Inventor · disambiguated record
John Campbell
Also filed as: CAMPBELL JOHN · CAMPBELL JOHN GORDON MACKAY
12 granted patents·2 pending applications·26 citations·filing 1993–2014
86Inventor score
Top patents by PatentIndex Score
14 records- 0177US5433855AProcess for extracting metal values from aqueous solutionZENECA LTD·Filed 1993·Granted Jul 18, 1995·15 cites·22 claims
- 0272US8088810B2Phenoxypyrazole composition and process for the solvent extraction of metalsCAMPBELL JOHN·Filed 2006·Granted Jan 3, 2012·1 cites·18 claims
- 0370US8470052B2Phenoxypyrazole composition and process for the solvent extraction of metalsCAMPBELL JOHN·Filed 2011·Granted Jun 25, 2013·1 cites·24 claims
- 0461US8329124B2Metal extractant reagents having increased resistance to degradationCAMPBELL JOHN·Filed 2009·Granted Dec 11, 2012·0 cites·23 claims
- 0560US2014264166A1Phenoxypyrazole composition and process for the solvent extraction of metalsCYTEC TECH CORP·Filed 2014·Application pending·0 cites
- 0658US2013264519A1Phenoxypyrazole Composition and Process for the Solvent Extraction of MetalsCYTEC TECH CORP·Filed 2013·Application pending·0 cites
- 0756US8609063B2Metal extractant reagents having increased resistance to degradationCAMPBELL JOHN·Filed 2012·Granted Dec 17, 2013·0 cites·15 claims
- 0849US8349208B2Modification of copper/iron selectivity in copper solvent extraction systemsCYTEC TECH CORP·Filed 2012·Granted Jan 8, 2013·0 cites·8 claims
- 0949US5393431AProcess for extracting metalsZENECA LTD·Filed 1993·Granted Feb 28, 1995·5 cites·9 claims
- 1045US9989664B2Process for mining alluvial depositsVDL GOLD PTY LTD·Filed 2013·Granted Jun 5, 2018·1 cites·22 claims
- 1141US8282857B2Modification of copper/iron selectivity in copper solvent extraction systemsTINKLER OWEN STEWART·Filed 2006·Granted Oct 9, 2012·0 cites·9 claims
- 1239US5728853AChemical processZENECA LTD·Filed 1996·Granted Mar 17, 1998·3 cites·16 claims
- 1331US5502250ABis(dialkylthiophosphoryl)amines as metal extractantsZENECA LTD·Filed 1994·Granted Mar 26, 1996·0 cites·5 claims
- 1430US5557003AAlkylphenoxy substituted bis (thio phosphoryl) aminesZENECA LTD·Filed 1995·Granted Sep 17, 1996·0 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →