Patent US2800138A successfully refreshed from Google Patents.
US2800138A
Expired / Lapsed
US
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Automatic tank switching system and apparatus therefor
Assignee: US Industries Inc
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Filing: 1955-07-26
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Granted: 1957-07-23
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Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 Clifford M Peters
- 👤 Vernon B Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:07
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; F16K31/128; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2673; Y10T137/2675; Y10T137/7722; Y10T137/7758
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2168254A
Cited
US2399938A
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US2619105A
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US2572621A
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US2605780A
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US2729232A
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US2729227A
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US2751924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |