Patent US3672887A successfully refreshed from Google Patents.
US3672887A
Expired / Lapsed
US
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Electrophotographic process for multicolor reproduction
Assignee: Xerox Corp
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Filing: 1970-08-17
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Granted: 1972-06-27
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Expires: 1990-08-17
Abstract
Abstract REPRODUCTION OF A MULTICOLOR ORIGINAL IN AN ELECTROPHOTOGRAPHIC DEVELOPMENT EMPLOYING SUPERIMPOSED DEVELOPEMNT OF MULTIPLE ELECTROSTATIC LATENT IMAGES PRESENT ON AN ELECTROPHOTOGRAPHIC PHOTOSENSITIVE LAYER WHICH IS PROVIDED WITH LOW PHOTOCONDUCTIVITY FOR A CERTAIN WAVELENGTH REGION, AND HAS INCREASED PHOTOCONDUCTIVITY IN AT LEAST A PART OF THE REMAINING WAVELENGTH REGION. AT LEAST ONE DEVELOPMENT IS OBTAINED WITH A TONER HAVING PHOTOCONDUCTIVITY FOR LIGHT OF THE WAVELENGTH REGION IN WHICH THE ELECTROPHOTOGRAPHIC LEVEL HAS LOW PHOTOCONDUCTIVITY.
Inventors
- 👤 Seiji Matsumoto
- 👤 Yasuo Tamai
- 👤 Masaaki Takimoto
- 👤 Masamichi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G13/00; G03G13/01; G03G9/122
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |