Patents by Inventor Kamal Ramzipoor
Kamal Ramzipoor 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: 11931484Abstract: A bioabsorbable composite stent structure, comprising bioabsorbable polymeric ring structures which retain a molecular weight and mechanical strength of a starting substrate and one or more interconnecting struts which extend between and couple adjacent ring structures. The ring structures can have a formed first diameter and being radially compressible to a smaller second diameter and re-expandable to the first diameter. The ring structures can comprise a base polymeric layer. The interconnecting struts can be formed from a polymer blend or co-polymer of poly-L-lactide (PLLA) and an elastomeric polymer. The interconnecting struts each can have a width that is less than a circumference of one of the ring structures. The adjacent ring structures can be axially and rotationally movable relative to one another via the interconnecting struts. The interconnecting struts can also be bioabsorbable.Type: GrantFiled: January 15, 2021Date of Patent: March 19, 2024Assignee: Razmodics LLCInventors: Kamal Ramzipoor, Richard J. Saunders
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Publication number: 20230414385Abstract: Various endovascular scaffolds and methods of making and using the endovascular scaffolds are disclosed. In one variation, an endovascular scaffold is disclosed comprising a plurality of undulating rings and a plurality of interconnecting struts connecting the plurality of undulating rings to one another. The plurality of undulating rings can be radially compressible into a delivery configuration and expandable from the delivery configuration to an expanded configuration when deployed. At least some of the interconnecting struts can biodegrade after the endovascular scaffold is deployed within the peripheral vessel.Type: ApplicationFiled: May 26, 2023Publication date: December 28, 2023Inventors: Kamal RAMZIPOOR, Afsoon FALLAHI
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Publication number: 20230190500Abstract: Post deployment radial force recovery of biodegradable scaffolds are described where a high molecular weight polymer may be formed into a high molecular weight scaffold by solution casting into a tubular substrate such that the scaffold retains its mechanical properties through processing. The tubular substrate is laser cut and subsequently crimped onto a catheter for deployment into a body lumen. The polymeric scaffold may retain its mechanical properties and result in increased radial strength post-deployment in a saline environment, e.g., within a body lumen. This scaffold enhancement may be attributable at least in part to entanglement of high molecular weight polymer chains as one factor that effects radial force recovery and also to the design or geometry of the scaffold as another factor that effects radial force recovery after deployment.Type: ApplicationFiled: February 22, 2023Publication date: June 22, 2023Applicant: Razmodics LLCInventors: Kamal RAMZIPOOR, Chang Y. LEE
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Patent number: 11628077Abstract: Post deployment radial force recovery of biodegradable scaffolds are described where a high molecular weight polymer may be formed into a high molecular weight scaffold by solution casting into a tubular substrate such that the scaffold retains its mechanical properties through processing. The tubular substrate is laser cut and subsequently crimped onto a catheter for deployment into a body lumen. The polymeric scaffold may retain its mechanical properties and result in increased radial strength post-deployment in a saline environment, e.g., within a body lumen. This scaffold enhancement may be attributable at least in part to entanglement of high molecular weight polymer chains as one factor that effects radial force recovery and also to the design or geometry of the scaffold as another factor that effects radial force recovery after deployment.Type: GrantFiled: October 31, 2016Date of Patent: April 18, 2023Assignee: Razmodics LLCInventors: Kamal Ramzipoor, Chang Y. Lee
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Publication number: 20210128796Abstract: A bioabsorbable composite stent structure, comprising bioabsorbable polymeric ring structures which retain a molecular weight and mechanical strength of a starting substrate and one or more interconnecting struts which extend between and couple adjacent ring structures. The ring structures can have a formed first diameter and being radially compressible to a smaller second diameter and re-expandable to the first diameter. The ring structures can comprise a base polymeric layer. The interconnecting struts can be formed from a polymer blend or co-polymer of poly-L-lactide (PLLA) and an elastomeric polymer. The interconnecting struts each can have a width that is less than a circumference of one of the ring structures. The adjacent ring structures can be axially and rotationally movable relative to one another via the interconnecting struts. The interconnecting struts can also be bioabsorbable.Type: ApplicationFiled: January 15, 2021Publication date: May 6, 2021Applicant: Razmodics LLCInventors: Kamal RAMZIPOOR, Richard J. SAUNDERS
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Patent number: 10898620Abstract: A bioabsorbable composite stent structure, comprising bioabsorbable polymeric ring structures which retain a molecular weight and mechanical strength of a starting substrate and one or more interconnecting struts which extend between and couple adjacent ring structures. The ring structures can have a formed first diameter and being radially compressible to a smaller second diameter and re-expandable to the first diameter. The ring structures can comprise a base polymeric layer. The interconnecting struts can be formed from a polymer blend or co-polymer of poly-L-lactide (PLLA) and an elastomeric polymer. The interconnecting struts each can have a width that is less than a circumference of one of the ring structures. The adjacent ring structures can be axially and rotationally movable relative to one another via the interconnecting struts. The interconnecting struts can also be bioabsorbable.Type: GrantFiled: June 15, 2017Date of Patent: January 26, 2021Assignee: Razmodics LLCInventors: Kamal Ramzipoor, Richard J. Saunders
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Patent number: 10893960Abstract: Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.Type: GrantFiled: September 18, 2013Date of Patent: January 19, 2021Assignee: Razmodics LLCInventors: Kamal Ramzipoor, Alfred N. K. Chia, Liwei Wang
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Patent number: 10646359Abstract: Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.Type: GrantFiled: May 21, 2012Date of Patent: May 12, 2020Assignee: Amaranth Medical Pte.Inventors: Kamal Ramzipoor, Alfred N. K. Chia, Liwei Wang
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Publication number: 20180116837Abstract: Post deployment radial force recovery of biodegradable scaffolds are described where a high molecular weight polymer may be formed into a high molecular weight scaffold by solution casting into a tubular substrate such that the scaffold retains its mechanical properties through processing. The tubular substrate is laser cut and subsequently crimped onto a catheter for deployment into a body lumen. The polymeric scaffold may retain its mechanical properties and result in increased radial strength post-deployment in a saline environment, e.g., within a body lumen. This scaffold enhancement may be attributable at least in part to entanglement of high molecular weight polymer chains as one factor that effects radial force recovery and also to the design or geometry of the scaffold as another factor that effects radial force recovery after deployment.Type: ApplicationFiled: October 31, 2016Publication date: May 3, 2018Inventors: Kamal RAMZIPOOR, Chang Y. LEE
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Patent number: 9908143Abstract: Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.Type: GrantFiled: May 21, 2012Date of Patent: March 6, 2018Assignee: Amaranth Medical Pte.Inventors: Kamal Ramzipoor, Alfred N. K. Chia, Liwei Wang, Chang Y. Lee
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Publication number: 20170281832Abstract: A bioabsorbable composite stent structure, comprising bioabsorbable polymeric ring structures which retain a molecular weight and mechanical strength of a starting substrate and one or more interconnecting struts which extend between and couple adjacent ring structures. The ring structures can have a formed first diameter and being radially compressible to a smaller second diameter and re-expandable to the first diameter. The ring structures can comprise a base polymeric layer. The interconnecting struts can be formed from a polymer blend or co-polymer of poly-L-lactide (PLLA) and an elastomeric polymer. The interconnecting struts each can have a width that is less than a circumference of one of the ring structures. The adjacent ring structures can be axially and rotationally movable relative to one another via the interconnecting struts. The interconnecting struts can also be bioabsorbable.Type: ApplicationFiled: June 15, 2017Publication date: October 5, 2017Inventors: Kamal RAMZIPOOR, Richard J. SAUNDERS
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Publication number: 20170246243Abstract: Bioresorbable scaffolds for treatment of bifurcation lesion are described herein. Generally, an expandable scaffold may be fabricated from a high molecular weight isotropic PLLA material, wherein the scaffold incorporates one or more strain relief features which are configured to allow side branch treatment.Type: ApplicationFiled: February 6, 2017Publication date: August 31, 2017Applicant: Amaranth Medical Pte.Inventors: Kamal RAMZIPOOR, Chang Y. LEE
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Publication number: 20170157806Abstract: Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.Type: ApplicationFiled: February 22, 2017Publication date: June 8, 2017Applicant: Amaranth Medical Pte.Inventors: Kamal RAMZIPOOR, Alfred N. K. CHIA, Liwei WANG
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Patent number: 9636115Abstract: A device for delivering an occlusive element includes an elongate sheath having a lumen therein. An elongate core member is disposed within the lumen and is formed from a proximal portion and distal portion connected via a joint. The distal portion of the elongate member includes a severable junction secured to the occlusive element. A marker coil is coaxially arranged around the distal portion of the elongate core member and is partially disposed inside the sheath lumen. A coil member is coaxially arranged around the distal portion of the elongate core member and coaxially arranged around at least a portion of the marker coil extending outside the lumen of the sheath. The coil member is secured at a distal end thereof to the distal portion of the elongate core member. The device resists axial compression while allowing for radial bending.Type: GrantFiled: June 13, 2006Date of Patent: May 2, 2017Assignees: Stryker Corporation, Stryker European Holdings I, LLCInventors: William S. Henry, Charles Daly, Russell Ford, Michael D. Williams, Hanh Duong, Hughie Devaney, Kamal Ramzipoor, Clifford Teoh, Richard Murphy, Andrew Huffmaster, Scott McGill
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Patent number: 9622754Abstract: The apparatus for deployment of a therapeutic device such as a micro-coil detachably mounts the therapeutic device to a distal portion of a pusher member. In one embodiment, the therapeutic device is detachably mounted to the distal portion of the pusher member by a connector fiber for securing the therapeutic device to the pusher member. The connector fiber passes through a cutter member such as a cutting ring within the distal portion of the pusher member, for cutting the connector fiber to release the therapeutic device when a desired placement of the therapeutic device within the vasculature is achieved.Type: GrantFiled: May 12, 2006Date of Patent: April 18, 2017Assignee: DEPUY SYNTHES PRODUCTS, INC.Inventors: Kamal Ramzipoor, Tom Holdych
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Patent number: 9592141Abstract: Bioresorbable scaffolds for treatment of bifurcation lesion are described herein. Generally, an expandable scaffold may be fabricated from a high molecular weight isotropic PLLA material, wherein the scaffold incorporates one or more strain relief features which are configured to allow side branch treatment.Type: GrantFiled: July 17, 2014Date of Patent: March 14, 2017Assignee: Amaranth Medical, Inc.Inventors: Kamal Ramzipoor, Chang Y. Lee
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Publication number: 20150342764Abstract: Tubular casting processes, such as dip-coating, may be used to form substrates from polymeric solutions which may be used to fabricate implantable devices such as stents. The polymeric substrates may have multiple layers which retain the inherent properties of their starting materials and which are sufficiently ductile to prevent brittle fracture. Parameters such as the number of times the mandrel is immersed, the duration of time of each immersion within the solution, as well as the delay time between each immersion or the drying or curing time between dips and withdrawal rates of the mandrel from the solution may each be controlled to result in the desired mechanical characteristics. Additional post-processing may also be utilized to further increase strength of the substrate or to alter its shape.Type: ApplicationFiled: May 18, 2015Publication date: December 3, 2015Applicant: Amaranth Medical Pte.Inventors: Kamal RAMZIPOOR, Chang Y. LEE
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Patent number: 8974513Abstract: An implant assembly comprises an elongated pusher member, and an implantable device (e.g., a vaso-occlusive device) mounted to the distal end of the pusher member. The implant assembly further comprises an electrolytically severable joint disposed on the pusher member, wherein the implantable device detaches from the pusher member when the severable joint is severed, and a return electrode carried by the distal end of the pusher member (e.g., a coil disposed about the pusher member) in proximity to, but electrically isolated from, the severable joint. The implant assembly further comprises a terminal carried by the proximal end of the pusher member in electrical communication with the severable joint.Type: GrantFiled: July 2, 2012Date of Patent: March 10, 2015Assignees: Stryker Corporation, Stryker NV Operations LimitedInventors: Russell Ford, Scott McGill, Clifford Teoh, Michael Williams, Kamal Ramzipoor, Like Que, Ann Huang, Elena Oo, Christina Ma, Stella Chu
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Publication number: 20150051686Abstract: Bioresorbable scaffolds for treatment of bifurcation lesion are described herein. Generally, an expandable scaffold may be fabricated from a high molecular weight isotropic PLLA material, wherein the scaffold incorporates one or more strain relief features which are configured to allow side branch treatment.Type: ApplicationFiled: July 17, 2014Publication date: February 19, 2015Applicant: Amaranth Medical Pte.Inventors: Kamal RAMZIPOOR, Chang Y. LEE
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Publication number: 20140330359Abstract: For scaffolds delivered and deployed intravascularly, one or several configurations may be employed for creating a smoother transition from balloon-to-scaffold. For instance, one or more spacers may be positioned in proximity to the scaffold. Alternatively, portions of the inflatable balloon may be configured to provide a smooth transition. In another alternative, the stent edges may be shaped to provide a smooth transition. In yet other variations, any number of different combinations of such features may be employed.Type: ApplicationFiled: April 14, 2014Publication date: November 6, 2014Applicant: AMARANTH MEDICAL PTE.Inventors: Kamal RAMZIPOOR, Chang Y. LEE, Edward A. ESTRADA