Patent US3666460A successfully refreshed from Google Patents.
US3666460A
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US
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Diffusion transfer article and process using humectant in emulsion layer
Assignee: Polaroid Corp
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Filing: 1966-01-11
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Granted: 1972-05-30
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Expires: 1986-01-11
Abstract
Abstract PHOTOGRAPHIC PRODUCTS FOR USE IN DIFFUSION TRANSFER PROCESSES INCLUDING A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER AND WHEREIN THE EMULSION LAYER FURTHER INCLUDES A PHOTOGRAPHICALLY INNOCUOUS HUMCCTANT IN AN AMOUNT SUFFICIENT TO LOWER MATERIALLY THE PROCESSING TIME FOR FORMING THE TRANSFER IMAGE.
Inventors
- 👤 Leonard C Farney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:30
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/40; G03C5/48; G03C8/00; G03C8/42; G03C8/44; G03C8/48; G03C8/52
Claims Analysis
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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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |