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Boris Viktorovich Gavronsky
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Donetsk, SU
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last 30 patents
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Patent Grant
Method of refining of metal
Patent number
4,140,522
Issue date
Feb 20, 1979
Leonid I. Krupman
C21 - METALLURGY OF IRON
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Patent Grant
Slag-forming mixture
Patent number
3,964,900
Issue date
Jun 22, 1976
Leonid Isaakovich Krupman
C21 - METALLURGY OF IRON