Patent US820283A successfully refreshed from Google Patents.
US820283A
Expired / Lapsed
US
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Process and apparatus for separating mixed gases.
Assignee: Individual
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Filing: 1905-08-31
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Granted: 1906-05-08
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Expires: 1925-08-31
Abstract
No abstract record available.
Inventors
- 👤 Charles Clamond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:17
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22
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) | 1909-05-07 | 1909-11-06 | 1910-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-05-07 | 1913-11-06 | 1914-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-05-07 | 1917-11-06 | 1918-05-08 | $7700.00 | Window Closed / Lapsed |