| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Germany | 3 | |
| #3 | Australia | 2 | |
| #4 | Brazil | 2 | |
| #5 | Canada | 2 | |
| #6 | France | 2 | |
| #7 | United Kingdom | 2 | |
| #8 | Netherlands | 2 | |
| #9 | Norway | 2 | |
| #10 | South Africa | 2 | |
| #11 | Switzerland | 1 | |
| #12 | Spain | 1 | |
| #13 | Israel | 1 | |
| #14 | Mexico | 1 | |
| #15 | New Zealand | 1 | |
| #16 | Philippines | 1 | |
| #17 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Lubricating compositions | |
| #2 | Liquid hydrocarbon mixture production | |
| #3 | Internal-combustion piston engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fletcher Laird C | 14 |
| #2 | O'Blasny Richard H | 13 |
| #3 | O'Blansy Richard H | 3 |
| #4 | Beard Harold J | 2 |
| #5 | Fletcher L C | 2 |
| #6 | O Blasny Richard H | 2 |
| #7 | O'Blasny R H | 1 |
| #8 | Blansy Richard H O | 1 |
| #9 | O'Blasny Richard | 1 |
| #10 | O Blansy Richard H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4504383A | Rerefining used oil with borohydride reducing agents | |
| DE3224235A1 | Process for the reprocessing of lubricant oil-containing used oil | |
| US4439311A | Rerefining used lubricating oil with hydride reducing agents | |
| US4399025A | Solvent extraction process for rerefining used lubricating oil | |
| US4302325A | Solvent extraction process for rerefining used lubricating oil | |
| US4360420A | Distillation and solvent extraction process for rerefining used lubricating oil | |
| US4342645A | Method of rerefining used lubricating oil |