Patents by Inventor Richard J. Saunders
Richard J. Saunders 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: 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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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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Patent number: 8034098Abstract: An apparatus is described for supporting and/or constricting a surface of a valve annulus. The apparatus includes a tubular member of dimensions suitable for insertion into a body vessel. The tubular member includes at least two first segments attachable to an interior wall of the body vessel. The tubular member further includes at least one second segment which is capable of decreasing its axial length to draw one of the first segments towards the other first segment.Type: GrantFiled: September 28, 2006Date of Patent: October 11, 2011Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Peter L. Callas, Richard J. Saunders
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Publication number: 20100042202Abstract: Composite stent structures having multi-axial flexibility are described where the composite stent may have one or more layers of bioabsorbable polymers fabricated with the desired characteristics for implantation within a vessel. A number of individual ring structures separated from one another may be encased between a base polymeric layer and an overlaid polymeric layer such that the rings are coupled to one another via elastomeric segments which enable the composite stent to flex axially and rotationally along with the vessel. Each layer may have a characteristic that individually provides a certain aspect of mechanical behavior to the composite stent such that the aggregate layers form a composite polymeric stent structure capable of withstanding complex, multi-axial loading conditions imparted by an anatomical environment such as the SFA.Type: ApplicationFiled: August 13, 2009Publication date: February 18, 2010Inventors: Kamal RAMZIPOOR, Richard J. SAUNDERS
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Patent number: 7645409Abstract: The present invention is directed to an expandable polymer link hybrid stent for implantation in a body lumen, such as a coronary artery along with a method of making the stent. The stent generally includes a series of metallic cylindrical rings longitudinally aligned on a common axis of the stent and interconnected by a series of polymeric links. The polymer links are formed by applying polymer layers between the rings and laser ablating the excess material. The polymeric material forming the polymeric links, provides longitudinal and flexural flexibility to the stent while maintaining sufficient column strength to space the cylindrical rings along the longitudinal axis. The metallic material forming the rings provides the necessary radial stiffness.Type: GrantFiled: October 3, 2008Date of Patent: January 12, 2010Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Richard J. Saunders, Joseph R. Callol, James Hong
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Publication number: 20090029030Abstract: The present invention is directed to an expandable polymer link hybrid stent for implantation in a body lumen, such as a coronary artery along with a method of making the stent. The stent generally includes a series of metallic cylindrical rings longitudinally aligned on a common axis of the stent and interconnected by a series of polymeric links. The polymer links are formed by applying polymer layers between the rings and laser ablating the excess material. The polymeric material forming the polymeric links, provides longitudinal and flexural flexibility to the stent while maintaining sufficient column strength to space the cylindrical rings along the longitudinal axis. The metallic material forming the rings provides the necessary radial stiffness.Type: ApplicationFiled: October 3, 2008Publication date: January 29, 2009Applicant: ADVANCED CARDIOVASCULAR SYSTEMS, INC.Inventors: Richard J. Saunders, Joseph R. Callol, James Hong
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Patent number: 7455687Abstract: The present invention is directed to an expandable polymer link hybrid stent for implantation in a body lumen, such as a coronary artery along with a method of making the stent. The stent generally includes a series of metallic cylindrical rings longitudinally aligned on a common axis of the stent and interconnected by a series of polymeric links. The polymer links are formed by applying polymer layers between the rings and laser ablating the excess material. The polymeric material forming the polymeric links, provides longitudinal and flexural flexibility to the stent while maintaining sufficient column strength to space the cylindrical rings along the longitudinal axis. The metallic material forming the rings provides the necessary radial stiffness.Type: GrantFiled: December 30, 2002Date of Patent: November 25, 2008Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Richard J. Saunders, Joseph R. Callol, James Hong
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Patent number: 6777644Abstract: An intraluminal catheter which provides access to distal locations within a patient's body lumen and which is provided with a flexible distal section having an inner lining, an outer jacket or coating and a helical coil between the lining and jacket. The distal section of the catheter is quite flexible yet it has sufficient transverse or radial rigidity to prevent significant distortion of the transverse cross-sectional shape of the catheter.Type: GrantFiled: May 30, 2002Date of Patent: August 17, 2004Assignee: Advanced Cardiovascular Systems, Inc.Inventors: James C. Peacock, III, Richard J. Saunders
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Publication number: 20040127970Abstract: The present invention is directed to an expandable polymer link hybrid stent for implantation in a body lumen, such as a coronary artery along with a method of making the stent. The stent generally includes a series of metallic cylindrical rings longitudinally aligned on a common axis of the stent and interconnected by a series of polymeric links. The polymer links are formed by applying polymer layers between the rings and laser ablating the excess material. The polymeric material forming the polymeric links, provides longitudinal and flexural flexibility to the stent while maintaining sufficient column strength to space the cylindrical rings along the longitudinal axis. The metallic material forming the rings provides the necessary radial stiffness.Type: ApplicationFiled: December 30, 2002Publication date: July 1, 2004Inventors: Richard J. Saunders, Joseph R. Callol, James Hong
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Publication number: 20040098116Abstract: An apparatus is described for supporting and/or constricting a surface of a valve annulus. The apparatus includes a tubular member of dimensions suitable for insertion into a body vessel. The tubular member includes at least two first segments attachable to an interior wall of the body vessel. The tubular member further includes at least one second segment which is capable of decreasing its axial length to draw one of the first segments towards the other first segment.Type: ApplicationFiled: November 15, 2002Publication date: May 20, 2004Inventors: Peter L. Callas, Richard J. Saunders
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Patent number: 6576006Abstract: A stent-delivery catheter system delivers and implants a self-expanding stent intraluminally into a human patient's body lumen. A self-expanding stent is removabaly attached to the distal end of an inner member so that attachment projections prevent axial movement of the stent on the inner member while the stent is being delivered and implanted in a patient's body lumen.Type: GrantFiled: September 6, 2001Date of Patent: June 10, 2003Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Timothy A. Limon, Richard J. Saunders
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Patent number: 6569192Abstract: The invention is directed to a system for removably securing a stent which generally includes an expandable member of a catheter assembly, the expandable member having outwardly extending protrusions. An expandable stent is crimped onto the expandable member such that the protrusions extend into the gaps in the stent. The stent is secured in place on the expandable member while advancing the system through tortuous body lumen passages. The stent is implanted at the desired location in the body lumen by inflating the expandable member and thereby expanding the stent into the body lumen. The protrusions are pulled away from and out of the stent gaps by deflating the expandable member and retracting the remainder of the system.Type: GrantFiled: August 18, 2000Date of Patent: May 27, 2003Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Philip C. Foreman, Timothy A. Limon, Richard J. Saunders, Björn G. Svensson, Gregory W. Teaby, II
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Patent number: 6537480Abstract: A method of forming a catheter shaft having a flexible section by selective removal of catheter shaft material using laser radiation, and a catheter produced therefrom. The laser radiation is of an ultraviolet wavelength. The catheter shaft is made more flexible without a disadvantageous decrease in column strength by operating the laser in the UV, which allows for machining recess patterns with smooth and repeatable recess surfaces while producing little or no thermal or mechanical effects on the remaining adjacent polymeric material.Type: GrantFiled: October 18, 2000Date of Patent: March 25, 2003Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Jon A. Becker, Richard J. Saunders
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Publication number: 20020193866Abstract: An improved expandable stent for implantation in a body lumen, such as an artery, and an improved method for making it from a single length of tubing. The stent consists of a plurality of radially expandable cut cylindrical elements generally aligned on a common axis and interconnected by one or more interconnective elements, the elements having a rectangular cross-section from cut-to-cut. The individual radially expandable cylindrical elements are disposed in an undulating pattern. The stent is manufactured by direct laser cutting from a single metal tube using a finely focused laser beam passing through a coaxial gas jet structure to impinge on the working surface of the tube as the linear and rotary velocity of the tube is precisely controlled.Type: ApplicationFiled: April 5, 2002Publication date: December 19, 2002Inventor: Richard J. Saunders
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Patent number: 6478807Abstract: A catheter assembly is provided for use in delivering and implanting a stent in a body lumen, such as in a coronary artery. An elongated catheter body includes an expandable member or balloon having a folded configuration and an expanded configuration wherein a plurality of pre-formed grooves extending generally circumferentially around the balloon when the balloon is in its folded configuration. An intravascular stent is removably crimped over the balloon and is at least partially retained on the balloon by the grooves. Upon inflation of the balloon, the grooves will flatten out thereby releasing the stent and allowing the stent to expand radially outwardly into contact with the body lumen or coronary artery.Type: GrantFiled: June 8, 2000Date of Patent: November 12, 2002Assignee: Advanced Cardiovascular Systems, Inc.Inventors: Philip C. Foreman, Timothy A. Limon, Richard J. Saunders, Björn G. Svensson, Gregory W. Teaby, II
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Publication number: 20020139785Abstract: An intraluminal catheter which provides access to distal locations within a patient's body lumen and which is provided with a flexible distal section having an inner lining, an outer jacket or coating and a helical coil between the lining and jacket. The distal section of the catheter is quite flexible yet it has sufficient transverse or radial rigidity to prevent significant distortion of the transverse cross-sectional shape of the catheter.Type: ApplicationFiled: May 30, 2002Publication date: October 3, 2002Inventors: James C. Peacock, Richard J. Saunders
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Patent number: 6369355Abstract: An improved expandable stent for implantation in a body lumen, such as an artery, and an improved method for making it from a single length of tubing. The stent consists of a plurality of radially expandable cut cylindrical elements generally aligned on a common axis and interconnected by one or more interconnective elements, the elements having a rectangular cross-section from cut-to-cut. The individual radially expandable cylindrical elements are disposed in an undulating pattern. The stent is manufactured by direct laser cutting from a single metal tube using a finely focused laser beam passing through a coaxial gas jet structure to impinge on the working surface of the tube as the linear and rotary velocity of the tube is precisely controlled.Type: GrantFiled: October 13, 2000Date of Patent: April 9, 2002Assignee: Advance Cardiovascular Systems, Inc.Inventor: Richard J. Saunders
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Publication number: 20020013599Abstract: A stent-delivery catheter system delivers and implants a self-expanding stent intraluminally into a human patient's body lumen. A self-expanding stent is removabaly attached to the distal end of an inner member so that attachment projections prevent axial movement of the stent on the inner member while the stent is being delivered and implanted in a patient's body lumen.Type: ApplicationFiled: September 6, 2001Publication date: January 31, 2002Inventors: Timothy A. Limon, Richard J. Saunders