US2656675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic control system for feedback turbines
Assignee: RTX Corp
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Filing: 1949-12-30
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Granted: 1953-10-27
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Richard J Coar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:49
CPC Classifications
F; F02; F02B; F02B37/00; F02B37/04; F02B37/10; F02B37/105; F02B39/00; F02B39/02; F02B39/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19009
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) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |