| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | Australia | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Thermal processes | |
| #3 | Materials and metallurgy | |
| #4 | Machines | |
| #5 | Organic fine chemistry | |
| #6 | Chemical engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Keus Arie | 11 |
| #2 | Conant Lawrence D | 8 |
| Publication | Filing date | Title |
|---|---|---|
| US6451269B1 | Liquid hydrate regeneration of contaminated acids | |
| AU1796099A | Waste acid recovery | |
| AU6945498A | Sulfuric acid purification process | |
| EP0730893A1 | Freeze crystallization concentration methods and apparatus | |
| US5394706A | Freeze crystallization for the removal of water from a solution of dissolved solids |