Patent ID: 7192602

Claim:
Water-insoluble, antimicrobial silicate glass powder, whereby the glass composition comprises the following components in wt. % based on oxides: SiO 2 32to 48 Na 2 O 23 to 32 P 2 O 2 5to 7 CaO 23 to 32 AgO 0.01 to 2 whereby the ratio of Ca/P lies in the range 2.0 to 6.0, and the size of the particles of the glass powder is <100 μm; and wherein the maximum concentrations of heavy metals are: Pb<20 ppm, Cd<5 ppm, As<5 ppm, Sb<10 ppm, Hg<1 ppm, and Ni<10 ppm.