Patent ID: 6838440

Claim:
A method of preparing cartilage-derived material comprising collagen type II in powder form, comprising the steps: (a) cutting avian sternal cartilage to within not less than 2 mm of the sternum and removing the cut sternal cartilage from the sternum; (b) freezing the cut sternal cartilage into frozen cartilage; (c) grinding the frozen cartilage into ground-cartilage; (d) suspending the ground cartilage in an aqueous solution; (e) sterilizing the ground cartilage; (f) filtering the sterilized ground cartilage; (g) defatting the ground cartilage; (h) filtering the defatted ground cartilage; (i) drying the ground cartilage; and (j) milling the dried ground cartilage into powder form.