US2963219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for continuous operation of series connected hermetically closed centrifugal separators
Assignee: Alfa Laval Holdings Amsterdam AB
•
Filing: 1957-04-22
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Granted: 1960-12-06
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Expires: 1977-04-22
Abstract
No abstract record available.
Inventors
- 👤 Palmqvist Fredrik Teod Emanuel
- 👤 Hoffmann Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:02
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/16; B; B01; B01D; B01D11/00; B01D11/04; B04; B04B; B04B11/00; B04B11/02; B04B5/00; B04B5/10; C11B3/02; C11B3/06; C11D; C11D13/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB279330A
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US1988164A
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US2223623A
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US2227837A
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GB497543A
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US2300750A
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US2346005A
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US2294609A
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US2445544A
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US2502349A
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US2539915A
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US2663718A
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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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |