Nicolaas F. Haasen
12Patents
5h-index
18Co-inventors
63Inventor score
Filing activity: Dec 27, 1977 → Aug 23, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5700934A | Process for the preparation of epsilon-caprolactam and epsilon-caprolactam precursors | Chemistry; Metallurgy | 54 | Expired |
| US4457807A | Process for the purification of .epsilon.-caprolactam | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5495041A | Process for the preparation of a pentenoate ester | Chemistry; Metallurgy | 14 | Expired |
| US4563308A | Recovery of caprolactam from caprolactam-containing distillation residue | Chemistry; Metallurgy | 11 | Expired |
| US5717089A | Process for the preparation of E-caprolactam | Chemistry; Metallurgy | 8 | Expired |
| US6323341A | Process for the continuous purification of crude .epsilon.-caprolactam | Chemistry; Metallurgy | 4 | Expired |
| US4122153A | Recycling method for the preparation and processing of a hydroxyl ammonium salt solution | Chemistry; Metallurgy | 3 | Expired |
| US5585524A | Method for the preparation of an aldehyde | Emerging Cross-Sectional Technologies | 2 | Expired |
| US6828413B2 | Process for the preparation of a polyamide | Chemistry; Metallurgy | 1 | Expired |
| US6392037B1 | Process for the preparation of &egr;-caprolactam | Chemistry; Metallurgy | 1 | Expired |
| US6706153B2 | Process for the separation of a ketoxime or aldoxime from an amide | Chemistry; Metallurgy | 1 | Expired |
| US7615137B2 | Process for recovering caprolactam from aqueous caprolactam product using in situ prepared alkali amino caproate | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.