Zhicheng Lin

US Patent:

8323327, Dec 4, 2012

Filed:

Aug 16, 2010

Appl. No.:

12/857467

Inventors:

Nianjiong Joan Bei - Foster City CA, US
Keif Fitzgerald - San Jose CA, US
Patrick C. Saxton - Santa Clara CA, US
Zhicheng Lin - Palo Alto CA, US
Steven A. Tyler - Portola Valley CA, US
Joanna Lubas - Fremont CA, US

Assignee:

Abbott Cardiovascular Shstems Inc. - Santa Clara CA

International Classification:

A61F 2/06

US Classification:

623 111, 623 112, 606108, 606198, 606200

Abstract:

A catheter system for implanting an endoprosthesis at a treatment site in a patient's body lumen. The catheter includes an elongated shaft outer member and a stent sheath distal portion and a self-expanding stent radially restrained in a collapsed configuration within the stent sheath distal portion. A balloon catheter dimensioned for relative axial movement within the shaft outer member has an elongated shaft having an inflation lumen and a device receiving lumen. A stent stop secured to the balloon catheter is reversibly radially expandable to deploy from a collapsed to a radially expanded configuration. In the expanded configuration, the stent stop prevents longitudinal displacement of the stent. A balloon is located on a distal shaft section is releasably locked with respect to the shaft outer member and slidably disposed therein in an unlocked configuration.

US Patent:

8398789, Mar 19, 2013

Filed:

Nov 26, 2008

Appl. No.:

12/324732

Inventors:

Sophia L. Wong - Milpitas CA, US
Zhicheng Lin - Palo Alto CA, US

Assignee:

Abbott Laboratories - Abbott Park IL

International Classification:

A61L 27/06
C22C 14/00

US Classification:

148563, 148564, 623 118, 623 2353

Abstract:

Superelastic and/or shape memory nickel-titanium alloys having an increased fatigue life that is superior to known nickel-titanium alloys are disclosed. The nickel-titanium alloys have a minimum fatigue life that may be at least about 10 million strain cycles at a strain of at least about 0. 75. The minimum fatigue life may be due, at least in part, to the nickel-titanium alloy having at least one of an oxygen concentration of less than about 200 ppm, a carbon concentration of less than about 200 ppm, the absence of oxide-based and/or carbide-based inclusions having a size greater than about 5 microns (μm), the presence of an R-phase, or combinations of the foregoing. Articles manufactured from such fatigue-resistant nickel-titanium alloys can be more durable because they are more resistant to repetitive strain and crack propagation.

US Patent:

20080269868, Oct 30, 2008

Filed:

Apr 25, 2007

Appl. No.:

11/739743

Inventors:

Nianjiong Joan Bei - Foster City CA, US
Keif Fitzgerald - San Jose CA, US
Patrick C. Saxton - Santa Clara CA, US
Zhicheng Lin - Palo Alto CA, US
Steven A. Tyler - Portola Valley CA, US
Joanna Lubas - Fremont CA, US

Assignee:

ABBOTT CARDIOVASCULAR SYSTEMS INC. - Santa Clara CA

International Classification:

A61F 2/06

US Classification:

623 111

Abstract:

A catheter system and method for implanting an i such as a stent at a treatment site in a patient's body lumen. The catheter provides a complete system for stent delivery, dilatation, and delivery and/or recovery of an expandable device, such as an embolic protection device, adjacent to the treatment site in the body lumen.

US Patent:

20130205567, Aug 15, 2013

Filed:

Mar 15, 2013

Appl. No.:

13/839959

Inventors:

Abbott Laboratories - , US
Zhicheng Lin - Palo Alto CA, US

Assignee:

ABBOTT LABORATORIES - Abbott Park IL

International Classification:

B23P 17/00

US Classification:

29446

Abstract:

Superelastic and/or shape memory nickel-titanium alloys having an increased fatigue life that is superior to known nickel-titanium alloys are disclosed. The nickel-titanium alloys have a minimum fatigue life that may be at least about 10 million strain cycles at a strain greater than about 0.75%. The minimum fatigue life may be due, at least in part, to the nickel-titanium alloy having at least one of an oxygen concentration of less than about 200 ppm, a carbon concentration of less than about 200 ppm, the absence of oxide-based and/or carbide-based inclusions having a size greater than about 5 microns (μm), the presence of an R-phase, or combinations of the foregoing. Articles manufactured from such fatigue-resistant nickel-titanium alloys can be more durable because they are more resistant to repetitive strain and crack propagation.

US Patent:

20140014530, Jan 16, 2014

Filed:

Jul 13, 2012

Appl. No.:

13/548908

Inventors:

Zhicheng Lin - Palo Alto CA, US

Assignee:

Abbott Cardiovascular Systems, Inc. - Santa Clara CA

International Classification:

C25F 3/16

US Classification:

205660

Abstract:

The present disclosure is directed to methods of manufacturing and passivating stents and other implantable medical devices including one or more attached radiopaque markers. In one embodiment, the method includes providing a metallic implantable medical device body without any radiopaque marker(s) attached thereto, primary electropolishing the device body without any markers attached thereto, attaching one or more radiopaque markers to the device body, and lightly electropolishing the device including device body and attached radiopaque markers. Light electropolishing removes no more than about 5 percent by weight of the device (i.e., the device body and attached marker(s)). Light electropolishing passivates the exposed surfaces of the device body and markers, while also providing electropolishing to the region of any welds where the radiopaque marker(s) attach to the device body.

US Patent:

20170172769, Jun 22, 2017

Filed:

Dec 17, 2015

Appl. No.:

14/973628

Inventors:

- Santa Clara CA, US
Chad Abunassar - San Francisco CA, US
Senthil Eswaran - Sunnyvale CA, US
Zhicheng Lin - Palo Alto CA, US

International Classification:

A61F 2/915
A61F 2/958
B29C 65/56
A61F 2/844

Abstract:

A thin-walled scaffold includes a radiopaque marker connected to a link. In a first example, the marker is retained on the strut by a head at one or both ends by swaging. In a second example of a thin-walled scaffold the link is modified to avoid interference during crimping. In a third example a distal end of the thin-walled scaffold is modified to improve deliverability of the thin-walled scaffold. These features are combined in a fourth example.

US Patent:

20150196693, Jul 16, 2015

Filed:

Mar 24, 2015

Appl. No.:

14/667279

Inventors:

- Santa Clara CA, US
Zhicheng Lin - Palo Alto CA, US

International Classification:

A61L 31/18
A61F 2/86
A61L 31/02

Abstract:

The present disclosure is directed to methods of manufacturing and passivating stents and other implantable medical devices including one or more attached radiopaque markers. In one embodiment, the method includes providing a metallic implantable medical device body without any radiopaque marker(s) attached thereto, primary electropolishing the device body without any markers attached thereto, attaching one or more radiopaque markers to the device body, and lightly electropolishing the device including device body and attached radiopaque markers. Light electropolishing removes no more than about 5 percent by weight of the device (i.e., the device body and attached marker(s)). Light electropolishing passivates the exposed surfaces of the device body and markers, while also providing electropolishing to the region of any welds where the radiopaque marker(s) attach to the device body.