| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | France | 2 | |
| #3 | Norway | 2 | |
| #4 | United States | 2 | |
| #5 | Canada | 1 | |
| #6 | Denmark | 1 | |
| #7 | EPO (European Patent Office) | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Italy | 1 | |
| #10 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Civil engineering | |
| #3 | Chemical engineering | |
| #4 | Materials and metallurgy | |
| #5 | Machines | |
| #6 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barthel Horst K F | 3 |
| #2 | Barthel Horst | 3 |
| #3 | Barthel H K F | 2 |
| #4 | Barthel H | 1 |
| #5 | Barthel Horst Karl Ferdinand | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4222988A | Apparatus for removing hydrocarbons from drill cuttings | |
| GB1490317A | Aqueous drilling fluid and a method increasing its drilling lubricity | |
| DE2158669A1 | Prevention of oil spillages - from damaged tankers by pumping in metal soap gelling agents | |
| DE2140618A1 | UNDERGROUND SEALING PROCEDURE | |
| DE2134722A1 | Magnesia cement - contg ammonium salt, for reinforcing and sealing borings, giving slower hardening and resistance to magnesium |