GLASS BLOCK FOR WINDOW STRUCTURES Russian patent published in 2001 - IPC

FIELD: glass block structures for glazing windows of industrial and residential building. SUBSTANCE: glass block has external, intermediate, and internal sheets of window glass. External and intermediate sheets of window glass form enclosed inner space. Coating that reflects infrared rays is applied to inner surface of external sheet. Enclosed inner space is evacuated to vacuum pressure. Outer enclosed space is filled with gas. EFFECT: enhanced heat transfer resistance with provision for warming-up external sheet. 3 cl, 4 dwg