AIRCRAFT DEICING
Even though the technology has never been commercialized, the use of foam for airplane deicing has been suggested. It is logical to conclude that a significant volume of glycols could be saved each winter season if the efficiency of a foam medium could be accommodated. On the other hand, obtaining permission from the FAA, the plane builders, the airlines, and the airport authorities, coupled with a high risk financial liability, probably overwhelms the business opportunity. See, however, the patent assigned to Shell:
Dawtry, S. and King, H.C., U.S. Patent 3,350,314, October 31, 1967
Foamable Deicing/Defrosting Composition and Method of Deicing and Defrosting