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US2657577A
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Apparatus for measuring the level of liquids
Assignee: Askania Werke AG
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Filing: 1949-11-25
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Granted: 1953-11-03
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Expires: 1969-11-25
Abstract
No abstract record available.
Inventors
- 👤 Falk Olaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/245
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US803029A
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US1571293A
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US2053938A
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GB409102A
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US2032016A
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US2101165A
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US2380436A
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US2423888A
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US2480490A
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US2483333A
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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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |