Stainless steel alloy having lowered nickel-chrominum toxicity and improved biocompatibility
First Claim
Patent Images
1. A medical implant, comprising:
- A member formed of a non-magnetic, austenitic steel alloy comprisingchromium,nickel,2.0 weight percent or greater of platinum andiron;
wherein a total amount of chromium and nickel in the non-magnetic, austenitic steel alloy is less than or equal to 19 weight percent; and
wherein the medical implant is an endoprosthesis comprising a member capable of supporting a body passageway, the member being formed of the non-magnetic, austenitic steel alloy.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention is directed towards an austenitic, stainless steel series 300 alloy having improved biocompatible characteristics. The modified stainless steel alloy consists essentially of, in weight percent, about
whereby variable “X” could be comprised from a group consisting of Gold, Osmium, Palladium, Platinum, Rhenium, Tantalum, or Tungsten. The alloy provides a unique combination of strength, ductility, corrosion resistance, and other mechanical properties which also has improved biocompatible characteristics.
-
Citations
19 Claims
-
1. A medical implant, comprising:
-
A member formed of a non-magnetic, austenitic steel alloy comprising chromium, nickel, 2.0 weight percent or greater of platinum and iron; wherein a total amount of chromium and nickel in the non-magnetic, austenitic steel alloy is less than or equal to 19 weight percent; and wherein the medical implant is an endoprosthesis comprising a member capable of supporting a body passageway, the member being formed of the non-magnetic, austenitic steel alloy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A medical implant, comprising:
-
A member formed of a non-magnetic, austenitic steel alloy comprising chromium, less than or equal to 7.5 weight percent of nickel, 2.0 weight percent or greater of platinum and about 46 weight percent or greater of iron; wherein the medical implant is a stent. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A medical implant, comprising a member consisting essentially of an alloy comprising:
-
about 46 weight percent or greater of iron; and between 2.0 weight percent and 10.0 weight percent of a first element selected from the group consisting of palladium and platinum; with the proviso that the alloy includes; less than or equal to 7.5 weight percent of nickel; and less than or equal to 11.5 weight percent chromium; wherein the medical implant is an endoprosthesis; and wherein the member is capable of supporting a body passageway. - View Dependent Claims (18, 19)
-
Specification