US3436667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection circuit for an amplifier system
Assignee: ELECTRIC ASSOCIATES Inc
•
Filing: 1964-12-08
•
Granted: 1969-04-01
•
Expires: 1984-12-08
Abstract
No abstract record available.
Inventors
- 👤 Leonard Kedson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:57
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/083; H03F1/52; H03F3/00; H03F3/30; H03F3/3083; H03F3/3084; H03F3/38; H03F3/387
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |