US2950778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the separation of mixtures in the gaseous state
Assignee: Evonik Operations GmbH
•
Filing: 1956-10-05
•
Granted: 1960-08-30
•
Expires: 1976-10-05
Abstract
No abstract record available.
Inventors
- 👤 Boettcher Alfred
- 👤 Manteufel Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:30
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/10; B01D59/18; B01D45/00; B01D45/04; B01D45/06; B01D53/00; B01D53/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2583601A
Cited
US2607439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-30 | 1964-02-29 | 1964-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-30 | 1968-02-29 | 1968-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-30 | 1972-02-29 | 1972-08-30 | $7700.00 | Window Closed / Lapsed |