Patent US2521794A successfully refreshed from Google Patents.
US2521794A
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US
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Liquid level metering mechanism
Assignee: Globe American Corp
•
Filing: 1946-01-19
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Granted: 1950-09-12
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Expires: 1966-01-19
Abstract
No abstract record available.
Inventors
- 👤 Harvey William Dow
- 👤 Donald B Tolley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:11
CPC Classifications
F; F04; F04B; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B49/00; F04B49/12; G; G03; G03D; G03D3/00; G03D3/02; G03D3/06; G03D7/00; G05; G05D; G05D9/00; G05D9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1040528A
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US1875032A
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US2068138A
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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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |