Spevack was an American scientist, inventor, and engineer who developed the "dual temperature exchange sulphide process" (known as the Girdler sulfide process) in 1943 while working on the Manhattan Project.
[2] This is regarded as the most cost-effective process for producing heavy water.
A parallel development of this process was also achieved in 1943 by German physical chemist Karl-Hermann Geib.
[3] After World War II, Spevack became president of Deuterium of Canada Limited (DCL) [4] and, in 1974, won a lawsuit[5] against the United States government and its Atomic Energy Commission receiving protection, and compensation of US$1.5 million, over their use of the Girdler sulfide process without his consent.
This biographical article about a chemist is a stub.