US2047550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of copper ammonia solutions used to absorb carbon oxides and oxygen
Assignee: Chemical Construction Corp
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Filing: 1933-03-07
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Granted: 1936-07-14
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Expires: 1953-03-07
Abstract
No abstract record available.
Inventors
- 👤 Josef G Dely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/62; C; C01; C01B; C01B3/00; C01B3/02; C01B3/025; C01B3/50; C01B3/52; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C01B2203/00; C01B2203/04; C01B2203/0415; C01B2203/0465; C01B2203/047; C01B2203/0475; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02C; Y02C20/00; Y02C20/40; Y02P; Y02P20/00; Y02P20/151
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) | 1939-07-14 | 1940-01-13 | 1940-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-14 | 1944-01-13 | 1944-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-14 | 1948-01-13 | 1948-07-14 | $7700.00 | Window Closed / Lapsed |