Last seen in:
- Newsday.com - Apr 18 2019
- Universal - Sep 27 2017
- Thomas Joseph - King Feature Syndicate - Aug 31 2017
- Thomas Joseph - King Feature Syndicate - Dec 8 2015
- Eugene Sheffer - King Feature Syndicate - Nov 24 2014
- Eugene Sheffer - King Feature Syndicate - Feb 22 2014
- L.A. Times Daily - Nov 2 2011
- L.A. Times Magazine - Feb 15 2009
- Universal - Jul 20 2004
Related Clues:
- Cryogenic refrigerant
- Refrigerator compound
- Crude petroleum component
- DuPont refrigerant
- Fuel hydrocarbon
- Common refrigerant
- Fuel choice
- Banned refrigerant
- Refrigerator gas
- Natural-gas component
- Colorless gas
- Gas used as fuel
- DuPont trademark
- Refrigerator chemical
- Refrigerant trademark since the 1930s