04.02.18
US Patent No. 9,554,974 B2; Tieh-Chun Tang of Rowland Heights, CA has patented a method for the large scale industrial production of a dentifrice powder containing pure nano calcium supplements obtained from raw materials including pearl, mother of pearl, red coral, 22-28 oyster shells, clam shells, and giant clam shells. The following steps are applied separately to each of said raw materials:
A. sand blasting each raw material to remove surface contaminants;
B. grinding each raw material into 200-400 micron particles;
C. heating said particles in inert gas to a decomposition temperature;
D. grinding again after decomposition, until 30-50 micron particles are obtained;
E. nanometer lapping until one nanometer calcium supplements are obtained;
F. mixing the supplements obtained from step E for each raw material; and
G. formulating a dentifrice powder containing said mixed supplements.
A. sand blasting each raw material to remove surface contaminants;
B. grinding each raw material into 200-400 micron particles;
C. heating said particles in inert gas to a decomposition temperature;
D. grinding again after decomposition, until 30-50 micron particles are obtained;
E. nanometer lapping until one nanometer calcium supplements are obtained;
F. mixing the supplements obtained from step E for each raw material; and
G. formulating a dentifrice powder containing said mixed supplements.