US2869676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-pneumatic tank switcher
Assignee: Shell Development Co
•
Filing: 1957-01-07
•
Granted: 1959-01-20
•
Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Edward B Lagucki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:40
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; 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)
US1118269A
Cited
US1286429A
Cited
DE827186C
Cited
US2605780A
Cited
US2698055A
Cited
US2779348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |