John L. Leng

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St. Albans, GB

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Patents Grantslast 30 patents

Information Patent Grant
Composition and use of composition for the extraction of metal values
- Patent number 6,277,300
- Issue date Aug 21, 2001
- Zeneca Limited
- Raymond Frederick Dalton
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Composition and use of the composition for the extraction of metals...
- Patent number 6,113,804
- Issue date Sep 5, 2000
- Imperial Chemical Industries PLC
- Raymond Frederick Dalton
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Composition and use of the composition for the extraction of metals...
- Patent number 5,281,336
- Issue date Jan 25, 1994
- Imperial Chemical Industries PLC
- Raymond F. Dalton
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Composition and use of the composition for the extraction of metals...
- Patent number 5,176,843
- Issue date Jan 5, 1993
- Imperial Chemical Industries PLC
- Raymond F. Dalton
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Composition and use of the composition for the extraction of metals...
- Patent number 4,978,788
- Issue date Dec 18, 1990
- Imperial Chemical Industries PLC
- Raymond F. Dalton
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...