Loading patent…
AssigneeQueen Mary & Westfield College
InventorsWilliam Bonfield, Serena M. Best, Jake E. Barralet
Estimating the term…
A method for the preparation of a carbonated hydroxyapatite composition which has a density of at least 95% of the theoretical density, which method comprises sintering at substantially atmosphere pressure a green carbonated hydroxyapatite composition containing up to 20% by weight of CO.sub.3.sup.2- ions and having a green density of from 25 to 60% of the theoretical density at a temperature in the range of from 750.degree. to 1450.degree. C. in carbon dioxide containing from 0.001 to 0.10 grams of water per liter of gas, the sintering temperature being selected within the above range and the green composition being sintered for a period of time sufficient to cause the green composition to densify to at least 95% of the theoretical density.
A method for the preparation of a carbonated hydroxyapatite composition which has a density of at least 95% of the theoretical density, which method comprises sintering at substantially atmosphere pressure a dry green carbonated hydroxyapatite compact which contains up to 20% by weight of CO.sub.3 ions but which does not contain any binder and which has a green density of from 25 to 60% of the theoretical density at a temperature in the range of from 750.degree. to 1450.degree. C. in carbon dioxide containing from 0.001 to 0.10 grams of water per liter of gas, the sintering temperature being selected within the above range and the green compact being sintered for a period of time sufficient to cause the green compact to densify to at least 95% of the theoretical density.
A method for the preparation of a carbonated hydroxyapatite composition which has a density of at least 95% of the theoretical density, which method comprises sintering at substantially atmosphere pressure a dry green carbonated hydroxyapatite compact which contains up to 20% by weight of CO.sub.3 ions but which does not contain any binder at a temperature in the range of from 1000.degree. to 1450.degree. C. in carbon dioxide containing from 0.001 to 0.10 grams of water per liter of gas, for a period of time sufficient to cause the green compact to densify to at least 95% of the theoretical density.
Dependencies are inferred from the claim text.