| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 2 | |
| #2 | Switzerland | 2 | |
| #3 | Germany | 2 | |
| #4 | African Intellectual Property Organization | 2 | |
| #5 | Belgium | 1 | |
| #6 | Brazil | 1 | |
| #7 | France | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Norway | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Metal production and refining | |
| #2 | Alloys |
| # | Name | Total Patents |
|---|---|---|
| #1 | Derham L | 2 |
| #2 | Leslie Jack Derham | 2 |
| #3 | Derham Leslie J | 2 |
| #4 | Jack Derham Leslie | 1 |
| #5 | Derham Leslie Jack | 1 |
| #6 | Derham M G | 1 |
| #7 | Derham M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1309266A | Purification of molten aluminium | |
| DE1912887A1 | Process for cleaning aluminum and aluminum alloys | |
| CA876033A | Purification of aluminium | |
| CA911740A | Purification of molten metals |