US2661094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable volume separator for liquids
Assignee: Shell Development Co
•
Filing: 1950-10-03
•
Granted: 1953-12-01
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Expires: 1970-10-03
Abstract
No abstract record available.
Inventors
- 👤 William B Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:15
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/0208; B01D17/0214; Y; Y10; Y10S; Y10S210/00; Y10S210/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2003819A
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US2222595A
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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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |