Patent US3621784A successfully refreshed from Google Patents.
US3621784A
Expired / Lapsed
US
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Optical system for an infrared missile fuze
Assignee: United States Department of the Navy
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Filing: 1955-12-29
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Granted: 1971-11-23
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Expires: 1975-12-29
Abstract
Abstract 1. AN INFRARED FUZE COMPRISING AN ANNULAR TOROIDAL LENS, A PAIR OF ANNULAR DETECTORS POSITIONED CONCENTRICALLY WITH RESPECT TO THE AXIS OF SAID LENS AND ON OPPOSITE SIDES OF THE FOCAL POINT OF SAID LENS, SHIELDING AN REFLECTING MEANS ASSOCIATED WITH ONE OF SAID DETECTORS WHEREBY THE ENERGY PASSING THROUGH SAID LENS CROSSES THE AXIS THEREOF BEFORE STRIKING SAID DETECTOR, AND ELECTRONIC MEANS ASSOCIATED WITH SAID DETECTORS AND ADAPTED TO RECEIVE SUCCESSIVE SIGNALS FROM SAID DETECTORS DURING A PREDETERMINED INTERVAL FOR ACTUATING A DETONATION CIRCUIT.
Inventors
- 👤 Lloyd G Mundie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:37
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |