US2491060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery and cleaning of condensable gases
Assignee: French Oil Mill Machinery Co
•
Filing: 1946-03-12
•
Granted: 1949-12-13
•
Expires: 1966-03-12
Abstract
No abstract record available.
Inventors
- 👤 Harry S Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:58
CPC Classifications
C; C11; C11B; C11B1/00; C11B1/10; C11B1/108; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0226; B01D11/028; B01D47/00; B01D47/06; B01D5/00; B01D5/0033; B01D5/0036; B01D5/0057
Claims Analysis
Total Claims: 0
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US2321893A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |