Patent ID: 9492585
Filing Date: 2016-11-15
CPC Classification: A61L,C01B

Claim Text:
1. A porous granular calcium phosphate material, comprising discrete porous granules each containing crystals of at least one calcium phosphate, wherein (i) at least 90% of said crystals of the granules have a crystal size in the range 1.0-100 nm, where the crystal size is the longest dimension of the crystal as seen in a cross-sectional SEM, (ii) at least 90% of the pores in the granules have a pore size in the range 10-500 nm, wherein the pore size is the longest dimension of the pore as seen in a cross-sectional SEM, (iii)the average pore size of the pores having pore size in the range 10-500 nm in the granules is in the range 30-90 nm, as measured by mercury intrusion porosimetry, (iv) the total volume porosity of the granules, measured using Archimedes's principle, is at least 50% , and (v) the surface area of the granules, measured by the BET method, is in the range 1 0-70 m wherein at least 90% of said crystals have at least one dimension of not more than 50 nm as seen in a cross-sectional SEM, and wherein said crystals of said granules are in a substantially unsintered stat.