Patent US2685370A successfully refreshed from Google Patents.
US2685370A
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Centrifugal machine for continuous operation
Assignee: Sulzer Escher Wyss AG
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Filing: 1951-08-20
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Granted: 1954-08-03
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Expires: 1971-08-20
Abstract
No abstract record available.
Inventors
- 👤 Ruegg Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:33
CPC Classifications
B; B04; B04B; B04B3/00; B04B3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB494409A
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US2232768A
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US2232769A
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US2232770A
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US2472425A
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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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |