Patent US3576624A successfully refreshed from Google Patents.
US3576624A
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US
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Electrostatic printing method employing a pigmented light filter
Assignee: Research Laboratories of Australia Pty Ltd
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Filing: 1967-10-17
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Granted: 1971-04-27
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Expires: 1987-10-17
Abstract
Abstract SUPERIOR PRINTS IN A MULTIPLE SERIES, USING ELECTROSTATIC PHENOMENA, ARE OBTAINED BY FIRST PREPARING A MASTER IMAGE USING A DEVELOPER OF YELLOW COLOR ESTABLISHED AS BEING EFFECTIVE TO SUSTAIN A CHARGE OVER A PERIOD OF TIME FAR IN EXCESS OF A MASTER IMAGE PREPARED FROM A DEVELOPER OF BLACK COLOR OR ONE WHICH OMITS YELLOW PIGMENT.
Inventors
- 👤 Josef Matkan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:09
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/122; G03G13/00; G03G13/22; G03G5/00; G03G5/02; Y; Y10; Y10S; Y10S101/00; Y10S101/37
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |