US3625685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color diffusion-transfer element comprising aqueous film-forming synthetic polymer suspension layers intermediate its sensitive layers and processes for their use
Assignee: Polaroid Corp
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Filing: 1971-02-26
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Granted: 1971-12-07
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Expires: 1991-02-26
Abstract
Abstract DIFFUSION TRANSFER PHOTOGRAPHIC PRODUCTS COMPRISING A SUPPORT CARRYING AT LEAST TWO SELECTIVELY SENSITIZED SILVER HALIDE EMULSION LAYERS, EACH HAVING A DYE WHICH IS A SILVER HALIDE DEVELOPING AGENT OF PREDETERMINED COLOR ASSOCIATED THEREWITH, AND A LAYER INTERMEDIATE THE EMULSION LAYERS COMPRISING A DYE IMPERMEABLE COALSCED ESSENCE OF AN AQUEOUS FILM-FROMING POLYMER DISPERSION AND A PROCESSING COMPOSITION PERMEABLE MATERIAL ASSOCIATED THEREWITH AND ADAPTED TO RENDER SAID LAYER PERMEABLE TO SOLUBILIZED DYE IMAGE-FORMING MATERIAL SUBSQUENT TO BEING CONTACTED WITH PROCESSING COMPOSITION.
Inventors
- 👤 James A Avtges
- 👤 Jerome L Reid
- 👤 Lloyd D Taylor
- 👤 Herbert N Schlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:42
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |