Patent US3227877A successfully refreshed from Google Patents.
US3227877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled infrared detector system with means to eliminate radiation from the instrument itself
Assignee: Barnes Engineering Co
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Filing: 1963-01-30
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Granted: 1966-01-04
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Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Marc G Dreyfus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:44
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A COOLED PHOTODETECTOR COMPRISING IN COMBINATION, (A) A PHOTODETECTOR, (B) THE PHOTODETECTOR BEING MOUNTED ON A SUBSTRATE LAYER OF INFRARED TRANSPARENT MATERIAL, (C) A MIRROR SURFACE ON THE BACK OF THE INFRARED TRANSPARENT LAYER, (D) MEANS FOR COOLING THE MIRROR BY RADIATION WHICH COMPRISES A SURFACE OF HIGH INFRARED EMISSIVITY ON THE BACK OF THE MIRROR, AND (E) MEANS FOR SHIELDING SAID SURFACE OF HIGH EMISSIVITY FROM RADIATION AT A TEMPERATURE ABOVE THAT OF THE COOLING MEANS.
Claim 2
Dependent Claim
77 words
A COOLED PHOTODETECTOR COMPRISING IN COMBINATION, (A) A PHOTODETECTOR, (B) THE PHOTODETECTOR BEING MOUNTED ON A SUBSTRATE LAYER OF INFRARED TRANSPARENT MATERIAL, (C) A MIRROR SURFACE ON THE BACK OF THE INFRARED TRANSPARENT LAYER, (D) MEANS FOR COOLING THE MIRROR BY RADIATION WHICH COMPRISES A SURFACE OF HIGH INFRARED EMISSIVITY ON THE BACK OF THE MIRROR, AND (E) MEANS FOR SHIELDING SAID SURFACE OF HIGH EMISSIVITY FROM RADIATION AT A TEMPERATURE ABOVE THAT OF THE COOLING MEANS.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |