US2995474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive cadmium sulfide and method of preparation thereof
Assignee: Eastman Kodak Co
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Filing: 1959-10-02
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Granted: 1961-08-08
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Expires: 1979-10-02
Abstract
No abstract record available.
Inventors
- 👤 Pearlman Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:01
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/233; H10; H10P; H10P95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31931; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD FOR PREPARING PHOTOCONDUCTIVE CADMIUM SULFIDE COMPRISING FIRING PRECIPITATED LUMINESCENT GRADE CADMIUM SULFIDE, CONTAINING 10-150 P.P.M. COPPER IN THE FORM OF A COPPER SALT FOR A PERIOD OF 20-60 MINUTES AT 500-800*C. IN AN ATMOSPHERE COMPOSED OF HYDROGEN, HYDROGEN SULFIDE, AND HYDROGEN CHLORIDE SO CHOSEN THAT THE RATIO OF HYDROGEN TO HYDROGEN SULFIDE KEEPS THE DISSOCIATION PRESSURE OF CADMIUM ARISING FROM THE CADMIUM SULFIDE AT FROM 10-1 TO 10-5 ATMOSPHERE AND THE RATIO OF HYDROGEN TO HYDROGEN CHLORIDE VARIES FROM 100:1 TO 1:1 BY VOLUME.
Claim 2
Independent Claim
86 words
A METHOD FOR PREPARING PHOTOCONDUCTIVE CADMIUM SULFIDE COMPRISING FIRING PRECIPITATED LUMINESCENT GRADE CADMIUM SULFIDE, CONTAINING 10-150 P.P.M. COPPER IN THE FORM OF A COPPER SALT FOR A PERIOD OF 20-60 MINUTES AT 500-800*C. IN AN ATMOSPHERE COMPOSED OF HYDROGEN, HYDROGEN SULFIDE, AND HYDROGEN CHLORIDE SO CHOSEN THAT THE RATIO OF HYDROGEN TO HYDROGEN SULFIDE KEEPS THE DISSOCIATION PRESSURE OF CADMIUM ARISING FROM THE CADMIUM SULFIDE AT FROM 10-1 TO 10-5 ATMOSPHERE AND THE RATIO OF HYDROGEN TO HYDROGEN CHLORIDE VARIES FROM 100:1 TO 1:1 BY VOLUME.
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) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |