US2946402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering hydrocyanic acid from gas mixtures containing the same
Assignee: Dr C Otto and Co GmbH
•
Filing: 1957-05-28
•
Granted: 1960-07-26
•
Expires: 1977-05-28
Abstract
No abstract record available.
Inventors
- 👤 Erich H Becker-Boost
- 👤 Kronacher Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:37
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/02; C01C3/04; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/342; C01B32/348; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-26 | 1964-01-25 | 1964-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-26 | 1968-01-25 | 1968-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-26 | 1972-01-25 | 1972-07-26 | $7700.00 | Window Closed / Lapsed |