1. 2,904,580 1959 J. D. Idol The Standard Oil Co.
2. 876,446 1959
3. 3,152,170 1964 J. L. Barclay J. B. Bream D. J. Hadley D. G. Stewart Distillers Company Ltd.
4. R. M. Paterson M. I. Bornstein E. Garshick Assessment of Acrylonitrile as a Potential Air Pollution Problem 1976