US3037941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive materials
Assignee: EMI Group Ltd
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Filing: 1959-07-15
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Granted: 1962-06-05
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Expires: 1979-07-15
Abstract
No abstract record available.
Inventors
- 👤 Rauby Peter Whitten
- 👤 Hobbs Doreen Yvonne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PRODUCING A FINELY DIVIDED PHOTOCONDUCTIVE POWDER COMPRISING THE STEPS OF MIXING CADMIUM SULFIDE WITH A COPPER ACTIVATOR, A CHLORIDE COACTIVATOR, AND A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LITHIUM CARBONATE, LITHIUM SULFATE AND LITHIUM OXALATE, THERE BEING ABOUT 0.2% OF SAID ACTIVATOR BY WEIGHT OF SAID SULFIDE, ABOUT 1,2-4.4% OF SAID COACTIVATOR BY WEIGHT OF SAID SULFIDE AND ABOUT 0.005%-0.5% OF LITHIUM BY WEIGHT OF SAID SULFIDE; FIRING SAID MIXTURE IN A CLOSED CONTAINER TO A TEMPERATURE FALLING WITHIN THE RANGE OF 700900*C.; COOLING THE FIRED PRODUCT TO ROOM TEMPERATURE; AND WASHING AND DRYING SAID COOLED PRODUCT TO PRODUCE SAID POWDER.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PRODUCING A FINELY DIVIDED PHOTOCONDUCTIVE POWDER COMPRISING THE STEPS OF MIXING CADMIUM SULFIDE WITH A COPPER ACTIVATOR, A CHLORIDE COACTIVATOR, AND A COMPOUND SELECTED FROM THE CLASS CONSISTING OF LITHIUM CARBONATE, LITHIUM SULFATE AND LITHIUM OXALATE, THERE BEING ABOUT 0.2% OF SAID ACTIVATOR BY WEIGHT OF SAID SULFIDE, ABOUT 1,2-4.4% OF SAID COACTIVATOR BY WEIGHT OF SAID SULFIDE AND ABOUT 0.005%-0.5% OF LITHIUM BY WEIGHT OF SAID SULFIDE; FIRING SAID MIXTURE IN A CLOSED CONTAINER TO A TEMPERATURE FALLING WITHIN THE RANGE OF 700900*C.; COOLING THE FIRED PRODUCT TO ROOM TEMPERATURE; AND WASHING AND DRYING SAID COOLED PRODUCT TO PRODUCE SAID POWDER.
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) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |