Keller, Jr.; Douglas V.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Keller, Jr.; Douglas V..The latest application filed is for "leak detection with non-toxic liquids".
- Keller, Jr.; Douglas V. - Lafayette NY
| Patent | Date |
|---|---|
| Leak detection with non-toxic liquids Grant 5,589,631 - Spring , et al. December 31, 1 | 1996-12-31 |
| Coal compositions Grant 4,515,602 - Keller, Jr. , et al. May 7, 1 | 1985-05-07 |
| Methods of cleaning coal Grant 4,461,625 - Smith , et al. July 24, 1 | 1984-07-24 |
| Multi-phase separation methods and apparatus Grant 4,294,695 - Smith , et al. October 13, 1 | 1981-10-13 |
| Coal beneficiation processes Grant 4,252,639 - Smith , et al. February 24, 1 | 1981-02-24 |
| Coal recovery processes utilizing agglomeration and density differential separations Grant 4,249,699 - Smith , et al. February 10, 1 | 1981-02-10 |
| Coal recovery process Grant 4,248,698 - Keller, Jr. February 3, 1 | 1981-02-03 |
| Treating and cleaning coal methods Grant 4,244,699 - Smith , et al. January 13, 1 | 1981-01-13 |
| Methods of and apparatus for mining and processing tar sands and the like Grant 4,234,232 - Smith , et al. November 18, 1 | 1980-11-18 |
| Method and apparatus for coal separation using fluorinated hydrocarbons Grant 4,178,231 - Smith , et al. December 11, 1 | 1979-12-11 |
| Fluorinated hydrocarbons in coal mining and beneficiation Grant 4,178,233 - Smith , et al. December 11, 1 | 1979-12-11 |
| Multi-phase separation methods and apparatus Grant 4,055,480 - Smith , et al. October 25, 1 | 1977-10-25 |
| Chemical Comminution And Mining Of Coal Grant 3,850,477 - Aldrich , et al. November 26, 1 | 1974-11-26 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 