Robert Oliver Hill

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Johannesburg, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Process of extraction of aluminum values from coal ash
- Patent number 4,243,640
- Issue date Jan 6, 1981
- Robert O. Hill
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method of producing phosphoric acid from high iron and aluminum con...
- Patent number 4,039,624
- Issue date Aug 2, 1977
- National Process Industries (Proprietary) Limited
- Robert Oliver Hill
- C05 - FERTILISERS MANUFACTURE THEREOF