Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE43044 | Electrically conductive pavement mixture | David J. Derwin, Walter H. Flood, Jr. | 2011-12-27 |
| 7666469 | Method of making graphite-coated particulate materials | Donald J. Weintritt, Henry Francois, Frank A. Wawrzos | 2010-02-23 |
| 7402338 | Graphite-coated particulate materials | Donald J. Weintritt, Henry Francois, Frank A. Wawrzos | 2008-07-22 |
| 6971819 | Electrically conductive pavement mixture | David J. Derwin, Walter H. Flood, Jr. | 2005-12-06 |
| 6756027 | Method of preparing graphite intercalation compounds and resultant products | Igor V. Barsukov | 2004-06-29 |
| 6660434 | Engineered carbonaceous materials and power sources using these materials | Igor V. Barsukov, David J. Derwin, Richard J. Girkant, Maritza Gallego | 2003-12-09 |
| 6350722 | High-temperature, water-based lubricant and process for making the same | Kenneth Skiles, Michael A. Castro | 2002-02-26 |
| 6287694 | Method for expanding lamellar forms of graphite and resultant product | David J. Derwin, Richard J. Girkant | 2001-09-11 |
| 6169059 | High-temperature, water-based lubricant and process for making the same | Kenneth Skiles, Michael A. Castro | 2001-01-02 |
| 5826669 | Drilling fluid loss prevention and lubrication additive | David J. Derwin, Donald J. Weintritt, George W. Russell | 1998-10-27 |
| 5707171 | Electrically conductive paving mixture and pavement system | David J. Derwin, Walter H. Flood, Jr. | 1998-01-13 |
| 4634545 | Railroad track lubricant | Stanley H. Gratt | 1987-01-06 |