US2821674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control circuits
Assignee: Raytheon Co
•
Filing: 1954-07-08
•
Granted: 1958-01-28
•
Expires: 1974-07-08
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:16
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2450084A
Cited
US2508082A
Cited
US2519043A
Cited
US2677796A
Cited
US2653282A
Cited
US2683843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |