Color diffusion transfer film unit containing a temporary barrier for developer restrainers
Abstract
Abstract FILM UNITS INCLUDING A NEGATIVE COMPONENT CONTAINING AT LEAST ONE LIGHT-SENSITIVER SILVER HALIDE LAYER AND ASSOCIATED DYE IMAGE-PROVIDING MATERIAL AND A POSITIVE COMPONENT CONTAINING AT LEAST A DYEABLE STRATUM, THE POSITIVE COMPONENT FURTHER INCLUDING A DEVELOPMENT RESTRAINER DISPOSED IN THE DYEABLE STRATUM AND/OR IN AN ASSOCIATED LAYER, PARTICULARLY SUCH FILM UNITS ADAPTED FOR FORMING COLOR TRANSFER IMAGES VIEWABLE WITHOUT SEPARATION, WHEREIN A LAYER IS DISPOSED BETWEEN THE DEVLOPMENT RESTRAINER AND THE NEGATIVE COMPONENT, WHICH LAYER IS SO CONSTITUTED AS TO PREVENT SUBSTANTIAL MIGRATION OF THE DEVELOPMENT RESTRAINER TO THE NEGATIVE COMPONET DURING THE SHELF LIFE OF THE FILM BUT WHICH WILL PERMIT SUCH MIGRATION UPON APPLICATION OF AN AQUEOUS ALKALINE FLUID.
Inventors
- 👤 Lester H Arond
Bibliographic Details
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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 |