Patent US3706559A successfully refreshed from Google Patents.
US3706559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for making positive full-color dye-transfer prints
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1969-02-27
•
Granted: 1972-12-19
•
Expires: 1989-02-27
Abstract
Abstract METHODS ARE DISCLOSED FOR MAKING POSITIVE FULL-COLOR DYE-TRANSFER PRINTS BY IMAGEWISE EXPOSURE, TO A COLOR NEGATIVE, OF PHOTOGRAPHIC IMAGING MEDIA COMPRISING A FINELY-DIVIDED PHOTOCONDUCTOR AS THE PHOTOSENSITIVE AGENT. THE EXPOSED IMAGING MEDIA ARE DEVELOPED, IN THE PRESENCE OF A REUCIBLE METAL ION, WITH COUPLERS AND DEVELOPERS FORMING CYAN, MAGENTA, OR YELLOW DYE IMAGES IN RADIATIONEXPOSED PORTIONS THEREOF. THESE DYE IMAGES COMBINE TO REPRODUCE THE ORIGINAL IMAGE IN A FULL-COLOR PRINT.
Inventors
- 👤 Robert H Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/705; G03C7/00; G03C7/22; G03C7/25
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |