US2742550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual photoconductive infrared detector
Assignee: Individual
•
Filing: 1954-04-19
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Granted: 1956-04-17
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Expires: 1974-04-19
Abstract
No abstract record available.
Inventors
- 👤 Jr James R Jenness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:20
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/27; G01; G01J; G01J5/00; G01J5/10; G01J5/20; G01J5/22; G01J5/24; H; H10; H10F; H10F30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PHOTOCONDUCTIVE CELL, IN COMBINATION; A LAYER OF DIELECTRIC MATERIAL TRANSPARENT TO INFRARED RADIATION; A COATING OF PHOTOCONDUCTIVE MATERIAL SENSITIVE TO A FIRST INFRARED WAVE LENGTH BAND ON ONE SIDE OF SAID ELECTRIC LAYER; AND A COATING OF PHOTOCONDUCTIVE MATERIAL SENSITIVE TO A SECOND INFRARED WAVE LENGTH BAND ON THE OTHER SIDE OF SAID DIEELECTRIC LAYER; SAID COATINGS BEING PROVIDED WITH MEANS FOR CONDUCTING CURRENT THEREFROM.
Claim 2
Dependent Claim
67 words
IN A PHOTOCONDUCTIVE CELL, IN COMBINATION; A LAYER OF DIELECTRIC MATERIAL TRANSPARENT TO INFRARED RADIATION; A COATING OF PHOTOCONDUCTIVE MATERIAL SENSITIVE TO A FIRST INFRARED WAVE LENGTH BAND ON ONE SIDE OF SAID ELECTRIC LAYER; AND A COATING OF PHOTOCONDUCTIVE MATERIAL SENSITIVE TO A SECOND INFRARED WAVE LENGTH BAND ON THE OTHER SIDE OF SAID DIEELECTRIC LAYER; SAID COATINGS BEING PROVIDED WITH MEANS FOR CONDUCTING CURRENT THEREFROM.
References Cited (Backward Citations)
US2544261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |