Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5078240 | Adjustable vibration damper with valve body in piston having directional flow control | Norbert Ackermann | 1992-01-07 |
| 4993693 | Self-pumping hydropneumatic shock absorbing leg with internal level regulation | Karl-Heinz Lohr, Ewald Kohberg, Norbert Sommer | 1991-02-19 |
| 4723640 | Adjustable hydraulic vibration damper | — | 1988-02-09 |
| 4650042 | Hydraulic adjustable shock absorber | Heinz Knecht, Alfred Preukschat | 1987-03-17 |
| 4612298 | Carbo-metallic oil conversion catalysts | William P. Hettinger, Jr. | 1986-09-16 |
| 4552647 | Process for cracking high-boiling hydrocarbons using continuous addition of acidity enhancing additives | William P. Hettinger, Jr., Stephen M. Kovach | 1985-11-12 |
| 4515900 | Sorbent useful in a visbreaking treatment of carbo-metallic oils | William P. Hettinger, Jr. | 1985-05-07 |
| 4508839 | Catalyst for the conversion of carbo-metallic containing oils | Oliver J. Zandona, William P. Hettinger, Jr., Stephen M. Kovach | 1985-04-02 |
| 4496665 | Process for cracking high-boiling hydrocarbons using continuous addition of acidity enhancing additives | William P. Hettinger, Jr., Stephen M. Kovach | 1985-01-29 |
| 4469588 | Immobilization of vanadia deposited on sorbent materials during visbreaking treatment of carbo-metallic oils | William P. Hettinger, Jr. | 1984-09-04 |
| 4457833 | Process and catalyst for the conversion of carbo-metallic containing oils | Oliver J. Zandona, William P. Hettinger, Jr., Stephen M. Kovach | 1984-07-03 |
| 4440868 | Carbo-metallic oil conversion catalysts | William P. Hettinger, Jr., Stephan M. Kovach | 1984-04-03 |