Patents by Inventor Alan R. Leewood

Alan R. Leewood 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).

  • Patent number: 7887576
    Abstract: An endoluminal device comprises a stent and a tubular graft supported by the stent. The graft has a proximal and a distal opening and comprises a synthetic material and a bioremodelable material. The bioremodelable material is disposed on an exterior surface in at least one band adjacent at least one of the proximal and distal openings.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: February 15, 2011
    Assignees: Cook Incorporated, Cook Biotech Incorporated, MED Institute, Inc.
    Inventors: Clinton D. Bahler, Michael P. DeBruyne, Neal E. Fearnot, Alan R. Leewood, Jason A. Mead, Thomas A. Osborne, Jichao Sun, Lal Ninan
  • Publication number: 20100280590
    Abstract: The technology described herein relates to a stent graft and a method of making the stent wherein the stent comprises interconnected struts and is connected to the graft material by applying at least one band of polymer so as to cover at least a portion of at least some of the struts. A stent supported area is created by the stent's attachment to the graft material and the at least one band of polymer is applied so as to leave the majority of the stent supported area uncovered by the at least one band of polymer.
    Type: Application
    Filed: June 13, 2008
    Publication date: November 4, 2010
    Inventors: Jichao Sun, Natalie M. Abell, Neal E. Fearnot, Alan R. Leewood, James D. Purdy
  • Patent number: 7815687
    Abstract: The present invention relates to methods of treating tissue of the human body, specially, methods of promoting cell proliferation and ingrowth around implantable medical devices. The methods include inserting an apparatus comprising asperities adapted to injure native tissue at a desired anchoring location, injuring the native tissue at the desired anchoring location with the apparatus to initiate an injury response in the native tissue to thereby promote cell proliferation and ingrowth; and implanting the medical device at the treatment location.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: October 19, 2010
    Assignee: Med Institute, Inc.
    Inventors: Clinton D. Bahler, Alan R. Leewood, Jichao Sun
  • Publication number: 20100256736
    Abstract: A balloon expandable covered stent consists of a plurality of primary stent units, each having an undulating shape defined by a series of primary strut members converging to form peaks and valleys. The primary stent units are assembled into a single cylindrical structure of the stent by connecting corresponding peaks with secondary strut members. Generally, surfaces of the stent may then coated with a polymeric, hyper-elastic material, preferably Thoralon®, by pre-expanding the stent prior to coating.
    Type: Application
    Filed: June 17, 2010
    Publication date: October 7, 2010
    Inventors: JAMES D. PURDY, Richard A. Swift, Blayne A. Roeder, Alan R. Leewood, Jichao Sun
  • Patent number: 7753948
    Abstract: A beam is provided for intraluminal devices. The beam is defined by a first side surface and a second side surface. The first side surface is tapered at a different rate than the second side surface. One advantage of the beam is that strain which is normally concentrated in adjacent, interconnected bends is redirected onto the length of the beam. This may increase the fatigue life of intraluminal devices or may be used to fashion new structures with improved performance.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: July 13, 2010
    Assignee: Med Institute Inc.
    Inventors: Blayne A. Roeder, Alan R. Leewood
  • Publication number: 20100161026
    Abstract: A stent for use in a medical procedure having opposing sets of curved apices, where the curved section of one set of apices has a radius of curvature that is greater than the curved section of the other set of apices. One or more such stents may be attached to a graft material for use in endovascular treatment of, for example, aneurysm, thoracic dissection, or other body vessel condition.
    Type: Application
    Filed: November 19, 2009
    Publication date: June 24, 2010
    Inventors: David Brocker, William K. Dierking, Alan R. Leewood, Timothy A.M. Chuter, Blayne A. Roeder, Steven J. Charlesbois, Richard A. Swift, Sharath Gopalakrishnamurthy, Matthew Huser, Jarin Kratzberg, Erik E. Rasmussen, Bent Oehlenschlaeger, Kim Møgelvang Jensen
  • Patent number: 7655033
    Abstract: A variable curvature stent limb is disclosed herein. A stent derived from a plurality of these variable curvature stent limbs may be highly compressible, such that it is compatible with a low-profile delivery device. This stent may be useful over a wider range of body vessel diameters and may possess a greater fatigue life, since this stent may provide a more controlled constant radial force.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: February 2, 2010
    Assignee: Med Institute, Inc.
    Inventors: Neal E. Fearnot, Blayne A. Roeder, Alan R. Leewood, Jichao Sun
  • Publication number: 20090248144
    Abstract: An endoluminal device comprises a stent and a tubular graft supported by the stent. The graft has a proximal and a distal opening and comprises a synthetic material and a bioremodelable material. The bioremodelable material is disposed on an exterior surface in at least one band adjacent at least one of the proximal and distal openings.
    Type: Application
    Filed: May 19, 2009
    Publication date: October 1, 2009
    Applicants: Cook Biotech Incorporated, Cook Incorporated, MED Institute, Inc.
    Inventors: Clinton D. Bahler, Michael P. DeBruyne, Neal E. Fearnot, Alan R. Leewood, Jason A. Mead, Thomas A. Osborne, Jichao Sun, Lal Ninan
  • Publication number: 20090248134
    Abstract: A stent for use in a stent graft comprising a strut region comprising at least two struts, the struts having at least one radius of curvature; a bend connecting the at least two struts and forming an eyelet region, where the strut region and the eyelet region are electropolished and the eyelet region is locally polished; and an eyelet positioned in the eyelet region, having at least one radius of curvature greater than zero is provided. A method of manufacturing the same also is provided.
    Type: Application
    Filed: December 19, 2008
    Publication date: October 1, 2009
    Applicant: MED INSTITUTE, INC.
    Inventors: William K. Dierking, Alan R. Leewood, Blayne A. Roeder
  • Publication number: 20090177265
    Abstract: The disclosure relates to an intraluminal medical device. The medical device comprises a main graft, a first extension graft, and a second extension graft. The main graft comprises a proximal end, a distal end, and a body extending between the proximal end and distal end. The distal end of the main graft comprises a first branch and a second branch, the branches extending distally from the body. The first and second extension grafts comprise at least one stent and have a body reinforcing portion and a branch reinforcing portion. The body reinforcing portions have a larger expanded dimension than the expanded dimension of the respective branch reinforcing portion. The body reinforcing portions, together, have an expanded dimension that is generally equal to the expanded dimension of the outer graft body.
    Type: Application
    Filed: December 17, 2008
    Publication date: July 9, 2009
    Applicant: Med Institute
    Inventors: William Kurt Dierking, Blayne A. Roeder, Alan R. Leewood, Steven J. Charlebois
  • Publication number: 20090171438
    Abstract: The present examples provide a stent for use in a medical procedure that comprises at least one apex having first and second generally straight portions and a curved portion disposed between the first and second straight portions. The curved portion may comprise at least one region having a cross-sectional area that is less than a cross-sectional area of the first and second straight portions, which may facilitate compression of the stent and insertion of the stent into smaller vessels. The stent may be used alone, or in conjunction with a stent-graft, and may comprise one or more barbs configured to engage an inner wall of a vessel or duct.
    Type: Application
    Filed: December 18, 2008
    Publication date: July 2, 2009
    Applicant: Cook Incorporated
    Inventors: Timothy A.M. Chuter, William K. Dierking, Alan R. Leewood, Blayne A. Roeder
  • Publication number: 20090164001
    Abstract: A stent graft adapted to telescopically receive a secondary stent graft having an evertible, elastic socket communicating with an opening in the stent graft. The socket comprises an elastic wall that forms a lumen with a stent at least partially encased within the wall. The socket may be adapted for use with stent grafts for implantantation in an aneurysm.
    Type: Application
    Filed: September 18, 2008
    Publication date: June 25, 2009
    Inventors: DAVID P. BIGGS, JICHAO SUN, ALAN R. LEEWOOD
  • Patent number: 7550004
    Abstract: An endoluminal device comprises a stent and a tubular graft supported by the stent. The graft has a proximal and a distal opening and comprises a synthetic material and a bioremodelable material. The bioremodelable material is disposed on an exterior surface in at least one band adjacent at least one of the proximal and distal openings.
    Type: Grant
    Filed: March 30, 2005
    Date of Patent: June 23, 2009
    Assignees: Cook Biotech Incorporated, Cook Incorporated, MED Institute, Inc.
    Inventors: Clinton D. Bahler, Michael P. DeBruyne, Neal E. Fearnot, Alan R. Leewood, Jason A. Mead, Thomas A. Osborne, Jichao Sun, Lal Ninan
  • Publication number: 20090157167
    Abstract: The present invention relates to methods of treating tissue of the human body, specially, methods of promoting cell proliferation and ingrowth around implantable medical devices. The methods include inserting an apparatus comprising asperities adapted to injure native tissue at a desired anchoring location, injuring the native tissue at the desired anchoring location with the apparatus to initiate an injury response in the native tissue to thereby promote cell proliferation and ingrowth; and implanting the medical device at the treatment location.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 18, 2009
    Inventors: Clinton D. Bahler, Alan R. Leewood, Jichao Sun
  • Publication number: 20090105797
    Abstract: A stent includes a radially expandable tubular structure having a first end, a second end, and a primary strut arrangement extending over substantially an entire length thereof. The primary strut arrangement includes a plurality of rows of struts. The struts are interconnected within each row in a sinusoidal arrangement about a circumference of the tubular structure. Crests and troughs in the sinusoidal arrangement include connection points of the struts. A plurality of longitudinal struts connect neighboring rows of struts at the connection points. In each row, four circumferentially adjacent struts are disposed between every two longitudinal struts joined to the row. One of the two longitudinal struts extends in a direction of the first end to a first neighboring row, and the other of the two longitudinal struts extends in a direction of the second end to a second neighboring row.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 23, 2009
    Applicant: MED Institute, Inc.
    Inventors: Blayne A. ROEDER, Alan R. Leewood, David D. Grewe
  • Publication number: 20090030502
    Abstract: A stent graft adapted to telescopically receive a secondary stent graft characterized in that the stent graft comprises at least one socket communicating with at least one opening in the stent graft. The at least one socket comprises an elastic wall that forms a lumen with a stent at least partially encased within the wall. The socket can be adapted for use with stent grafts for implantantation in an aneurysm.
    Type: Application
    Filed: June 11, 2008
    Publication date: January 29, 2009
    Inventors: Jichao Sun, Alan R. Leewood
  • Publication number: 20090024137
    Abstract: A device for delivering and deploying a prosthesis is described and comprises an elongate sheath having a sheath lumen and a delivery catheter slidably disposed within the sheath lumen. A deployment assist mechanism may be coupled to the delivery catheter and the sheath and configured to apply a retraction force to the delivery catheter and the sheath. Additional devices, systems, and methods of delivering and deploying a prosthesis are described.
    Type: Application
    Filed: July 15, 2008
    Publication date: January 22, 2009
    Applicants: Cook Incorporated, MED Institute, Inc.
    Inventors: Timothy A. Chuter, David D. Grewe, Blayne A. Roeder, Alan R. Leewood
  • Publication number: 20080319530
    Abstract: An endovascular prosthesis that includes a stent and a woven graft material. The stent is connected to the graft material by direct attachment of the stent to the graft material at thermoplastically fused regions of the graft material.
    Type: Application
    Filed: June 20, 2008
    Publication date: December 25, 2008
    Inventors: Alan R. Leewood, Blayne A. Roeder, Neal E. Fearnot, Jicaho Sun
  • Publication number: 20080195193
    Abstract: A balloon expandable covered stent consists of a plurality of primary stent units, each having an undulating shape defined by a series of primary strut members converging to form peaks and valleys. The primary stent units are assembled into a single cylindrical structure of the stent by connecting corresponding peaks with secondary strut members. Generally, surfaces of the stent may then coated with a polymeric, hyper-elastic material, preferably Thoralon®, by pre-expanding the stent prior to coating.
    Type: Application
    Filed: January 30, 2008
    Publication date: August 14, 2008
    Applicant: Cook Incorporated
    Inventors: James D. Purdy, Richard A. Swift, Blayne A. Roeder, Alan R. Leewood, Jichao Sun
  • Publication number: 20080154351
    Abstract: Various stent structures are provided with improved axial and torsional flexibility. One type of stent structure includes multiple segmented stent structures connected to each other by biodegradable interconnectors. A delivery system adapted to delivery the multiple segmented stents is also described. Another type of stent structure includes biodegradable connectors that are incorporated into a framework of non-biodegradable interconnecting members that form the support structure of the stent. The biodegradable connectors in both stent structures degrade or are absorbed after the stent is deployed. Stabilizing elements may be provided to the stent structures to supplement the stiffness of the stent with stability during loading and deployment.
    Type: Application
    Filed: September 6, 2007
    Publication date: June 26, 2008
    Inventors: Alan R. Leewood, David D. Grewe, Mark J. Hiatt, Anthony O. Ragheb, William D. Voorhees, Blayne A. Roeder, James D. Purdy