US2011386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of weak gaseous acids from gases
Assignee: IG Farbenindustrie AG
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Filing: 1934-03-23
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Granted: 1935-08-13
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Expires: 1954-03-23
Abstract
No abstract record available.
Inventors
- 👤 Uirich Heinrich
- 👤 Dehnert Heinrich
- 👤 Fries Friedrich August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:35
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/62; B01D53/48; B01D53/52; B01D53/526; C; C01; C01B; C01B17/00; C01B17/16; C01B17/167; C01B32/00; C01B32/50; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/14; C10K1/143
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) | 1938-08-12 | 1939-02-11 | 1939-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-12 | 1943-02-11 | 1943-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-12 | 1947-02-11 | 1947-08-13 | $7700.00 | Window Closed / Lapsed |