US2493911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation by adsorption
Assignee: Pan American Refining Corp
•
Filing: 1944-11-30
•
Granted: 1950-01-10
•
Expires: 1964-11-30
Abstract
No abstract record available.
Inventors
- 👤 Preston L Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/06; B01D53/10; B01D53/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1422007A
Cited
US1577534A
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US1784536A
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US2127993A
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US2180386A
Cited
US2270903A
Cited
US2256940A
Cited
US2311564A
Cited
US2302209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |