Patents by Inventor Pallassana Narayanan

Pallassana Narayanan 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).

  • Publication number: 20070135905
    Abstract: A biocompatible material may be configured into any number of implantable medical devices including intraluminal stents. Polymeric materials may be utilized to fabricate any of these devices, including stents. The stents may be balloon expandable or self-expanding. By preferential mechanical deformation of the polymer, the polymer chains may be oriented to achieve certain desirable performance characteristics.
    Type: Application
    Filed: December 13, 2005
    Publication date: June 14, 2007
    Inventors: Robert Burgermeister, Vipul Dave, Pallassana Narayanan, David Overaker
  • Publication number: 20070134296
    Abstract: A biocompatible material may be configured into any number of implantable medical devices including intraluminal stents. Polymeric materials may be utilized to fabricate any of these devices, including stents. The stents may be balloon expandable or self-expanding. By preferential mechanical deformation of the polymer, the polymer chains may be oriented to achieve certain desirable performance characteristics.
    Type: Application
    Filed: May 25, 2006
    Publication date: June 14, 2007
    Inventors: Robert Burgermeister, Joseph Contiliano, Vipul Dave, Yufu Li, Pallassana Narayanan, David Overaker, Qiang Zhang
  • Publication number: 20070134289
    Abstract: A biocompatible material may be configured into any number of implantable medical devices including intraluminal stents. Polymeric materials may be utilized to fabricate any of these devices, including stents. The stents may be balloon expandable or self-expanding. By preferential mechanical deformation of the polymer, the polymer chains may be oriented to achieve certain desirable performance characteristics.
    Type: Application
    Filed: May 25, 2006
    Publication date: June 14, 2007
    Inventors: Robert Burgermeister, Joseph Contiliano, Vipul Dave, Yufu Li, Pallassana Narayanan, David Overaker, Qiang Zhang
  • Publication number: 20070122550
    Abstract: The present invention provides an amphiphilic coating material for applying on at least a portion of one surface of an article. The amphiphilic coating material comprises a polymer having a hydrophobic backbone derived from a vinyl moiety and hydrophilic pendent chains derived from a polyethylene oxide moiety. The present invention also provides an article having an amphiphilic coating thereon. The hydrophobic backbone derived from a vinyl moiety adheres to at least one surface of an article. The hydrophilic pendent chains derived from a polyethylene oxide moiety extend from the hydrophobic backbone and form a three-dimensional network.
    Type: Application
    Filed: November 30, 2005
    Publication date: May 31, 2007
    Inventors: Pallassana Narayanan, Jonathon Zhao
  • Publication number: 20070122443
    Abstract: The present invention provides an amphiphilic coating material for applying on at least a portion of one surface of an article. The amphiphilic coating material comprises a copolymer containing one or more alkyl methacrylate or alkyl acrylate co-monomer units; one or more vinyl acetate co-monomer units; and up to 40% mole of polyethylene oxide substituted methacrylate co-monomer units. Optionally, one or more biologically active molecules may be covalently bonded to the polyethylene oxide substituted methacrylate co-monomer units. The present invention also provides an article having the inventive amphiphilic coating thereon.
    Type: Application
    Filed: November 29, 2005
    Publication date: May 31, 2007
    Inventors: Pallassana Narayanan, Jonathon Zhao
  • Publication number: 20070083258
    Abstract: Medical devices, and in particular implantable medical devices, may be coated to minimize or substantially eliminate a biological organism's reaction to the introduction of the medical device to the organism. The medical devices may be coated with any number of biocompatible materials. Therapeutic drugs, agents or compounds may be mixed with the biocompatible materials and affixed to at least a portion of the medical device. These therapeutic drugs, agents or compounds may also further reduce a biological organism's reaction to the introduction of the medical device to the organism. In addition, these therapeutic drugs, agents and/or compounds may be utilized to promote healing, including the formation of blood clots. The drugs, agents, and/or compounds may also be utilized to treat specific diseases, including vulnerable plaque. Therapeutic agents may also be delivered to the region of a disease site.
    Type: Application
    Filed: October 6, 2005
    Publication date: April 12, 2007
    Inventors: Robert Falotico, Pallassana Narayanan
  • Publication number: 20060222756
    Abstract: Medical devices, and in particular implantable medical devices, may be coated to minimize or substantially eliminate a biological organism's reaction to the introduction of the medical device to the organism. The medical devices may be coated with any number of biocompatible materials. Therapeutic drugs, agents or compounds may be mixed with the biocompatible materials and affixed to at least a portion of the medical device. These therapeutic drugs, agents or compounds may also further reduce a biological organism's reaction to the introduction of the medical device to the organism. Various materials and coating methodologies may be utilized to maintain the drugs, agents or compounds on the medical device until delivered and positioned.
    Type: Application
    Filed: May 19, 2006
    Publication date: October 5, 2006
    Applicant: Cordis Corporation
    Inventors: Luis Davila, David Lentz, Gerard Llanos, Jorge Mendez, Pallassana Narayanan, Alan Pelton, Mark Roller, Karl Scheidt, Angelo Scopelianos, William Shaw, James Silver, John Spaltro, Christine Trepanier, David Wilson
  • Publication number: 20050249775
    Abstract: Medical devices, and in particular implantable medical devices, may be coated to minimize or substantially eliminate a biological organism's reaction to the introduction of the medical device to the organism. The medical devices may be coated with any number of biocompatible materials. Therapeutic drugs, agents or compounds may be mixed with the biocompatible materials and affixed to at least a portion of the medical device. These therapeutic drugs, agents or compounds may also further reduce a biological organism's reaction to the introduction of the medical device to the organism. In addition, these therapeutic drugs, agents and/or compounds may be utilized to promote healing, including the formation of blood clots. The drugs, agents, and/or compounds may also be utilized to treat specific diseases, including vulnerable plaque. Therapeutic agents may also be delivered to the region of a disease site.
    Type: Application
    Filed: May 18, 2005
    Publication date: November 10, 2005
    Inventors: Robert Falotico, Pallassana Narayanan
  • Publication number: 20050037133
    Abstract: Medical devices, and in particular implantable medical devices such as stents and stent delivery systems including catheters, may be coated to minimize or substantially eliminate a biological organism's reaction to the introduction of the medical device to the organism or to treat a particular condition. A dip coating process is utilized to minimize waste and to customize coating thickness and drug loading directly at the clinical site just prior to therapeutic use on a patient. An aqueous latex polymeric emulsion is utilized to coat any medical device to a desired thickness by allowing for successive dipping and drying cycles at the clinical site. In addition, aqueous latex polymeric emulsions pose less of a chance of the bridging phenomenon associated with organic solvent based polymers.
    Type: Application
    Filed: August 11, 2004
    Publication date: February 17, 2005
    Inventors: Harry Halleriet, Pallassana Narayanan
  • Publication number: 20050038504
    Abstract: A kit for customizing medical treatment for an individual patient directly at a clinical site includes one or more of the following components: an aqueous latex polymeric emulsion; at least one drug, agent and/or compound, in therapeutic dosages, for the treatment of a predetermined condition; a stent; and a catheter.
    Type: Application
    Filed: August 11, 2004
    Publication date: February 17, 2005
    Inventors: Harry Halleriet, Pallassana Narayanan
  • Publication number: 20050033417
    Abstract: Medical devices, and in particular implantable medical devices, may be coated to minimize or substantially eliminate a biological organism's reaction to the introduction of the medical device to the organism. The medical devices may be coated with any number of biocompatible materials. Therapeutic drugs, agents or compounds may be mixed with the biocompatible materials and affixed to at least a portion of the medical device. These therapeutic drugs, agents or compounds may also further reduce a biological organism's reaction to the introduction of the medical device to the organism. In addition, these therapeutic drugs, agents and/or compounds may be utilized to promote healing, including the formation of blood clots. Also, the devices may be modified to promote endothelialization. Various materials and coating methodologies may be utilized to maintain the drugs, agents or compounds on the medical device until delivered and positioned.
    Type: Application
    Filed: July 1, 2004
    Publication date: February 10, 2005
    Inventors: John Borges, Maritza Carballo, Pallassana Narayanan, William Shaw, Christopher Widenhouse
  • Publication number: 20050004663
    Abstract: Medical devices, and in particular implantable medical devices, may be coated to minimize or substantially eliminate a biological organism's reaction to the introduction of the medical device to the organism. The medical devices may be coated with any number of biocompatible materials. Therapeutic drugs, agents or compounds may be mixed with the biocompatible materials and affixed to at least a portion of the medical device. These therapeutic drugs, agents or compounds may also further reduce a biological organism's reaction to the introduction of the medical device to the organism. In addition, these therapeutic drugs, agents and/or compounds may be utilized to promote healing, including the formation of blood clots. The drugs, agents, and/or compounds may also be utilized to treat specific diseases, including vulnerable plaque. Therapeutic agents may also be delivered to the region of a disease site.
    Type: Application
    Filed: June 21, 2004
    Publication date: January 6, 2005
    Inventors: Gerard Llanos, Pallassana Narayanan, George Papandreou
  • Publication number: 20040197372
    Abstract: The present invention includes biocompatible coatings and films for use on implantable medical devices and medical devices containing such coatings and films applied to a surface thereof, which coatings/films are present on the device in an amount effective to provide an inert surface to be in contact with body tissue of a mammal upon implantation of the device in the mammal, and contain a film-forming polyfluoro copolymer containing the polymerized residue of a moiety selected from the group consisting of vinylidenefluoride and tetrafluoroethylene copolymerized with a second moiety other than the first moiety, wherein the relative amounts of the polymerized residue of the first and second moieties are effective to provide the coating and films with properties effective for use in coating implantable med devices.
    Type: Application
    Filed: April 20, 2004
    Publication date: October 7, 2004
    Inventors: Gerard H. Llanos, Pallassana Narayanan, Mark B. Roller, Angelo Scopelianos
  • Patent number: 6746773
    Abstract: The present invention includes biocompatible coatings and films for use on implantable medical devices and medical devices containing such coatings and films applied to a surface thereof, which coatings/films are present on the device in an amount effective to provide an inert surface to be in contact with body tissue of a mammal upon implantation of the device in the mammal, and contain a film-forming polyfluoro copolymer containing the polymerized residue of a moiety selected from the group consisting of vinylidenefluoride and tetrafluoroethylene copolymerized with a second moiety other than the first moiety, wherein the relative amounts of the polymerized residue of the first and second moieties are effective to provide the coating and films with properties effective for use in coating implantable med devices.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: June 8, 2004
    Assignee: Ethicon, Inc.
    Inventors: Gerard H. Llanos, Pallassana Narayanan, Mark B. Roller, Angelo Scopelianos
  • Patent number: 6723373
    Abstract: A stent is positioned on an undersized mandrel and the stent is coated with an excess of a polymer and drug solution. The stent is rotated to spin off the excess of the coating. The stent is then moved into a new, clean position on the mandrel. The process is repeated a few times, after which time the coating is already dry and non-sticky. This process forms a conforming coating. Various important polymer solution parameters include viscosity, solvent evaporation rate and several others. The actual type of coating polymer is not as important as how the surface of the stent is treated, according to the steps described herein.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: April 20, 2004
    Assignee: Cordis Corporation
    Inventors: Pallassana Narayanan, Gerard H. Llanos, David Cook, Jacob Leidner
  • Publication number: 20020094440
    Abstract: The present invention includes biocompatible coatings and films for use on implantable medical devices and medical devices containing such coatings and films applied to a surface thereof, which coatings/films are present on the device in an amount effective to provide an inert surface to be in contact with body tissue of a mammal upon implantation of the device in the mammal, and contain a film-forming polyfluoro copolymer containing the polymerized residue of a moiety selected from the group consisting of vinylidenefluoride and tetrafluoroethylene copolymerized with a second moiety other than the first moiety, wherein the relative amounts of the polymerized residue of the first and second moieties are effective to provide the coating and films with properties effective for use in coating implantable med devices.
    Type: Application
    Filed: September 25, 2001
    Publication date: July 18, 2002
    Inventors: Gerard H. Llanos, Pallassana Narayanan, Mark B. Roller, Angelo Scopelianos