Thomas Midgley Jr.
American chemist and engineer (1889–1944)
United StatesSummary
Updated 2026-05-29
Midgley racked up 100+ patents as a mechanical and chemical engineer, most notably leaded gasoline and CFCs—both later banned for being catastrophically toxic. He's the rare inventor whose legacy is defined by what we had to undo.
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Thomas Midgley Jr. was an American mechanical and chemical engineer. He played a major role in developing leaded gasoline and some of the first chlorofluorocarbons (CFCs), better known in the United States by the brand name Freon; both products were later banned from common use due to their harmful impact on human health and the environment. He was granted more than 100 patents over the course of his career.
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Falling19.6
Composite of search demand, mentions, audience & graph footprint.
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Historical19.8
Source confidence60.0
Completeness70.0
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- WikipediaHigh confidencewikipedia · en.wikipedia.org
- WikidataHigh confidencewikidata · wikidata.org
- Pantheon 2.0High confidencedatabase · pantheon.world
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