US3002835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive recording element
Assignee: GAF Chemicals Corp
•
Filing: 1958-07-30
•
Granted: 1961-10-03
•
Expires: 1978-07-30
Abstract
No abstract record available.
Inventors
- 👤 Kostelec Joze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:02
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/02; G03G5/04; G03G5/043; G03G5/0433
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
AN ELECTROPHOTOGRAPHIC RECORDING ELEMENT HAVING INCREASED EFFICIENCY COMPRISING AN ELECTRICALLY CONDUCTING BASE, AN INTERMEDIATE FLUORESCENT LAYER COMPRISING COPPER ACTIVATED ZINC SULFIDE UNIFORMLY DISPERSED THROUGHOUT AN ELECTRICALLY INSULATING BINDER AND AN OUTER PHOTOCONDUCTIVE LAYER COMPRISING ZINC OXIDE DISPERSED IN AN ELECTRICALLY INSULATING BINDER, WHEREBY THE COPPER ACTIVATED ZINC SULFIDE ON EXCITATION BY THE EXPOSED RADIATION EMITS A SECONDARY RADIATION, THE WAVE LENGTH OF WHICH CORRESPONDS TO THE WAVE LENGTH OF THE LIGHT ABSORPTION OF THE ZINC OXIDE.
Claim 2
Dependent Claim
76 words
AN ELECTROPHOTOGRAPHIC RECORDING ELEMENT HAVING INCREASED EFFICIENCY COMPRISING AN ELECTRICALLY CONDUCTING BASE, AN INTERMEDIATE FLUORESCENT LAYER COMPRISING COPPER ACTIVATED ZINC SULFIDE UNIFORMLY DISPERSED THROUGHOUT AN ELECTRICALLY INSULATING BINDER AND AN OUTER PHOTOCONDUCTIVE LAYER COMPRISING ZINC OXIDE DISPERSED IN AN ELECTRICALLY INSULATING BINDER, WHEREBY THE COPPER ACTIVATED ZINC SULFIDE ON EXCITATION BY THE EXPOSED RADIATION EMITS A SECONDARY RADIATION, THE WAVE LENGTH OF WHICH CORRESPONDS TO THE WAVE LENGTH OF THE LIGHT ABSORPTION OF THE ZINC OXIDE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |