US3560203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic developing process
Assignee: Fujifilm Holdings Corp
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Filing: 1967-11-02
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Granted: 1971-02-02
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Expires: 1987-11-02
Abstract
Abstract IN AN ELECTROPHOTOGRAPHIC LIQUID DEVELOPING PROCESS WHEREIN A REVERSAL DEVELOPMENT IS CARRIED OUT WHILE APPLYING AN EXTERNAL VOLTAGE, THE IMPROVEMENT COMPRISING VARYING SAID EXTERNAL VOLTAGE SO AS TO BE SYNCHRONIZED WITH THE ATTENUATION CHARACTERISTICS OF A LIGHT SENSITIVE LAYER IN CONTACT WITH THE LIQUID DEVELOPING SOLUTION, AND THEREBY APPLYING A VOLTAGE SUFFICIENT TO JUST NEGATIVE AN ELECTRIC FIELD BY ELECTRIC CHARGES OF A MAXIMUM CHARGE DENSITY OR A VOLTAGE SLIGHTLY LESS THAN THAT.
Inventors
- 👤 Satoru Honjo
- 👤 Masamichi Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:51
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/06; G03G13/10
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |