US2600612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft power control system
Assignee: Shell Development Co
•
Filing: 1946-10-12
•
Granted: 1952-06-17
•
Expires: 1966-10-12
Abstract
No abstract record available.
Inventors
- 👤 Francis G Bollo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:19
CPC Classifications
F; F02; F02D; F02D9/00; F02D29/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0233; F02D2700/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2195036A
Cited
US2322303A
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US2336844A
Cited
US2321381A
Cited
US2374276A
Cited
US2391323A
Cited
US2453651A
Cited
US2303998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |