployment. The shape memory polymer foam segment is configured to compress to fit into the delivery structure and occlude the channel. The attachment structure is configured to attach and detach the device from a delivery guide.Type: ApplicationFiled: June 10, 2022Publication date: September 29, 2022Inventors: Mark A. Wierzbicki, Duncan Maitland, Matthew W. Miller, Andrea D. Muschenborn, Landon Nash, Jason M. Szafron, Todd Landsman
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Patent number: 11406401Abstract: An embolectomy device comprised of an expansion unit and a support unit is disclosed. The expansion unit can be actuated in response to one or more external stimuli, and the support unit, located proximately to the expansion unit, provides a force to hold the expansion unit in place and to further induce the expansion unit's radial expansion. The radial expansion of the expansion unit causes the expansion unit to physically contact a blood clot, enabling the blood clot to be removed. In some embodiments, the expansion unit can be fabricated from a shape memory polymer foam. In some embodiments the support unit can be fabricated from any elastic material including, without limitation, shape memory alloys.Type: GrantFiled: December 3, 2019Date of Patent: August 9, 2022Assignees: Lawrence Livermore National Security, LLC, The Texas A&M University SystemInventors: Jason Szafron, Duncan Maitland, Ward Small, IV, Patrick R. Buckley, Andrea D. Muschenborn
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Patent number: 11357488Abstract: A device for a tissue channel includes a device frame, a shape memory polymer foam segment coupled to the device frame, and an attachment structure coupled to the device frame. The device frame includes a proximal structure, a distal structure, and an intermediate structure coupled to the proximal structure and the distal structure. The proximal structure is configured to collapse to fit into a delivery structure and expand to block migration of the proximal structure. The distal structure is configured to collapse to fit into the delivery structure and expand to block migration of the distal structure. The intermediate structure is configured to fit in the tissue channel upon device deployment. The shape memory polymer foam segment is configured to compress to fit into the delivery structure and occlude the channel. The attachment structure is configured to attach and detach the device from a delivery guide.Type: GrantFiled: January 24, 2020Date of Patent: June 14, 2022Assignee: THE TEXAS A&M UNIVERSITY SYSTEMInventors: Mark A. Wierzbicki, Duncan Maitland, Matthew W. Miller, Andrea D. Muschenborn, Landon Nash, Jason M. Szafron, Todd Landsman
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Publication number: 20220105249Abstract: An embodiment includes a shape memory polymer (SMP) foam with visibility under both X-ray and magnetic resonance imaging (MRI) modalities. Dual modality visibility is achieved by chemically incorporating monomers with X-ray visible iodine-motifs and MRI visible monomers with gadolinium content. This material platform has the potential to be used in a variety of medical devices.Type: ApplicationFiled: October 6, 2021Publication date: April 7, 2022Inventors: Grace Fletcher, Duncan Maitland, Landon Nash, Todd Landsman, Chung Yeh, Edward Ruppel, Meghan Reu
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Publication number: 20210113741Abstract: Tumor resection is commonly practiced to prevent the progression of cancer. However, there are post-surgery concerns including the formation of a void that can allow cancer cells to escape at the surgery site, which increases the risk of metastasis. To counter this challenge, an embodiment includes a polyurethane-based shape memory foam as a tissue void-filling device that can also release anti-cancer drugs. Such foams may activate at body temperature and become malleable. Such properties may enable the foam to be shaped to precisely seal the tissue void and then serve as a drug-eluting device. Based on the drug composition with poly vinyl alcohol (PVA), the drug release profile from the foam may be altered depending on the application.Type: ApplicationFiled: October 16, 2020Publication date: April 22, 2021Inventors: Duncan Maitland, Corey Bishop, Shreedevi Arun Kumar
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Publication number: 20200155131Abstract: A device for a tissue channel includes a device frame, a shape memory polymer foam segment coupled to the device frame, and an attachment structure coupled to the device frame. The device frame includes a proximal structure, a distal structure, and an intermediate structure coupled to the proximal structure and the distal structure. The proximal structure is configured to collapse to fit into a delivery structure and expand to block migration of the proximal structure. The distal structure is configured to collapse to fit into the delivery structure and expand to block migration of the distal structure. The intermediate structure is configured to fit in the tissue channel upon device deployment. The shape memory polymer foam segment is configured to compress to fit into the delivery structure and occlude the channel. The attachment structure is configured to attach and detach the device from a delivery guide.Type: ApplicationFiled: January 24, 2020Publication date: May 21, 2020Inventors: Mark A. Wierzbicki, Duncan Maitland, Matthew W. Miller, Andrea D. Muschenborn, Landon Nash, Jason M. Szafron, Todd Landsman
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Publication number: 20200107841Abstract: An embolectomy device comprised of an expansion unit and a support unit is disclosed. The expansion unit can be actuated in response to one or more external stimuli, and the support unit, located proximately to the expansion unit, provides a force to hold the expansion unit in place and to further induce the expansion unit's radial expansion. The radial expansion of the expansion unit causes the expansion unit to physically contact a blood clot, enabling the blood clot to be removed. In some embodiments, the expansion unit can be fabricated from a shape memory polymer foam. In some embodiments the support unit can be fabricated from any elastic material including, without limitation, shape memory alloys.Type: ApplicationFiled: December 3, 2019Publication date: April 9, 2020Inventors: Jason Szafron, Duncan Maitland, Ward Small, IV, Patrick R. Buckley, Andrea D. Muschenborn
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Patent number: 10555737Abstract: A device for a tissue channel includes a device frame, a shape memory polymer foam segment coupled to the device frame, and an attachment structure coupled to the device frame. The device frame includes a proximal structure, a distal structure, and an intermediate structure coupled to the proximal structure and the distal structure. The proximal structure is configured to collapse to fit into a delivery structure and expand to block migration of the proximal structure. The distal structure is configured to collapse to fit into the delivery structure and expand to block migration of the distal structure. The intermediate structure is configured to fit in the tissue channel upon device deployment. The shape memory polymer foam segment is configured to compress to fit into the delivery structure and occlude the channel. The attachment structure is configured to attach and detach the device from a delivery guide.Type: GrantFiled: April 22, 2016Date of Patent: February 11, 2020Assignee: The Texas A&M University SystemInventors: Mark A. Wierzbicki, Duncan Maitland, Matthew W. Miller, Andrea D. Muschenborn, Landon Nash, Jason M. Szafron, Todd Landsman
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Patent number: 10499935Abstract: An embolectomy device comprised of an expansion unit and a support unit is disclosed. The expansion unit can be actuated in response to one or more external stimuli, and the support unit, located proximately to the expansion unit, provides a force to hold the expansion unit in place and to further induce the expansion unit's radial expansion. The radial expansion of the expansion unit causes the expansion unit to physically contact a blood clot, enabling the blood clot to be removed. In some embodiments, the expansion unit can be fabricated from a shape memory polymer foam. In some embodiments the support unit can be fabricated from any elastic material including, without limitation, shape memory alloys.Type: GrantFiled: April 8, 2016Date of Patent: December 10, 2019Assignee: Lawrence Livermore National Security, LLCInventors: Jason Szafron, Duncan Maitland, Ward Small, IV, Patrick Buckley, Andrea D. Muschenborn
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Publication number: 20180132856Abstract: A device for a tissue channel includes a device frame, a shape memory polymer foam segment coupled to the device frame, and an attachment structure coupled to the device frame. The device frame includes a proximal structure, a distal structure, and an intermediate structure coupled to the proximal structure and the distal structure. The proximal structure is configured to collapse to fit into a delivery structure and expand to block migration of the proximal structure. The distal structure is configured to collapse to fit into the delivery structure and expand to block migration of the distal structure. The intermediate structure is configured to fit in the tissue channel upon device deployment. The shape memory polymer foam segment is configured to compress to fit into the delivery structure and occlude the channel. The attachment structure is configured to attach and detach the device from a delivery guide.Type: ApplicationFiled: April 22, 2016Publication date: May 17, 2018Inventors: Mark A. Wierzbicki, Duncan Maitland, Matthew W. Miller, Andrea D. Muschenborn, Landon Nash, Jason M. Szafron, Todd Landsman
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Publication number: 20160317166Abstract: An embolectomy device comprised of an expansion unit and a support unit is disclosed. The expansion unit can be actuated in response to one or more external stimuli, and the support unit, located proximately to the expansion unit, provides a force to hold the expansion unit in place and to further induce the expansion unit's radial expansion. The radial expansion of the expansion unit causes the expansion unit to physically contact a blood clot, enabling the blood clot to be removed. In some embodiments, the expansion unit can be fabricated from a shape memory polymer foam. In some embodiments the support unit can be fabricated from any elastic material including, without limitation, shape memory alloys.Type: ApplicationFiled: April 8, 2016Publication date: November 3, 2016Inventors: Jason Szafron, Duncan Maitland, Ward Small, IV, Patrick Buckley, Andrea D. Müschenborn
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Patent number: 7744604Abstract: A system for removing matter from a conduit. The system includes the steps of passing a transport vehicle and a shape memory polymer material through the conduit, transmitting energy to the shape memory polymer material for moving the shape memory polymer material from a first shape to a second and different shape, and withdrawing the transport vehicle and the shape memory polymer material through the conduit carrying the matter.Type: GrantFiled: June 30, 2005Date of Patent: June 29, 2010Assignee: Lawrence Livermore National Security, LLCInventors: Duncan Maitland, William J. Benett, Jane P. Bearinger, Thomas S. Wilson, Ward Small, IV, Daniel L. Schumann, Wayne A. Jensen, Jason M. Ortega, John E. Marion, III, Jeffrey M. Loge
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Publication number: 20080019657Abstract: A system for diffusing light from an optical fiber wherein the optical fiber is coupled to a light source, comprising forming a polymer element adapted to be connected to the optical fiber and incorporating a scattering element with the polymer element wherein the scattering element diffuses the light from the polymer element. The apparatus of the present invention comprises a polymer element operatively connected to the optical fiber and a scattering element operatively connected with the shape polymer element that diffuses the light from the polymer element.Type: ApplicationFiled: July 18, 2006Publication date: January 24, 2008Inventors: Duncan Maitland, Ward Small, Thomas Wilson, William Benett
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Publication number: 20070135907Abstract: A stent for treating a physical anomaly. The stent includes a skeletal support structure for expanding in the physical anomaly and a shape memory material coupled to the skeletal support structure.Type: ApplicationFiled: November 29, 2006Publication date: June 14, 2007Inventors: Thomas Wilson, Duncan Maitland, Ward Small, Patrick Buckley, William Benett, Jonathan Hartman, David Saloner
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Publication number: 20060009785Abstract: A system for removing matter from a conduit. The system includes the steps of passing a transport vehicle and a shape memory polymer material through the conduit, transmitting energy to the shape memory polymer material for moving the shape memory polymer material from a first shape to a second and different shape, and withdrawing the transport vehicle and the shape memory polymer material through the conduit carrying the matter.Type: ApplicationFiled: June 30, 2005Publication date: January 12, 2006Inventors: Duncan Maitland, William Benett, Jane Bearinger, Thomas Wilson, Ward Small, Daniel Schumann, Wayne Jensen, Jason Ortega, John Marion, Jeffrey Loge
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Publication number: 20050212630Abstract: A shape memory material with integrated actuation using embedded particles. One embodiment provides a shape memory material apparatus comprising a shape memory material body and magnetic pieces in the shape memory material body. Another embodiment provides a method of actuating a device to perform an activity on a subject comprising the steps of positioning a shape memory material body in a desired position with regard to the subject, the shape memory material body capable of being formed in a specific primary shape, reformed into a secondary stable shape, and controllably actuated to recover the specific primary shape; including pieces in the shape memory material body; and actuating the shape memory material body using the pieces causing the shape memory material body to be controllably actuated to recover the specific primary shape and perform the activity on the subject.Type: ApplicationFiled: March 26, 2004Publication date: September 29, 2005Inventors: Patrick Buckley, Duncan Maitland
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Publication number: 20050182428Abstract: Systems for closure of a physical anomaly. Closure is accomplished by a closure body with an exterior surface. The exterior surface contacts the opening of the anomaly and closes the anomaly. The closure body has a primary shape for closing the anomaly and a secondary shape for being positioned in the physical anomaly. The closure body preferably comprises a shape memory polymer.Type: ApplicationFiled: February 17, 2004Publication date: August 18, 2005Inventors: Jane Bearinger, Duncan Maitland, Daniel Schumann, Thomas Wilson
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Publication number: 20050075405Abstract: A system for occluding a physical anomaly. One embodiment comprises a shape memory material body wherein the shape memory material body fits within the physical anomaly occluding the physical anomaly. The shape memory material body has a primary shape for occluding the physical anomaly and a secondary shape for being positioned in the physical anomaly.Type: ApplicationFiled: March 15, 2004Publication date: April 7, 2005Inventors: Thomas Wilson, Duncan Maitland
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Publication number: 20050021013Abstract: Partial or total occlusions of fluid passages within the human body are removed by positioning an array of optical fibers in the passage and directing treatment radiation pulses along the fibers, one at a time, to generate a shock wave and hydrodynamic flows that strike and emulsify the occlusions. A preferred application is the removal of blood clots (thrombi and emboli) from small cerebral vessels to reverse the effects of an ischemic stroke. The operating parameters and techniques are chosen to minimize the amount of heating of the fragile cerebral vessel walls occurring during this photoacoustic treatment. One such technique is the optical monitoring of the existence of hydrodynamic flow generating vapor bubbles when they are expected to occur and stopping the heat generating pulses propagated along an optical fiber that is not generating such bubbles.Type: ApplicationFiled: September 10, 2002Publication date: January 27, 2005Inventors: Steven Visuri, Luiz Da Silva, Peter Celliers, Richard London, Duncan Maitland, Victor Esch