US3674362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exposure and development device for wet-type electrostatic photography
Assignee: Ricoh Co Ltd
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Filing: 1969-05-16
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Granted: 1972-07-04
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Expires: 1989-05-16
Abstract
Abstract AN EXPOSURE AND DEVELOPING DEVICE FOR WET-TYPE ELECTROSTATIC PHOTOGRAPHY IN WHICH PRIOR TO EXPOSURE A LIGHT SENSITIZED SHEET IS MOISTENED WITH A PRE-MOISTENING LIQUID OR AGENT. THE PRE-MOISTENING LIQUID IN TANKS DISPOSED ON THE OPPOSITE SIDES OF THE EXPOSURE DEVICE RESPECTIVELY IS APPLIED BY APPLICATION ROLLERS TO THE SENSITIZED SHEET BEING ADVANCED WITH ITS LIGHT SENSITIZED LAYER BEING DIRECTED DOWNWARDLY. BY APPLICATION OF THE PRE-MOISTENING LIQUID OR AGENT, A SOFT TONE IMAGE IS OBTAINED, THEREBY RENDERING VISIBLE THE DETAILS OF THE IMAGE.
Inventors
- 👤 Sadanao Ando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/04; G03G5/00; G03G5/005; G03G15/043; G03G15/0435
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |