Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835307 | Method and apparatus for controlling the manufacture of terephthalic acid to control the level and variability of the contaminant content and the optical density | Harold A. Lindahl, Kenneth J. Abrams, Martin A. Zeitlin | 1989-05-30 |