Patents by Inventor Verivada Chandrasekaran
Verivada Chandrasekaran 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: 9630275Abstract: Disclosed are methods and structures for joining metallic members. A welding material can be used between two metallic members that comprise different metals. The different metals can normally form brittle intermetallic compounds when welded to one another, and the welding material can inhibit the formation of the brittle intermetallic compounds.Type: GrantFiled: December 10, 2009Date of Patent: April 25, 2017Assignee: BOSTON SCIENTIFIC LIMITEDInventors: Hancun Chen, Mike Sterud, Syed Naveed, Verivada Chandrasekaran, Vitto Monni
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Patent number: 8118857Abstract: A medical article that includes (a) an electronically conductive substrate having a specific conductivity of at least 1 ?S/cm and (b) a galvanic couple that includes a first member and a second member arranged in sufficient proximity to each other to generate a localized electric field under physiological conditions. The first and second members are selected such that the galvanic couple exhibits an average plateau current density of at least 25 microamps/cm2 when short circuited in a zero resistance ammeter test at room temperature using a saline electrolyte.Type: GrantFiled: November 29, 2007Date of Patent: February 21, 2012Assignee: Boston Scientific CorporationInventors: Daniel VanCamp, Rajesh Radhakrishnan, Eric Nielson, Verivada Chandrasekaran
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Publication number: 20110257730Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: ApplicationFiled: May 23, 2011Publication date: October 20, 2011Applicant: Boston Scientific Scimed, Inc.Inventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Patent number: 7967854Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: GrantFiled: February 11, 2010Date of Patent: June 28, 2011Assignee: Boston Scientific Scimed, Inc.Inventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Publication number: 20100176095Abstract: Disclosed are methods and structures for joining metallic members. A welding material can be used between two metallic members that comprise different metals. The different metals can normally form brittle intermetallic compounds when welded to one another, and the welding material can inhibit the formation of the brittle intermetallic compounds.Type: ApplicationFiled: December 10, 2009Publication date: July 15, 2010Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: HANCUN CHEN, MICHAEL STERUD, SYED NAVEED, VERIVADA CHANDRASEKARAN, VITTO MONNI
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Publication number: 20100174360Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: ApplicationFiled: February 11, 2010Publication date: July 8, 2010Applicant: BOSTON SCIENTIFIC SCIMED, INC.Inventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Patent number: 7682649Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: GrantFiled: April 20, 2007Date of Patent: March 23, 2010Assignee: Boston Scientific Scimed, Inc.Inventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Publication number: 20090143856Abstract: A medical article that includes (a) an electronically conductive substrate having a specific conductivity of at least 1 ?S/cm and (b) a galvanic couple that includes a first member and a second member arranged in sufficient proximity to each other to generate a localized electric field under physiological conditions. The first and second members are selected such that the galvanic couple exhibits an average plateau current density of at least 25 microamps/cm2 when short circuited in a zero resistance ammeter test at room temperature using a saline electrolyte.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Applicant: BOSTON SCIENTIFIC CORPORATIONInventors: Daniel VanCamp, Rajesh Radhakrishnan, Eric Nielson, Verivada Chandrasekaran
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Patent number: 7297157Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: GrantFiled: July 29, 2003Date of Patent: November 20, 2007Assignee: Boston Scientific Scimed, Inc.Inventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Publication number: 20070190231Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: ApplicationFiled: April 20, 2007Publication date: August 16, 2007Inventors: Verivada Chandrasekaran, Karl Schmidt, Christopher Molina
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Publication number: 20060130332Abstract: Distal protection filter frame and method for using and manufacturing the same. A distal protection filter frame may include one or more struts, a mouth, and a filter coupled to the mouth.Type: ApplicationFiled: March 6, 2006Publication date: June 22, 2006Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Thomas Broome, James Anderson, Robert Cassell, Verivada Chandrasekaran, John Daniel, Bradley Staker, Jeffrey Vogel
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Patent number: 6960370Abstract: Medical devices that include oxidizable portions can be plated after a two step activation process that includes successive applications of two aqueous solutions of ammonium bifluoride. Once plated, such materials can be soldered using conventional solders and fluxes. Medical devices can be assembled by soldering together plated materials. Oxidizable materials can be plated with radiopaque materials to yield medical devices that are more visible to fluoroscopy.Type: GrantFiled: March 27, 2003Date of Patent: November 1, 2005Assignee: SciMed Life Systems, Inc.Inventors: Vittorino Monni, Verivada Chandrasekaran, Outhay Voraphet
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Publication number: 20040188261Abstract: Medical devices that include oxidizable portions can be plated after a two step activation process that includes successive applications of two aqueous solutions of ammonium bifluoride. Once plated, such materials can be soldered using conventional solders and fluxes. Medical devices can be assembled by soldering together plated materials. Oxidizable materials can be plated with radiopaque materials to yield medical devices that are more visible to fluoroscopy.Type: ApplicationFiled: March 27, 2003Publication date: September 30, 2004Applicant: SCIMED LIFE SYSTEMS, INC.Inventors: Vittorino Monni, Verivada Chandrasekaran, Outhay Voraphet
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Publication number: 20040068315Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: ApplicationFiled: July 29, 2003Publication date: April 8, 2004Applicant: SciMed Life Systems, Inc., a Minnesota corporationInventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Patent number: 6638301Abstract: An endoprosthesis, such as a stent, having a layer that can enhance the biocompatibility of the endoprosthesis, and methods of making the endoprosthesis are disclosed.Type: GrantFiled: October 2, 2002Date of Patent: October 28, 2003Assignee: SciMed Life Systems, Inc.Inventors: Verivada Chandrasekaran, Karl Morris Schmidt, Christopher Torres Molina
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Patent number: 6562031Abstract: A system for recanalizing an occluded blood vessel including a centering catheter employed to center an ablative guide wire within the blood vessel as the guide wire traverses the occlusion. The centering catheter includes a catheter body with an operative lumen through which the ablative guide wire is slidingly disposed. The centering catheter further includes a distally disposed centering mechanism that, when activated, centers the ablative guide wire within the blood vessel as it traverses the occlusion. The centering mechanism can comprise various embodiments including a single inflatable balloon or segmented inflatable balloon, which is in fluid communication with an inflation lumen. An airless preparation lumen may be disposed within the inflation lumen for ease of centering catheter preparation. The ablative guide wire includes insulation that is preferably formed of heat shrink tubing, which is stretched prior or concurrently with the heating process.Type: GrantFiled: March 20, 2001Date of Patent: May 13, 2003Assignee: Scime Life Systems, Inc.Inventors: Verivada Chandrasekaran, Zihong Guo, Brooke Qin Ren, Byron Fedie
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Patent number: 6503227Abstract: An improved guide wire brake that is particularly suited to ablative rotational atherectomy devices is disclosed. The guide wire brake ensures that a guide wire is prevented from rotating or moving axially prior to activation of a primary mover such as a turbine. In one embodiment a pressure relief valve delays the activation of the prime mover on start up, and a check valve delays the release of the guide wire brake on shut down. In a second embodiment the guide wire brake is serially connected to the prime mover such that the prime mover is not connected to the pressurized gas source until after the guide wire brake is engaged. In a third embodiment a guide wire is disposed through a flexible tube within a rigid cylinder that is serially connected to the prime mover, such that when pressurized gas is provided to the prime mover the flexible tube will collapse on the guide wire, to prevent guide wire movement.Type: GrantFiled: July 24, 2000Date of Patent: January 7, 2003Assignee: SciMed Life Systems, Inc.Inventors: Zihong Guo, Verivada Chandrasekaran
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Patent number: 6451037Abstract: An atherectomy burr having an operating diameter that is larger than the diameter of a catheter in which the burr is routed. The burr may include a flexible polymeric tube that is plated with an abrasive and that expands when the burr is rotated. Metal fibers are embedded into burr to improve strength and to control the maximum expansion diameter of the burr. The abrasive is plated on the burr by first selectively exposing the underlying metal. The exposed metal is then plated with a layer of metal such as nickel having a slurry of diamond particles disposed therein using an electro and/or electroless plating method. When the burr is rotated, the polymeric tube expands by centrifugal force to ablate a new lumen in the patient's vessel.Type: GrantFiled: November 22, 2000Date of Patent: September 17, 2002Assignee: SCIMED Life Systems, Inc.Inventors: Verivada Chandrasekaran, Thomas J. Hiblar
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Publication number: 20010012934Abstract: A system for recanalizing an occluded blood vessel including a centering catheter employed to center an ablative guide wire within the blood vessel as the guide wire traverses the occlusion. The centering catheter includes a catheter body with an operative lumen through which the ablative guide wire is slidingly disposed. The centering catheter further includes a distally disposed centering mechanism that, when activated, centers the ablative guide wire within the blood vessel as it traverses the occlusion. The centering mechanism can comprise various embodiments including a single inflatable balloon or segmented inflatable balloon, which is in fluid communication with an inflation lumen. An airless preparation lumen may be disposed within the inflation lumen for ease of centering catheter preparation. The ablative guide wire includes insulation that is preferably formed of heat shrink tubing, which is stretched prior or concurrently with the heating process.Type: ApplicationFiled: March 20, 2001Publication date: August 9, 2001Applicant: SCIMED Life Systems, Inc.Inventors: Verivada Chandrasekaran, Zihong Guo, Brooke Qin Ren, Byron Fedie
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Patent number: 6210408Abstract: A system for recanalizing an occluded blood vessel including a centering catheter employed to center an ablative guide wire within the blood vessel as the guide wire traverses the occlusion. The centering catheter includes a catheter body with an operative lumen through which the ablative guide wire is slidingly disposed. The centering catheter further includes a distally disposed centering mechanism that, when activated, centers the ablative guide wire within the blood vessel as it traverses the occlusion. The centering mechanism can comprise various embodiments including a single inflatable balloon or segmented inflatable balloon, which is in fluid communication with an inflation lumen. An airless preparation lumen may be disposed within the inflation lumen for ease of centering catheter preparation. The ablative guide wire includes insulation that is preferably formed of heat shrink tubing, which is stretched prior or concurrently with the heating process.Type: GrantFiled: February 24, 1999Date of Patent: April 3, 2001Assignee: SciMed Life Systems, Inc.Inventors: Verivada Chandrasekaran, Zihong Guo, Brooke Qin Ren, Byron Fedie