| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 2 | |
| #2 | Sweden | 2 | |
| #3 | Austria | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Germany | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | India | 1 | |
| #9 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Thermal processes | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Building materials | |
| #2 | Manufacturing processes | |
| #3 | Furnaces | |
| #4 | Details of furnaces | |
| #5 | Treatment of glass | |
| #6 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | North John Walton | 7 |
| Publication | Filing date | Title |
|---|---|---|
| EP0045303A1 | Process and apparatus for producing cellulated vitreous products. | |
| DE2629940A1 | Bloated cellular clay based prod. - prepd from natural clayey material and useful as building material | |
| IT1062258B | Bloated cellular clay based prod. - prepd from natural clayey material and useful as building material | |
| CH611830A5 | Method for preparing a porous product |