Which innovative product design development in the 1950s-60s made floor-to-ceiling glass walls and curtain wall systems practical for skyscrapers?

Test your knowledge about a groundbreaking product design innovation that revolutionized modern architecture. This question explores how certain building materials transformed architectural possibilities and aesthetic approaches. The answer reveals an important connection between product development and architectural advancement that changed the industry forever.

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Float glass process (developed by Pilkington)
Reinforced concrete panels (developed by SOM)
Aluminum extrusion technology (developed by Alcoa)
Structural silicone glazing (developed by Dow Corning)