US3705804A
Expired / Lapsed
US
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Diffusion transfer production of reflection positive with macroscopic pigment in receptive stratum
Assignee: Polaroid Corp
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Filing: 1971-04-07
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Granted: 1972-12-12
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Expires: 1991-04-07
Abstract
Abstract PHOTOGRAPHIC PRODUCTS FOR FORMING COMPOSITE PRINT VIEWABLE AS A POSITIVE SILVER IMAGE, INCLUDING A SILVER HALIDE EMULSION LAYER, AN OPACIFYING MATERIAL IN THE EMULSION LAYER AND/OR IN AN OVERLYING LAYER, AND AN OUTER LAYER COMPRISING A SILVER-RECEPTIVE STRATUM, WHEREIN THE SILVER-RECEPTIVE STRATUM INCLUDES A MACROSCOPIC PIGMENT.
Inventors
- 👤 Leonard C Farney
- 👤 Richard J Haberlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:43
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/44
Claims Analysis
Total Claims: 0
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |