Patent ID: 7704903

Claim:
An antimicrobially acting phosphate glass composition comprising, in weight percent on an oxide basis: between greater than 45 and less than or equal to 90 of P 2 O 5 ; 0 to 55 of B 2 O 3 ; 0 to 40 of SiO 2 ; 0 to 20 of Al 2 O 3 ; 0 to 30 of SO 3 ; 0 to 0.1 of Li 2 O; 0 to 0.1 of Na 2 O; 0 to 0.1 of K 2 O; 0 to 40 of CaO; 0 to 40 of MgO; 0 to 15 of SrO; 0 to 40 of BaO; 0 to 40 of ZnO; greater than 0.1 but less than or equal to 3 of Ag 2 O; 0 to 15 of CuO; 0 to 10 of Cr 2 O 3 ; 0 to 10 of I; 0 to 10 of TeO 2 ; 0 to 10 of GeO 2 ; 0 to 10 of TiO 2 ; 0 to 10 of ZrO 2 ; 0 to 10 of La 2 O 3 ; 0 to 5 of Nb 2 O 3 ; 0 to 5 of CeO 2 ; 0 to 5 of Fe 2 O 3 ; 0 to 5 of WO 3 ; 0 to 5 of Bi 2 O 3 ; and 0 to 5 of MoO 3 , wherein a first sum formed from the TiO 2 , the ZrO 2 , the BaO, the La 2 O 3 , the Cr 2 O 3 , and the Nb 2 O 3 lies in a range of 0.01 to 40 weight percent on oxide basis, wherein a second sum formed from the Ag 2 O, the ZnO, the CuO, the Cr 2 O 3 , the I, the TeO 2 , and the GeO 2 lies in a range of 0.1 to 40 weight percent on oxide basis, and wherein the composition is free of non-contaminant Sn.