Unitary, permanently composite, photographic light-sensitive sheet material for use in the silver complex diffusion transfer process for producing images
Abstract
Abstract A good quality reproduction can be obtained by the silver complex diffusion transfer process in a unitary permanently composite sheet material comprising of a nontransparent flexible sheet support, a light-sensitive silver halide emulsion layer and a layer containing an opaque white or colored pigment and a hydrophilic colloid binder, provided the pigment is present in amounts from 9-25 g. per sq.m. and the binder therefore in 0.5-3 g. per sq.m. and at least one photographic developing agent for the silver halide is contained in the material. Development nuclei for the complex silver halide can be supplied in an outer stratum of the pigmented layer or in a thin colloid layer superimposed thereon or can be incorporated in situ by means of a treatment bath containing the same which can be the alkaline processing liquid for forming the diffusion transfer image. Light-sensitive unitary composite materials useful for this purpose are also described.
Inventors
- 👤 Louis De Haes
- 👤 Emiel Alexander Hofman
- 👤 Hugo Karel Gevers
Bibliographic Details
Claims Analysis
Total Claims: 14References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |