US3671242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver salt diffusion process
Assignee: Agfa Gevaert AG
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Filing: 1969-12-30
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Granted: 1972-06-20
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Expires: 1989-12-30
Abstract
Abstract THE IMAGE TONE OF SILVER IMAGES PRODUCED BY THE SILVER SLAT DIFFUSION PROCESS IS UNPROVED BY PERFORMING THE DEVELOPMENT IN THE PRESENCE OF XXXXXXRIAZINE BLUE TONERS.
Inventors
- 👤 Werner Liebe
- 👤 Siegfried Petersen
- 👤 Anita Von Konig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:53
CPC Classifications
C; C07; C07D; C07D253/00; C07D253/02; C07D253/06; G; G03; G03C; G03C8/00; G03C8/24; G03C8/243
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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |