[The_rationalist]

So this state of the art technology is no longer used for newer jets?

[scoopertrooper]

The fuel was formulated to meet the engineering requirements of a very particular product that was rendered outmoded by developments in satellite and UAV technology.

[throwanem]

State of the art for the late 50s. Most jets then and now don't operate in regimes where a fuel like this would be necessary.