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Patent US2641034A successfully refreshed from Google Patents.
US2641034A
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US
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Method of and apparatus for indicating and/or controlling the level of liquid within an opaque container
Assignee: Babcock and Wilcox Co
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Filing: 1949-01-29
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Granted: 1953-06-09
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Expires: 1969-01-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Isaac Harter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:03
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/284; G01F23/288; B; B22; B22D; B22D11/00; B22D11/16; B22D11/20; B22D11/201; B22D11/206; G05; G05D; G05D9/00; G05D9/12
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) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |