US3160751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for identifying and tracking source of infrared radiation emission
Assignee: Aerojet Rocketdyne Inc
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Filing: 1961-06-05
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Granted: 1964-12-08
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Expires: 1981-06-05
Abstract
No abstract record available.
Inventors
- 👤 Charles E Dunning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:34
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/78; G01S3/782; G01S3/789
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN AN INFRARED OPTICAL SYSTEM, A FILTER ELEMENT AT LEAST CLOSELY ADJACENT THE ENTRANCE APERTURE OF THE OPTICAL SYSTEM, SAID FILTER ELEMENT HAVING A PLURALITY OF SEPARATE PORTIONS, EACH PORTION CAPABLE OF TRANSMITTING SUBSTANTIALLY A SINGLE NARROW FREQUENCY BAND, SAID PORTIONS OF THE FILTER ELEMENT SEPARATING THE NARROW FREQUENCY BANDS FROM EACH OTHER IN THE OPTICAL SYSTEM, A PLURALITY OF I.R. DETECTORS, AND A FIELD LENS FOR IMAGING THE ENTRANCE APERTURE AND THE FILTER ELEMENT ON THE DETECTORS, SAID DETECTORS POSITIONED
Claim 2
Dependent Claim
81 words
IN AN INFRARED OPTICAL SYSTEM, A FILTER ELEMENT AT LEAST CLOSELY ADJACENT THE ENTRANCE APERTURE OF THE OPTICAL SYSTEM, SAID FILTER ELEMENT HAVING A PLURALITY OF SEPARATE PORTIONS, EACH PORTION CAPABLE OF TRANSMITTING SUBSTANTIALLY A SINGLE NARROW FREQUENCY BAND, SAID PORTIONS OF THE FILTER ELEMENT SEPARATING THE NARROW FREQUENCY BANDS FROM EACH OTHER IN THE OPTICAL SYSTEM, A PLURALITY OF I.R. DETECTORS, AND A FIELD LENS FOR IMAGING THE ENTRANCE APERTURE AND THE FILTER ELEMENT ON THE DETECTORS, SAID DETECTORS POSITIONED
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) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |