US2802574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal machine for extracting solids from liquids
Assignee: Hein Lehmann and Co AG
•
Filing: 1953-09-30
•
Granted: 1957-08-13
•
Expires: 1973-09-30
Abstract
No abstract record available.
Inventors
- 👤 Schweppe Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:23
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/08; B04B7/18; B04B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE221961C
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GB118262A
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US1569778A
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GB261851A
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US1839941A
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US2100117A
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US2422464A
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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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |