| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | France | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | United States | 2 | |
| #5 | Belgium | 1 | |
| #6 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Organic fine chemistry | |
| #2 | Basic materials chemistry | |
| #3 | Machines | |
| #4 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Working-up pitch | |
| #2 | Preparation of materials | |
| #3 | Acyclic or carbocyclic compounds | |
| #4 | Separation | |
| #5 | Heterocyclic compounds |
| # | Name | Total Patents |
|---|---|---|
| #1 | Der Halden Claude Ab | 1 |
| #2 | Ab Der Halden Claude | 1 |
| #3 | Ab-Der-Halden Claude | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB2008020A | Process and installation for the solidification and granulatioj of pitches bitumes and the like | |
| US3597164A | Process and apparatus for the purification of crystallizable organic compounds | |
| US3331853A | Process for extracting anthracene and carbazol from crude anthracenic oils of coal tars |