| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 2 | |
| #2 | Argentina | 1 | |
| #3 | Australia | 1 | |
| #4 | Brazil | 1 | |
| #5 | Canada | 1 | |
| #6 | China | 1 | |
| #7 | Colombia | 1 | |
| #8 | EPO (European Patent Office) | 1 | |
| #9 | Hong Kong | 1 | |
| #10 | India | 1 | |
| #11 | Mexico | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 | |
| #13 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Materials for miscellaneous applications | |
| #2 | Building materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hall David Glenn | 11 |
| #2 | Watkins Richard F | 11 |
| #3 | Davis Gary J | 11 |
| #4 | Geary Bryan Dell | 11 |
| #5 | Sorrell Carlton Frazier | 10 |
| #6 | David Glenn Hall | 2 |
| #7 | Gary J Davis | 2 |
| #8 | Richard F Watkins | 2 |
| #9 | Bryan Dell Geary | 2 |
| #10 | Carlton Frazier Sorrell | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2013345100A1 | Spherical pellets containing common clay particulate material useful as a proppant in hydraulic fracturing of oil and gas wells |