| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Brazil | 2 | |
| #2 | France | 2 | |
| #3 | Italy | 2 | |
| #4 | Argentina | 1 | |
| #5 | Germany | 1 | |
| #6 | Spain | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | India | 1 | |
| #9 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Organic fine chemistry | |
| #2 | Basic materials chemistry |
| # | Technology | |
|---|---|---|
| #1 | Acyclic or carbocyclic compounds | |
| #2 | Liquid hydrocarbon mixture production |
| # | Name | Total Patents |
|---|---|---|
| #1 | Davidsohn A | 3 |
| #2 | Davidsohn Alfred | 2 |
| #3 | Davidson Alfred | 1 |
| #4 | Davidsohn Alfred S | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3935237A | Method of sulfonation of aromatic hydrocarbons with minimized by-product formation |