Ava J. Johnson, US2472254A
Apparatus and Method for Carrying out Catalytic Reactions.
Image credit: Johnson, A. (1944)
On June 7, 1949, Ava J. Johnson of Oakland, California, an assignor to Shell Development Company, patented a novel method for carrying out endothermic catalytic reactions. Her process balanced endothermic and exothermic steps inside a multi-zone reactor, extending catalyst life and boosting yields.
Date of Application: 22 August 1944
Date of Issuance: 7 June 1949
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Francesca Chiaradia
PhD Candidate in Economics
My research interests include innovation, law, and information economics.