Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5316654 | Processes for the manufacture of enriched pitches and carbon fibers | Donald C. Berkebile, deceased, Catherine Berkebile, Administratrix, Donald M. Lee, Joseph Lauer, Roy E. Booth +2 more | 1994-05-31 |
| 4996037 | Processes for the manufacture of enriched pitches and carbon fibers | Donald C. Berkebile, deceased, Donald M. Lee, Joseph Lauer, Roy E. Booth, William P. Hettinger, Jr. | 1991-02-26 |
| 4816195 | Process of making a loosely formed non-woven mat of aligned carbon fibers | William P. Hettinger, Jr. | 1989-03-28 |
| 4750964 | Rotating drum accumulator for semi-aligned carbon fibers and process of manufacturing same | William P. Hettinger, Jr. | 1988-06-14 |