US3597614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cadmium phosphide photoconductive infrared detector
Assignee: United States Department of the Navy
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Filing: 1970-06-25
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Granted: 1971-08-03
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Expires: 1990-06-25
Abstract
Abstract A cadmium phosphide photoconductive detector is provided having a 2.1 micron peak in photoconductive sensitivity and a 0.6 eV energy gap at 77* K. It may be compensated with various known impurities to lower the free carrier concentration.
Inventors
- 👤 Stephen G Bishop
- 👤 William J Moore
- 👤 Edward M Swiggard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:40
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
The device recited in claim 1 wherein said detector element has maximum sensitivity for radiation wavelengths of about 2.1 micron.
Claim 2
Dependent Claim
13 words
The device recited in claim 1 wherein the acceptor impurity atoms are copper.
References Cited (Backward Citations)
BE626493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |