Patent US3131388A successfully refreshed from Google Patents.
US3131388A
Expired / Lapsed
US
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Multiple amplifier circuit for proximity fuze
Assignee: Individual
•
Filing: 1950-11-17
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Granted: 1964-04-28
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Expires: 1970-11-17
Abstract
No abstract record available.
Inventors
- 👤 Ambrose D Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
IN A PROXIMITY FUZE, TWO INDEPENDENT AUDIO FREQUENCY ELECTRICALLY OPERATED AMPLIFIERS, SAID AMPLIFIERS BEING INDIVIDUALLY RESPONSIVE TO AUDIO FREQUENCY ELECTROMAGNETIC INPUT SIGNALS OF TWO NON-OVERLAPPING FREQUENCY RANGES, SAID AMPLIFIERS BEING CONNECTED JOINTLY TO ACTUATE THE FUZE BUT EACH INCLUDING OUTPUT LIMITING MEANS RENDERING IT INDIVIDUALLY INCAPABLE OF DELIVERING SUFFICIENT OUTPUT TO SO ACTUATE IT.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |