Patent US3298832A successfully refreshed from Google Patents.
US3298832A
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Copper gluconate containing receiving element and its diffusion transfer photography use
Assignee: Polaroid Corp
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Filing: 1962-09-26
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Granted: 1967-01-17
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Expires: 1982-09-26
Abstract
No abstract record available.
Inventors
- 👤 William H Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:45
CPC Classifications
G; G03; G03C; G03C8/00; G03C1/00; G03C1/005; G03C1/06; G03C1/37; G03C8/24; G03C8/26; G03C8/28; G03D; G03D9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
IN A DIFFUSION TRANSFER PROCESS, THE STEPS WHICH COMPRISE DEVELOPING AN EXPOSED PHOTOSENSITIVE SILVER HALIDE EMULSION WITH A PROCESSING COMPOSITION COMPRISING A SILVER HALIDE DEVELOPING AGENT AND A SILVER HALIDE SOLVENT, FORMING THEREBY AN IMAGEWISE DISTRIBUTION OF SOLUBLE SILVER COMPLEX AS A FUNCTION OF THE POINT-TO-POINT DEGREE OF EXPOSURE THEREOF, AND TRANSFERRING AT LEAST PART OF SAID IMAGEWISE DISTRIBUTION OF SOLUBLE SILVER COMPLEX, BY IMBITITION, FROM SAID EMULSION, TO A SUPERPOSED IMAGE-RECEIVING LAYER CONTAINING COPPER GLUCONATE AND SILVER PRECIPITATING NUCLEI DISPERSED IN A PERMEABLE MATRIX, TO THEREBY PROVIDE A VISIBLE TRANSFER IMAGE.
References Cited (Backward Citations)
US2584017A
Cited
US2257440A
Cited
US2584030A
Cited
US2635048A
Cited
US2662822A
Cited
US2650875A
Cited
US2698237A
Cited
US3073723A
Cited
US3087815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |