US3631030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of epsilon-caprolactam
Assignee: BASF SE
•
Filing: 1970-01-06
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Granted: 1971-12-28
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Expires: 1990-01-06
Abstract
Abstract PRODUCTION OF CAPROLACTAM BY CATALYTIC REARRANGEMENT OF CYCLOHEXANONE OXIME IN THE VAPOR PHASE IN CONTACT WITH BORIC OXIDE CATALYSTS ON ALUMINA WHICH CONTAIN FROM 0.1 TO 10% BY WEIGHT OF MANGANESE, NICKEL AND/OR COBALT OR AS THE SALTS OXIDES OF SUCH METALS. CAPROLACTAM IS USEFUL FOR THE PRODUCTION OF NYLON 6 WHICH IS A FIBER INTERMEDIATE.
Inventors
- 👤 Karl-Siegfried Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:07
CPC Classifications
C; C07; C07D; C07D201/00; C07D201/02; C07D201/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |