US2941712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal separation system with emergency control
Assignee: De Laval Separator Co
•
Filing: 1955-03-25
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Granted: 1960-06-21
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Expires: 1975-03-25
Abstract
No abstract record available.
Inventors
- 👤 Cook James Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
B; B04; B04B; B04B11/00; B04B11/02; H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; Y; Y10; Y10S; Y10S494/00; Y10S494/901; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7303; Y10T137/7358; Y10T137/742; Y10T137/8158; Y10T137/8359
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |