Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5849676 | Post-treated derivatives of polyalkylene succinimides | William R. Ruhe, Jr. | 1998-12-15 |
| 5821205 | Polyalkylene succinimides and post-treated derivatives thereof | William R. Ruhe, Jr. | 1998-10-13 |
| 5792729 | Dispersant terpolymers | William R. Ruhe, Jr. | 1998-08-11 |
| 5753597 | Polymeric dispersants | William R. Ruhe, Jr. | 1998-05-19 |
| 5716912 | Polyalkylene succinimides and post-treated derivatives thereof | William R. Ruhe, Jr. | 1998-02-10 |
| 5625004 | Two-step thermal process for the preparation of alkenyl succinic anhydride | William R. Ruhe, Jr. | 1997-04-29 |
| 5616668 | Polymeric dispersants having polyalkylene and succinic groups | William R. Ruhe, Jr. | 1997-04-01 |
| 5565528 | Polymeric dispersants having polyalkylene and succinic groups | William R. Ruhe, Jr. | 1996-10-15 |
| 5356552 | Chlorine-free lubricating oils having modified high molecular weight succinimides | William R. Ruhe, Jr., Jack E. Morris, Jacques Cazin | 1994-10-18 |
| 5334321 | Modified high molecular weight succinimides | William R. Ruhe, Jr. | 1994-08-02 |
| 5319030 | One-step process for the preparation of alkenyl succinic anhydride | William R. Ruhe, Jr. | 1994-06-07 |
| 5286799 | Two-step free radical catalyzed process for the preparation of alkenyl succinic anhydride | William R. Ruhe, Jr. | 1994-02-15 |
| 5232616 | Lubricating compositions | Curtis B. Campbell | 1993-08-03 |
| 5112507 | Polymeric dispersants having alternating polyalkylene and succinic groups | — | 1992-05-12 |
| 4529554 | Process for the preparation of nickel ylides containing ylide ligands with a sulfonated group V component | David L. Beach | 1985-07-16 |
| 4507247 | Sulfonated Group Va ylides and process for preparing same | David L. Beach | 1985-03-26 |
| 4418228 | Process for ring bromination of nitrobenzene | John P. Pellegrini, Jr., Charles M. Selwitz | 1983-11-29 |
| 4394322 | Group VA ylides and process for preparing same | David L. Beach | 1983-07-19 |
| 4382153 | Process for the oligomerization of ethylene in methanol | David L. Beach | 1983-05-03 |
| 4377528 | Group VA salts and process for preparing same | David L. Beach | 1983-03-22 |
| 4356325 | Process for preparation of acetylene terminated sulfones, oligomers and precursors therefor | Edward T. Sabourin, Charles M. Selwitz | 1982-10-26 |
| 4310716 | Process for the oligomerization of ethylene in methanol | David L. Beach | 1982-01-12 |
| 4301318 | Process for recovering oligomerization product | David L. Beach | 1981-11-17 |
| 4293502 | Nickel ylides | David L. Beach | 1981-10-06 |
| 4293727 | Process for the oligomerization of ethylene | David L. Beach | 1981-10-06 |