Patents per Year
Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4957174 | Method of controlling lost circulation in well drilling | Donald L. Whitfill, Edwin Kubena, Jr., Terry S. Cantu | 1990-09-18 | |
| 4473464 | Method for producing distillable hydrocarbonaceous fuels and carbonaceous agglomerates from a heavy crude oil | Lyndon D. Boyer, Francis E. Sage | 1984-09-25 | |
| 4388152 | Process for producing blast furnace grade coke, a distillable product and fuel gases from a heavy, high sulfur, crude oil | George E. Wasson, Frank W. Theodore, Lyndon D. Boyer | 1983-06-14 | |
| 4385980 | Coal treating process | — | 1983-05-31 | |
| 4292165 | Processing high sulfur coal | — | 1981-09-29 | $28,209,000 |
| 4213846 | Delayed coking process with hydrotreated recycle | Lloyd G. Becraft, William H. Kegler | 1980-07-22 | $10,997,000 |