Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5352289 | Low ash carbon blacks | Frank J. Hrach, Jr., Chung-Huei Shieh, William L. Sifleet, Jay J. Zimmer | 1994-10-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5352289 | Low ash carbon blacks | Frank J. Hrach, Jr., Chung-Huei Shieh, William L. Sifleet, Jay J. Zimmer | 1994-10-04 |