Patent ID: 7670636

Claim:
A method for the production of a metallic substrate with biocompatible surface, the method comprising providing a metal selected from the group consisting of: titanium; titanium alloys with aluminum, vanadium, tantalum, niobium, nickel, iron, molybdenum or mixtures thereof; tantalum; tantalum alloys with iron, aluminum, chromium or mixtures thereof; and stainless steel, and treating the metal with a melt at a temperature ranging from 180 to 480° C. for a period of from 0.1 to 12 hours, wherein the melt consists of calcium nitrate and an additional component, wherein the additional component is selected from the group consisting of an oxygen salt of sodium, potassium, lithium, magnesium and mixtures thereof, wherein a calcium content of the melt is at least 20% by weight, relative to a total weight of the melt.