Patent US3345168A successfully refreshed from Google Patents.
US3345168A
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Diffusion transfer receiving sheet containing china clay and an aliphatic amine
Assignee: Eastman Kodak Co
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Filing: 1963-11-19
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Granted: 1967-10-03
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Hans M Wagner
- 👤 Wojciech M Przezdziecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:15
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A PROCESS OF FORMING IMAGES BY THE DIFFUSION TRANSFER PROCESS WHICH COMPRISES DEVELOPING AN EXPOSED SILVER HALIDE EMULSION, TRANSFERRING THE SILVER HALIDE BY DIFFUSION FROM THE UNDEVELOPED AREAS OF THE EMULSION LAYER IN CONTIGUITY WITH A SILVER HALIDE SOLVENT TO AN IMAGE RECEIVING LAYER CONTAINING A NUCLEATING COMPOSITION, SAID COMPOSITION COMPRISING CHINA CLAY HAVING DISPERSED THEREIN SILVER PRECIPITATING AGENTS HAVING AN AVERAGE DIAMETER OF ABOUT 25 A. TO ABOUT 2500 A. AND AN ALIPHATIC AMINE HAVING 14 TO 18 CARBON ATOMS SELECTED FROM THE CLASS CONSISTING OF THE AMINE AND SALTS THEREOF.
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |