US2667150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control method and apparatus
Assignee: RTX Corp
•
Filing: 1947-05-21
•
Granted: 1954-01-26
•
Expires: 1967-05-21
Abstract
No abstract record available.
Inventors
- 👤 Richard J Coar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
F; F02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0246; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2365
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2422162A
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US2575345A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-25 | 1957-07-27 | 1958-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-25 | 1961-07-27 | 1962-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-25 | 1965-07-27 | 1966-01-26 | $7700.00 | Window Closed / Lapsed |