Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274662 | Vulcanizable elastomeric compositions containing surface treated barium sulfate and vulcanizates thereof | Thomas J. Lynch, Gary M. Freeman | 2001-08-14 |
| 5906843 | Amorphous precipitated silica having large liquid carrying capacity | James T. Dew, Diana L. Scott, Walter H. Waddell | 1999-05-25 |
| 5891949 | Natural rubber compound | William C. Fultz | 1999-04-06 |
| 5610221 | Tire tread composition comprising highly reinforcing reinforced amorphous precipitated silica | Walter H. Waddell, Thomas G. Krivak | 1997-03-11 |
| 5605950 | Tire tread composition comprising highly reinforcing reinforced amorphous precipitated silica | Walter H. Waddell, Thomas G. Krivak | 1997-02-25 |
| 5426136 | Particulate amorphous silica associated with thin polymeric film | Walter H. Waddell, Jeffrey H. Harwell, John H. O'Haver | 1995-06-20 |
| 5353999 | Particulate amorphous precipitated silica | James T. Dew, Walter H. Waddell | 1994-10-11 |
| 5023287 | Rubber containing matrix-antidegradants | Walter H. Waddell, Frank W. Harris, David Andrew Benko | 1991-06-11 |
| 4895884 | Rubber containing microencapsulated antidegradants | David Andrew Benko, James Gregory Gillick, Walter H. Waddell, Barbara A. Metz, Benjamin F. Benton +2 more | 1990-01-23 |