Patent US2605780A successfully refreshed from Google Patents.
US2605780A
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Automatic tank switcher
Assignee: Shell Development Co
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Filing: 1949-12-13
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Granted: 1952-08-05
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Expires: 1969-12-13
Abstract
No abstract record available.
Inventors
- 👤 William T Nance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:20
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/78; F; F16; F16K; F16K31/00; F16K31/02; B67D2210/00; B67D2210/00028; B67D2210/00047; B67D2210/0006; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T137/2668; Y10T137/2673; Y10T137/2675
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) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |