US3408575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiving apparatus using hall effect feedback control
Assignee: Westinghouse Electric Corp
•
Filing: 1965-04-23
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Granted: 1968-10-29
•
Expires: 1985-04-23
Abstract
No abstract record available.
Inventors
- 👤 Edward A Petrocelli
- 👤 Lin Hung Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
H; H04; H04R; H04R3/00; H04R3/002; H03; H03F; H03F1/00; H03F1/34; H03F1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2538772A
Cited
US2988650A
Cited
US3009991A
Cited
US2948778A
Cited
US3066187A
Cited
US3178696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |