Leon Velasco

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Caracas, VE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of petroleum tar pitch for use as a bind...
- Patent number 4,961,837
- Issue date Oct 9, 1990
- Intevep, S.A.
- Leon Velasco
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...