Patent ID: 6436858
Filing Date: 2002-08-20
Classification: C03C,Y10T

Abstract:
Organic lens mold comprising at least one inorganic glass comprising the following composition, expressed in percentages by weight:SiO256- 66Al2O32.5-10â€‰B2O30.5-7â€‚â€‰Li2O0-  3Na2Oâ€‚ 8-  15K2Oâ€‚ 3-  12withLi2O + Na2O + K2O12- 20ZnOâ€‚ 2-  12MgO0-  3TiO2â€‚â€‰0-  0.5ZrO21-  9CaO0-  1BaO0-  2SrO0-  2withMgO + CaO + SrO + BaO0-  5Clâ€‚â€‰0-  0.5As2O3 + Sb2O3â€‰0-  1.