US3674480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic dry copying process
Assignee: Agfa Gevaert AG
•
Filing: 1970-04-28
•
Granted: 1972-07-04
•
Expires: 1990-04-28
Abstract
Abstract PHOTOGRAPHIC PRINTS CAN BE PRODUCED BY IMAGEWISE ESPOSURE OF A LIGHT-SENSITIVE LAYER CONTAINING A TRANSFERABLE IMAGE PRODUCING COMPOUND AND A LIGHT-SENSITIVE COMPOUND CAPABLE OF REACTING UPON EXPOSURE WITH AN IMAGE PRODUCING COMPOUND TO YIELD A NON-TRANSFERABLE REACTION PRODUCT. THE EXPOSED LAYER IS HEATED AND CONTACTED WITH AN IMAGE RECEIVING LAYER CONTAINING COMPOUNDS CAPABLE OF REACTING WITH THE HEAT TRANSFERRED IMAGE PRODUCING COMPOUND TO FORM THE IMAGE DYE. THE LIGHT-SENSITIVE COMPOUND IS AN ORGANIC AZIDE COMPOUND AND THE IMAGE PRODUCING TRANSFERABLE COMPOUND A COMPOUND OF THE PYRAZOLIDONE-3-SERIES.
Inventors
- 👤 Helmut Kampfer
- 👤 Anita Von Konig
- 👤 Harald Von Rintelen
- 👤 Dietmar Mayer
- 👤 Klaus Sasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:58
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/56; G03C1/00; G03C1/695
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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 |