Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7615137 | Process for recovering caprolactam from aqueous caprolactam product using in situ prepared alkali amino caproate | Nicolaas F. Haasen, Gerardus Hangx | 2009-11-10 |
| 4563308 | Recovery of caprolactam from caprolactam-containing distillation residue | Otto G. Plantema, Nicolaas F. Haasen | 1986-01-07 |
| 4384125 | Process for the purification of 2-pyrrolidone | Reijer Goettsch | 1983-05-17 |
| 4216151 | Process for the recovery of 2-pyrrolidone | Reijer Goettsch | 1980-08-05 |