DW

Douglas Dale Warkentin

📍 Vancouver, CA: #1,013 of 5,070 inventorsTop 20%
Overall (All Time): #979,544 of 4,157,543Top 25%
5
Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
10308523 Processing of cobaltous sulphate/dithionate liquors derived from cobalt resource Norman Chow, Joey Jung, Anca-Mihaela Nacu 2019-06-04
10246343 Processing of cobaltous sulpha/dithionate liquors derived from cobalt resource Norman Chow, Joey Jung, Anca-Mihaela Nacu 2019-04-02
9566587 Methods of and systems for treating incinerated waste Michael Rowley 2017-02-14
8460631 Processing of manganous sulphate/dithionate liquors derived from manganese resource material Norman Chow, Anca-Mihaela Nacu, John Fisher 2013-06-11
5587079 Process for treating solutions containing sulfate and metal ions. Michael Rowley, Beverly M. Piroshco 1996-12-24