Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861436 | Recovery of 4-methyl-2-pentanone from acetic acid by distillation | Lloyd Berg, Marc W. Paffhausen | 1989-08-29 |
| 4840707 | Separation of 3-methyl-2-butanone from formic acid by extractive distillation | Lloyd Berg | 1989-06-20 |