US2647173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple feedback system
Assignee: General Electric Co
•
Filing: 1948-10-28
•
Granted: 1953-07-28
•
Expires: 1968-10-28
Abstract
No abstract record available.
Inventors
- 👤 Charles A E Beurtheret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; Y; Y10; Y10S; Y10S84/00; Y10S84/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1843288A
Cited
US2162744A
Cited
US2172453A
Cited
US2253976A
Cited
US2244249A
Cited
GB550171A
Cited
US2480163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |