Patent US3799774A successfully refreshed from Google Patents.
US3799774A
Expired / Lapsed
US
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Multicolor electrophotographic masking process
Assignee: Xerox Corp
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Filing: 1972-11-13
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Granted: 1974-03-26
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Expires: 1992-11-13
Abstract
Abstract A COLOR MASKING TECHNIQUE SUITABLE FOR USE IN A XEROGRAPHIC SUBSTRACTIVE COLOR PROCESS. A FIRST SUBSTRATE TONER IMAGE, DEVELOPED UPON A PHOTOSENSITIVE PLATE, IS UTILIZED TO OPTICALLY MASK THE PLATE IN A MANNER WHEREBY THE LATENT ELECTROSTATIC IMAGE REPRESENTATIVE OF THE NEXT SUBTRACTIVE TONER TO BE APPLIED TO THE PLATE IS ELECTRICALLY CORRECTED TO COMPENSATE FOR THE UNWANTED CHARACTERISTIC OF THE FIRST TONER TO ABSORB LIGHT ENERGY WITHIN THE ABSORPTIVE DOMAIN OF THE SECOND TONER.
Inventors
- 👤 S Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:29
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/01; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |