Patent US2884507A successfully refreshed from Google Patents.
US2884507A
Expired / Lapsed
US
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Photoconductive device and method of making same
Assignee: Dresser Industries Inc
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Filing: 1956-10-01
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Granted: 1959-04-28
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Akos Z Czipott
- 👤 Acey L Floyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:11
CPC Classifications
H; H10; H10P; H10P95/00; H10F; H10F30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PHOTOCONDUCTIVE DEVICE COMPRISING: A LAYER-LIKE DEPOSIT OF A MIXTURE OF FINELY DIVIDED PHOTOCONDUCTIVE MATERIAL COMPRISING PRINCIPALLY POWDERED CADMIUM SULPHIDE, A MODICUM OF POWDERED CUPRIC CHLORIDE AND POWDERED CADMIUM CHLORIDE IN A QUANTITY OF APPROXIMATELY 500 PARTS PER MILLION PARTS OF CADMIUM SULPHIDE IN THE MIXTURE SAID DEPOSIT MIXTURE HAVING BEEN BAKED AT A TEMPERATURE BELOW THE DIFFUSION TEMPERATURE OF SAID CADMIUM SULPHIDE.
Claim 2
Dependent Claim
63 words
A PHOTOCONDUCTIVE DEVICE COMPRISING: A LAYER-LIKE DEPOSIT OF A MIXTURE OF FINELY DIVIDED PHOTOCONDUCTIVE MATERIAL COMPRISING PRINCIPALLY POWDERED CADMIUM SULPHIDE, A MODICUM OF POWDERED CUPRIC CHLORIDE AND POWDERED CADMIUM CHLORIDE IN A QUANTITY OF APPROXIMATELY 500 PARTS PER MILLION PARTS OF CADMIUM SULPHIDE IN THE MIXTURE SAID DEPOSIT MIXTURE HAVING BEEN BAKED AT A TEMPERATURE BELOW THE DIFFUSION TEMPERATURE OF SAID CADMIUM SULPHIDE.
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) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |