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- 10 Millionth Catalytic Converter Built by AC Spark Plug Division of General Motors, 1976 - Fighting air pollution required changes in car design and gasoline. General Motors developed the first practical catalytic converter, which turned automobile exhaust into less-harmful gases, in response to the Clean Air Act of 1970. Beginning in 1975, federal regulations required catalytic converters and phasing-out of leaded gasoline, which interfered with the converters' operation.

- July 14, 1976
- Collections - Artifact
10 Millionth Catalytic Converter Built by AC Spark Plug Division of General Motors, 1976
Fighting air pollution required changes in car design and gasoline. General Motors developed the first practical catalytic converter, which turned automobile exhaust into less-harmful gases, in response to the Clean Air Act of 1970. Beginning in 1975, federal regulations required catalytic converters and phasing-out of leaded gasoline, which interfered with the converters' operation.
- Diagram of a Car's Catalytic Converter System, 1974 - As auto companies were increasingly pressured to comply with more stringent government regulations, the catalytic converter emerged as a popular device that both improved fuel economy and reduced emissions. Noxious by-products of combustion passed from the engine through the catalytic converter, where chemical reactions converted the emissions to less toxic substances.

- August 22, 1974
- Collections - Artifact
Diagram of a Car's Catalytic Converter System, 1974
As auto companies were increasingly pressured to comply with more stringent government regulations, the catalytic converter emerged as a popular device that both improved fuel economy and reduced emissions. Noxious by-products of combustion passed from the engine through the catalytic converter, where chemical reactions converted the emissions to less toxic substances.
- Catalytic Converter Model, 1970 - The Clean Air Act of 1970 required a dramatic reduction in tailpipe emissions. To comply, automobile manufacturers installed catalytic converters. Noxious byproducts of combustion passed from the engine through the catalytic converter, where chemical reactions converted the emissions to less toxic substances. This particular cutaway catalytic converter was used as evidence in a patent infringement suit.

- 1970
- Collections - Artifact
Catalytic Converter Model, 1970
The Clean Air Act of 1970 required a dramatic reduction in tailpipe emissions. To comply, automobile manufacturers installed catalytic converters. Noxious byproducts of combustion passed from the engine through the catalytic converter, where chemical reactions converted the emissions to less toxic substances. This particular cutaway catalytic converter was used as evidence in a patent infringement suit.