| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 4 | |
| #2 | United Kingdom | 3 | |
| #3 | Switzerland | 2 | |
| #4 | Germany | 2 | |
| #5 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Environmental technology | |
| #3 | Basic materials chemistry | |
| #4 | Chemical engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | H Gasverarbeitungsgesellschaft | 2 |
| #2 | Jost Friedrick | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE528500C | Extraction of sulfur from sulphurous masses | |
| GB307027A | Improvements in and relating to the heating of gases | |
| GB294580A | Improvements in or relating to the production of hydrogen | |
| GB293361A | Improvements in methods of drying gases or gas mixtures for the synthesis of ammonia | |
| DE503913C | Process for heating coke ovens | |
| CA294017A | Method of drying gases or gas mixtures |