US3579558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of omega-aminoalkane nitriles
Assignee: Bayer AG
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Filing: 1968-09-25
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Granted: 1971-05-18
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Expires: 1988-09-25
Abstract
Abstract PROCESS OF PRODUCING W-AMINOALKANE NITRILES BY HEATING CORRESPONDING LACTAMS WITH A STOICHIOMETRIC EXCESS OF AMMONIA IN THE GASEOUS PHASE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A SOLID CATALYST, SAID CATALYST CONSISTING ESSENTIALLY OF MAGNESIUM SILICATE, CALCIUM SILICATE, ZINC SILICATE, ALUMINUM SILICATE, MANAGANESE SILICATE, IRON SILICATE, FLUORINATED ALUMINUM OXIDE, FLUORINATED MAGNESIUM SILICATE, FLUORINATED CALCIUM SILICATE, FLUORINATED ZINC SILICATE, FLUORINATED ALUMINUM SILICATE, FLUORINATED MANGANESE SILICATE OR FLUORINATED IRON SILICATE.
Inventors
- 👤 Otto Immel
- 👤 Hans-Helmut Schwarz
- 👤 Hermann Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:14
CPC Classifications
C; C07; C07C; C07C255/00
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |