US3386804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating ammonia from nitriles
Assignee: Evonik Operations GmbH
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Filing: 1966-08-25
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Granted: 1968-06-04
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Expires: 1986-08-25
Abstract
No abstract record available.
Inventors
- 👤 Neugebauer Walter
- 👤 Schmidt Lothar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:16
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; C07; C07C; C07C253/00; C07C253/32; C07C253/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA701001A
Cited
US3255233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |