US1680840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating and recovering gases
Assignee: AMERICAN SOLVENT RECOVERY Corp
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Filing: 1920-07-20
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Granted: 1928-08-14
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Expires: 1940-07-20
Abstract
No abstract record available.
Inventors
- 👤 Oscar L Barnebey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:14
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0423; B01D53/0438; B01D53/0454; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/20; B01D2257/206; B01D2257/2064; B01D2257/30; B01D2257/302; B01D2257/70; B01D2257/702; B01D2257/7022; B01D2257/7027; B01D2257/704; B01D2257/708; B01D2257/80; B01D2259/00; B01D2259/40; B01D2259/40003; B01D2259/40083; B01D2259/40088; B01D2259/4009; B01D2259/41; B01D53/0446; B01D53/26; B01D53/261
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) | 1931-08-14 | 1932-02-13 | 1932-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-08-14 | 1936-02-13 | 1936-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-08-14 | 1940-02-13 | 1940-08-14 | $7700.00 | Window Closed / Lapsed |