Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4904367 | Removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range | Donald B. Trust | 1990-02-27 |
| 4820400 | Process for removing haze from dewaxed hydrocarbon oil mixture boiling in the lubricating oil range (OP-3379) | Donald B. Trust, Rudolph R. Savory | 1989-04-11 |
| 4702817 | Removing haze from hydrocarbon oil mixture boiling in the lubricating oil range | Steven Ackerman | 1987-10-27 |
| 4629546 | Method and apparatus for centrifugal separation of dispersed phase from a continuous liquid phase | — | 1986-12-16 |
| 4627901 | Separating wax from hydrocarbon mixture boiling in the lubricating oil range | Anthony E. Cerkanowicz, Robert J. L. Chimenti, Donald J. Mintz | 1986-12-09 |
| 4622118 | Method and apparatus for separating wax/water from hydrocarbon oil mixture boiling in the lubricating oil range | Robert J. L. Chimenti, Anthony E. Cerkanowicz | 1986-11-11 |
| 4512878 | Used oil re-refining | Lloyd E. Reid, Keith C. Yao | 1985-04-23 |
| 4490240 | Removal of corrodants from NMP solvent by contacting with sacrificial metal | Roy V. Comeaux, Milton D. Leighton | 1984-12-25 |
| 4346008 | Rotary drum filter | Milton D. Leighton | 1982-08-24 |
| 4314886 | Mechanically agitated liquid-vapor contacting apparatus | — | 1982-02-09 |
| 4309288 | Rotary drum filter | Derek J. Watridge | 1982-01-05 |
| 4217203 | Continuous autorefrigerative dewaxing process and apparatus | — | 1980-08-12 |
| 4216075 | Combination dewaxing process | — | 1980-08-05 |