Implant with increased carbon content at near-surface boundary layer

US9381100B2 · kind B2 · utility

Assignee

• BIOTRONIK VI Patent AG · CH

Inventors

• Ullrich Bayer · Bad Doberan, DE
• Bodo Gerold · Zellingen, DE

Key dates

• Filing date: Jul 8, 2013
• Grant date: Jul 5, 2016
• Expiry date: Dec 3, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23C8/32
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Implant in the form of an intraluminal endoprosthesis, having a tubular body containing metallic material, optionally iron, whereby in at least a portion of the implant body the following are present in the structure of a near-surface boundary layer in comparison to the respective concentration in the remaining structure: an increased carbon content in a concentration of approximately 0.5% by weight to approximately 2% by weight; or an increased carbon and nitrogen content, wherein a concentration of carbon is approximately 0.5% by weight to approximately 7% by weight, and a concentration of nitrogen is approximately 0.5% by weight to approximately 17% by weight.