Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5011999 | Process of preparing non-cyclic polyalkylenepolyamines employing group VB metal catalysts | Robert G. Bowman, George E. Hartwell, David C. Molzahn, John E. Lastovica, Jr. | 1991-04-30 |
| 4737243 | Method for decoloration of triethylenetetramine (TETA) | Robert J. Siml, Clara S. Dannhaus | 1988-04-12 |
| 4477591 | Method for preparing a catalyst for the dehydration of an alkanolamine | — | 1984-10-16 |
| 4376732 | Niobium or tantalum catalysts for the preparation of ethylenimine | — | 1983-03-15 |
| 4337175 | Catalyst for the preparation of ethylenimine | — | 1982-06-29 |