Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865741 | Separation of oil into fractions of asphaltenes, resins, aromatics, and saturated hydrocarbons | Edwin L. Collings, Jr. | 1989-09-12 |
DN
David G. Nolte
Overall (1989): #122,188 of 140,708Top 90%
1
Patents 1989