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Robert E. Brewer — 23 Patents

PDPhelps Dodge: 18 patents #3 of 74Top 5%
FRFreeport-Mcmoran: 4 patents #15 of 72Top 25%
Elko, NV: #2 of 86 inventorsTop 3%
Nevada: #376 of 8,397 inventorsTop 5%
Overall (All Time): #178,160 of 4,157,543Top 5%
23 Patents All Time
Robert E. Brewer has been granted 23 US patents while listed as an inventor at Phelps Dodge. The first was granted in 1991 and the most recent in September 2011. Robert E. Brewer ranks #178,160 of 4,157,543 US inventors in our database (top 4.3%). Patent records list Robert E. Brewer in Elko, NV, US.

Issued Patents All Time

Showing 1–23 of 23 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8012318 Process for multiple stage direct electrowinning of copper John O. Marsden, Susan R Brewer, Joanna M. Robertson, David R. Baughman, Philip Thompson +2 more 2011-09-06 $263,052,000
7736488 Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction John O. Marsden, Susan R Brewer, Joanna M. Robertson, David R. Baughman, Philip Thompson +2 more 2010-06-15 $45,550,000
7722756 Process for multiple stage direct electrowinning of copper John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2010-05-25 $252,486,000
7666371 Method for recovering metal values from metal-containing materials using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman 2010-02-23 $327,694,000
7517384 Method for improving metals recovery using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2009-04-14
7485216 Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2009-02-03
7476308 Process for multiple stage direct electrowinning of copper John O. Marsden, Joanna M. Robertson, David R. Baughman, Phillip Thompson, Wayne W. Hazen +1 more 2009-01-13
7473413 Method for recovering metal values from metal-containing materials using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman 2009-01-06
7462272 Process for multiple stage direct electrowinning of copper John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2008-12-09
7341700 Method for recovery of metals from metal-containing materials using medium temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman +1 more 2008-03-11
7125436 Method for improving metals recovery using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2006-10-24 $185,754,000
7041152 Method for processing elemental sulfur-bearing materials using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman 2006-05-09 $171,807,000
6972107 System for direct electrowinning of copper John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2005-12-06 $110,651,000
6893482 Method for improving metals recovery using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2005-05-17 $62,081,000
6890371 Method for processing elemental sulfur-bearing materials using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman 2005-05-10 $59,780,000
6680034 Method for recovering metal values from metal-containing materials using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman 2004-01-20 $46,074,000
6676909 Method for recovery of metals from metal-containing materials using medium temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman +1 more 2004-01-13 $35,730,000
6663689 Process for direct electrowinning of copper John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2003-12-16 $41,652,000
6626979 Method for improving metals recovery using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2003-09-30 $32,231,000
6497745 Method for processing elemental sulfur-bearing materials using high temperature pressure leaching John O. Marsden, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson, David R. Baughman 2002-12-24 $24,007,000
6451088 Method for improving metals recovery using high temperature leaching John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2002-09-17 $9,865,000
6451089 Process for direct electrowinning of copper John O. Marsden, Joanna M. Robertson, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more 2002-09-17 $9,865,000
5071477 Process for recovery of gold from refractory ores Kenneth G. Thomas, Herman Pieterse, Kevin S. Fraser 1991-12-10

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