Patents Assigned to Schneider (USA) Inc
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Patent number: 6295714Abstract: A body implantable stent is formed of a plurality of strands arranged in two sets of coaxial helices, wound in opposite directions to form multiple crossings. At selected crossings, the adjacent strands are welded to one another, while at the remaining crossings the strands are free for limited movement relative to one another. The welds are formed in patterns that preferably enhance radial strength and rigidity, while having a minimal impact on axial bending flexibility. Preferred weld patterns in this regard include rings or circumferential rows, and helices, particularly with a steeper pitch than that of the strands. Stent fabrication preferably involves resistance welding at the crossings, and use of a tool to reuniformly compress the stent around and against the distal end region of a balloon catheter used later to deliver the stent to a treatment site.Type: GrantFiled: February 22, 2000Date of Patent: October 2, 2001Assignee: Schneider (USA) IncInventors: Suranjan Roychowdhury, Leonard Pinchuk, Eugen Hofmann, Susanne Hankh, Michael G. O'Connor, Jennifer E. Raeder-Devens, Jeannine B. Baden, Daniel J. Klima
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Patent number: 6287506Abstract: A method for stretch blow molding dilatation balloons for angioplasty catheters having a significantly reduced cone thickness without sacrifice in burst strength is achieved by utilizing a mold whose cavity includes arcuate walls defining the balloon's end cones and a predetermined minimal distance from the side edges of the mold to the points where the arcuate walls intersect with a smaller diameter balloon stem portion. Utilizing this mold and providing for three longitudinal stretching sequences, one prior to, one during and one following radial expansion of the heated plastic parison, results in an improved balloon exhibiting reduced cone stiffness.Type: GrantFiled: July 9, 1998Date of Patent: September 11, 2001Assignee: Schneider (USA) Inc.Inventors: R. Garryl Hudgins, Robert C. Farnan
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Patent number: 6284305Abstract: A coating and method for a coating an implantable device or prostheses are disclosed. The coating includes an undercoat of polymeric material containing an amount of biologically active material, particularly heparin, dispersed therein. The coating further includes a topcoat which covers less than the entire surface of the undercoat and wherein the topcoat comprises a polymeric material substantially free of pores and porosigens. The polymeric material of the topcoat can be a biostable, biocompatible material which provides long term non-thrombogenicity to the device portion during and after release of the biologically active material.Type: GrantFiled: May 18, 2000Date of Patent: September 4, 2001Assignee: Schneider (USA) Inc.Inventors: Ni Ding, Michael N. Helmus
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Patent number: 6267775Abstract: A medical device for treating a body vessel with a radioactive source includes an elongated tubular catheter and an axially flexible support structure on a distal end of the catheter. The catheter has proximal and distal ends, and a lumen for receiving a radioactive source. The support structure is formed from a plurality of filaments which are helically wound and interwoven in a braided configuration and has a plurality of alternately spaced unconstricted and constricted regions. The unconstricted regions are radially compressible and self-expandable from a positioning diameter when the device is in a positioning state to a vessel-engaging, treatment diameter which is greater than the positioning diameter when the device is in the treatment state. The constricted regions are engaged with the catheter and concentric with the unconstricted regions.Type: GrantFiled: March 6, 2000Date of Patent: July 31, 2001Assignee: Schneider (USA) Inc.Inventors: Claude O. Clerc, Jon S. Stinson
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Patent number: 6265016Abstract: A process for the preparation of slippery, hydrophilic polyurethane hydrogel coating compositions, and materials composed of a polymeric plastic or rubber substrate or a metal substrate with a coating of a slippery, hydrophilic polyurethane hydrogel thereon, such that the coating composition tenaciously adheres to the substrate, are disclosed. The coating compositions and coated materials are non-toxic and biocompatible, and are ideally suited for use on medical devices, particularly, catheters, catheter balloons and stents. The coating compositions, coated materials and coated devices demonstrate low coefficients of friction in contact with body fluids, especially blood, as well as a high degree of wear permanence over prolonged use of the device. The hydrogel coating compositions are capable of being dried to facilitate storage of the devices to which they have been applied, and can be instantly reactivated for later use by exposure to water.Type: GrantFiled: March 21, 2000Date of Patent: July 24, 2001Assignee: Schneider (USA) Inc.Inventors: Fritz Hostettler, David Rhum, Michael R. Forman, Michael N. Helmus, Ni Ding
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Patent number: 6251135Abstract: A temporary and retrievable radiopaque marker and discrete radiopaque marker for use on an implantable endoprosthesis. The elongate marker has a proximal end, a distal end, and a thickness. At least a portion of the marker is radiopaque and the marker is removably-attached to the implantable endoprosthesis.Type: GrantFiled: March 8, 1999Date of Patent: June 26, 2001Assignee: Schneider (USA) IncInventors: Jonathan S. Stinson, Claude O. Clerc
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Patent number: 6245103Abstract: A self-expanding stent formed from helically wound and braided filaments of bioabsorbable polymers such as PLA, PLLA, PDLA, and PGA.Type: GrantFiled: August 1, 1997Date of Patent: June 12, 2001Assignee: Schneider (USA) IncInventor: Jonathan S. Stinson
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Patent number: 6240978Abstract: A prosthetic stent with a tubular wall having local inwardly or outwardly formed elevations. Stents having such elevations have a higher mechanical stability if bend according to the curvature of the body vessels to be supported or repaired. Also a method for manufacturing a stent with such elevations is described.Type: GrantFiled: November 2, 1999Date of Patent: June 5, 2001Assignee: Schneider (USA) Inc.Inventor: Marc Gianotti
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Patent number: 6217609Abstract: The invention relates to a braided implantable endoprosthesis such as a stent or stent-graft with selectively terminated elongated member ends to aid orientation and control. A saw-tooth or crown pattern is formed on an end or on an edge of an opening in the generally tubular body. The pattern is defined by a series of terminus on the elongated members at a predetermined distance from respective control points. The termini cooperate with the control points and provide layers when constrained. The invention also relates to methods of making a braided implantable endoprosthesis with patterned terminated ends.Type: GrantFiled: June 30, 1998Date of Patent: April 17, 2001Assignee: Schneider (USA) IncInventor: Patrick Alan Haverkost
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Patent number: 6200290Abstract: Disclosed is a dilatation balloon having a single layer containing polyesteretheramide copolymer. The dilatation balloon may also contain polyamide and/or additional polymers, and may contain substantially no polyetheramide having substantially no ester linkages.Type: GrantFiled: March 12, 1998Date of Patent: March 13, 2001Assignee: Schneider (USA) Inc.Inventor: Robert E. Burgmeier
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Patent number: 6193748Abstract: The present invention is an occlusion device adapted for implantation into a fluid flow-supporting body lumen. The occlusion device comprises a flexible support structure and a flexible fluid flow-occluding membrane that is positioned concentric with the flexible support structure. The support structure is formed from a plurality of interwoven filaments that form an axially flexible and radially compressible structure that, in its expanded state, engages the lumen. The membrane generally includes a constricted region and constriction means, such as a mechanical seal, for closing the membrane at one end. The membrane is formed from a plurality of filaments, and in one embodiment, the membrane filaments are tightly interbraided with the structure filaments to form the occlusion device. Alternatively, the membrane is separately fabricated of interwoven filaments, and is positioned either within the support structure or without the structure so as to surround the support structure.Type: GrantFiled: June 11, 1999Date of Patent: February 27, 2001Assignee: Schneider (USA) INCInventors: Paul J. Thompson, Claude Clerc
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Patent number: 6193685Abstract: An improved perfusion system for a dilatation catheter includes inlet openings disposed at an acute angle with the normal direction of vascular flow.Type: GrantFiled: November 26, 1996Date of Patent: February 27, 2001Assignee: Schneider (USA) Inc.Inventor: Richard L. Goodin
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Patent number: 6187014Abstract: A stent delivery device having a pair of balloons at a proximal end of a catheter and having separate lumens for selectively inflating the respective balloons. The outer balloon is relatively compliant and the inner balloon is relatively non-compliant. A central lumen is provided for a guide wire. A stent is carried by the delivery device within an axially retractable sheath at the distal end of the catheter and is deployed by retraction of the sheath and inflation of the compliant balloon, and the stent is subsequently expanded by inflation of the non-compliant balloon.Type: GrantFiled: July 26, 1999Date of Patent: February 13, 2001Assignee: Schneider (USA) IncInventors: Richard L. Goodin, Robert E. Burgmeier
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Patent number: 6174330Abstract: A temporary bioabsorbable-radiopaque marker for use on an implantable endoprosthesis. The bioabsorbable-radiopaque marker is adapted to be disposed on or adjacent an implantable endoprosthesis in a body lumen for a predetermined amount of time until the bioabsorbable and radiopaque materials are absorbed or dispersed in the body. The bioabsorbable material may include polylactide and the radiopaque material may include bismuth trioxide and barium sulfate. The weight percent of the radiopaque material in the bioabsorbable material may range from about 1% to about 80%. The radiopaque material may have a linear attenuation coefficient of from about 10 cm−1 at 50 KeV to about 120 cm−1 at 50 KeV.Type: GrantFiled: August 1, 1997Date of Patent: January 16, 2001Assignee: Schneider (USA) IncInventor: Jonathan S. Stinson
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Patent number: 6171297Abstract: The invention relates to a radiopaque catheter tip and catheter assembly having radiopaque elements associated with a catheter. The preferred materials for the radiopaque elements are made of a 90% platinum and 10% nickel composite structure or a 90% platinum and 10% iridium composite structure.Type: GrantFiled: June 30, 1998Date of Patent: January 9, 2001Assignee: Schneider (USA) IncInventors: Allen R. Pedersen, Dennis A. Peiffer
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Patent number: 6165211Abstract: The expandable stent-graft generally defines a cylindrical lumen made from a stent having a discontinuous wall that is at least substantially covered with an expanded polytetrafluoroethylene material. The expanded polytetrafluoroethylene covering may be a biaxially oriented, expanded polytetrafluoroethylene material having nodules and longitudinal and circumferential fibrils or a uniaxially oriented, expanded polytetrafluoroethylene material. The expandable stent-graft expands and compresses in association with the stent structure as it is contracted and expanded.Type: GrantFiled: December 11, 1997Date of Patent: December 26, 2000Assignee: Schneider (USA) Inc.Inventor: Paul J. Thompson
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Patent number: 6165166Abstract: The present invention provides a length of trilayer, extruded, medical tubing comprising an outer layer, a core layer, and an intermediate tie layer. The outer layer comprises a polymer that is directly bondable, while the core layer comprises a lubricious polymer. The core layer thus defines a lumen that exhibits the desired characteristics, i.e., low friction for the advancement of a guidewire or catheter through the lumen without comprising the strength and stiffness that is desirable in tubing that is to be used in medical devices. Additionally, the tubing is easily coextruded and yet, is not subject to delamination, thus providing the added advantage of providing a reduction in the overall cost of manufacture.Type: GrantFiled: January 28, 1998Date of Patent: December 26, 2000Assignee: Schneider (USA) Inc.Inventors: Christine M. Samuelson, Sarah J. Krieger
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Patent number: 6156064Abstract: A braided self-expandable stent-graft-membrane made of elongated members forming a generally tubular body. A membrane layer and graft layer are disposed on a endoprosthesis such as a stent. The membrane layer is substantially impermeable to fluids. The outermost layer is biocompatible with the body tissue. The innermost layer is biocompatible with the fluid in the passage. An embodiment includes a graft layer disposed on the inside of a stent and a membrane layer disposed on the outside of the stent. The innermost layer is biocompatible with the fluid in the passage. The stent-graft-membrane is used at a treatment site in a body vessel or organ where it is desirous to exclude a first fluid located outside the endoprosthesis from reaching a second fluid located in the lumen. The membrane may be made of silicone or polycarbonate urethane. The graft may be braided, woven, spun or spray-cast PET, PCU, or PU fibers. The layers may include ePTFE or PTFE.Type: GrantFiled: August 14, 1998Date of Patent: December 5, 2000Assignee: Schneider (USA) IncInventor: Paul F. Chouinard
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Patent number: 6149996Abstract: The invention relates to a molded tip on tubing and a method of making the same. The molded tip is molded on the tubing in a mold cavity and is for use in a stent delivery device, guide catheter, or angiographic catheter.Type: GrantFiled: January 15, 1998Date of Patent: November 21, 2000Assignee: Schneider (USA) Inc.Inventors: Jeffrey A Helgerson, Gary R. Fiedler
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Patent number: 6132824Abstract: A method of producing laminated inflatable, substantially inextensible expander members having composite properties enhancing their use on intravascular catheters, such as angioplasty catheters is described. Diverse polymeric compounds of differing properties are coextruded to create a multilayer parison. The parison is subsequently drawn and expanded in a blow molding operation to yield an expander member exhibiting enhanced properties including lubricity, burst-strength, limited radial expansion, bondability, and rupture characteristics.Type: GrantFiled: August 6, 1997Date of Patent: October 17, 2000Assignee: Schneider (USA) Inc.Inventor: Robert N. Hamlin