David Wilbur Knapp

US Patent:

20030018380, Jan 23, 2003

Filed:

Mar 28, 2002

Appl. No.:

10/112391

Inventors:

Charles Craig - Lakeside CA, US
Herbert Radisch - San Diego CA, US
Thomas Trozera - Del Mar CA, US
David Knapp - Saint Paul MN, US
Timothy Girton - Edina MN, US
Jonathan Stinson - Plymouth MN, US

International Classification:

A61F002/06

US Classification:

623/001150, 623/924000

Abstract:

A platinum enhanced radiopaque alloy particularly suitable for manufacture of implantable and/or intravascular medical devices. A stent is one preferred medical device which is a generally tubular structure that is expandable upon implantation in a vessel lumen to maintain flow therethrough. The stent is formed from the alloy which has improved radiopacity relative to present utilized stainless steel alloys. This alloy preferably contains from about 2 wt. % to about 50 wt. % platinum; from about 11 wt. % to about 18 wt. % chromium; about 5 wt. % to about 12 wt. % nickel and at least about 15 wt. % iron.

US Patent:

20120004718, Jan 5, 2012

Filed:

Nov 29, 2010

Appl. No.:

12/955522

Inventors:

Charles H. Craig - Lakeside CA, US
Thomas A. Trozera - Del Mar CA, US
David M. Knapp - Shoreview MN, US
Timothy S. Girton - Edina MN, US
Jonathan S. Stinson - Minneapolis MN, US

Assignee:

BOSTON SCIENTIFIC SCIMED, INC. - Maple Grove MN

International Classification:

A61F 2/82

US Classification:

623 115

Abstract:

A platinum enhanced radiopaque alloy particularly suitable for manufacture of implantable and/or intravascular medical devices. A stent is one preferred medical device which is a generally tubular structure that is expandable upon implantation in a vessel lumen to maintain flow therethrough. The stent is formed from the alloy which has improved radiopacity relative to present utilized stainless steel alloys. This alloy preferably contains from about 2 wt. % to about 50 wt. % platinum; from about 11 wt. % to about 18 wt. % chromium; about 5 wt. % to about 12 wt. % nickel and at least about 15 wt. % iron.