Ritchie; Andrew J. D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ritchie; Andrew J. D..The latest application filed is for "lubricating oil compositions".
- Ritchie; Andrew J. D. - Chatham NJ
| Patent | Date |
|---|---|
| Lubricating oil compositions Grant 11,034,912 - Ritchie , et al. June 15, 2 | 2021-06-15 |
| Lubricating Oil Compositions App 20150307802 - Ritchie; Andrew J. D. ; et al. | 2015-10-29 |
| Lubricating oil compositions Grant 7,018,958 - Arrowsmith , et al. March 28, 2 | 2006-03-28 |
| Lubricating oil compositions App 20050124509 - Gutierrez, Antonio ; et al. | 2005-06-09 |
| Lubricating oil compositions App 20050119138 - Ritchie, Andrew J.D. ; et al. | 2005-06-02 |
| Lubricating oil compositions Grant 6,869,919 - Ritchie , et al. March 22, 2 | 2005-03-22 |
| Lubricating oil compositions App 20040077506 - Arrowsmith, Stephen ; et al. | 2004-04-22 |
| EGR equipped diesel engines and lubricating oil compositions Grant 6,715,473 - Ritchie , et al. April 6, 2 | 2004-04-06 |
| Lubricating oil compositions App 20040048753 - Ritchie, Andrew J.D. ; et al. | 2004-03-11 |
| Egr Equipped Diesel Engines And Lubricating Oil Compositions App 20040025853 - Ritchie, Andrew J. D. ; et al. | 2004-02-12 |
| High molecular weight dispersant compositions and their preparation Grant 6,310,010 - Higton , et al. October 30, 2 | 2001-10-30 |
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