Patent US3703594A successfully refreshed from Google Patents.
US3703594A
Expired / Lapsed
US
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Method for manufacturing a photoconductive powder
Assignee: Panasonic Holdings Corp
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Filing: 1971-11-09
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Granted: 1972-11-21
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Expires: 1991-11-09
Abstract
Abstract A PHOTOCONDUCTOR OF THE KIND CONSISTING ESSENTIALLY OF CDSE OR CDS-SE, AND CONTAINING COPPER AS AN ACTIVATOR AND A HALOGEN AS A COACTIVATOR. IN THE PHOTOCONDUCTOR, ZINC IS ADDED AS A FURTHER ADDITIVE IN ORDER TO IMPROVE ITS SENSIVITY TO A LOW INTENSITY OPTICAL INPUT AND TO INCREASE ITS DARK RESISTANCE SO THAT THE PHOTOCONDUCTOR CAN BE EMPLOYED FOR THE MANUFACTURE OF VARIOUS PHOTOELECTRIC DEVICES HAVING AN IMPROVED AND STABLE OPERATING CHARACTERISTIC.
Inventors
- 👤 Shigeaki Nakamura
- 👤 Tadao Nakamura
- 👤 Tadao Kohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:07
CPC Classifications
H; H10; H10F; H10F30/00; H10F55/00; H10P; H10P95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |