| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 3 | |
| #2 | Australia | 1 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Malaysia | 1 | |
| #7 | Norway | 1 | |
| #8 | Tunisia | 1 | |
| #9 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Materials for miscellaneous applications | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walker Thad O | 10 |
| #2 | Dearing Harry L | 1 |
| #3 | Simpson Jay P | 1 |
| #4 | Thad O Walker | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5710107A | Environmentally safe drilling fluid | |
| US5403820A | Environmentally safe water base drilling fluid | |
| US4508628A | Fast drilling invert emulsion drilling fluids |