US2649771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level control apparatus
Assignee: Delaware Capital Formation Inc
•
Filing: 1949-07-16
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Granted: 1953-08-25
•
Expires: 1969-07-16
Abstract
No abstract record available.
Inventors
- 👤 Parks Asbury Sloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:04
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/02; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7358; Y10T137/7368; Y10T137/7371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992212A
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FR806889A
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US2123652A
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US2269846A
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US2248322A
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FR872258A
Cited
US2263771A
Cited
US2416570A
Cited
US2476030A
Cited
US2459527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |