US2759557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow control means for separation apparatus
Assignee: Individual
•
Filing: 1952-06-11
•
Granted: 1956-08-21
•
Expires: 1972-06-11
Abstract
No abstract record available.
Inventors
- 👤 Gordon Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:55
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/14; E03F5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US952620A
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US1648708A
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US1883720A
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US2118157A
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US2201282A
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US2216300A
Cited
US2369194A
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US2479386A
Cited
US2464976A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |