US3415647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide diffusion transfer process
Assignee: Eastman Kodak Co
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Filing: 1965-05-17
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Granted: 1968-12-10
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Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Edwin B Wyand
- 👤 Raife G Tarkington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:36
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28; G03C8/42; G03C8/52; G03C8/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A LIGHT-INSENSITIVE RECEPTION ELEMENT ADAPTED FOR USE IN A SILVER HALIDE DIFFUSION TRANSFER PROCESS COMPRISING A SUPPORT HAVING COATED THEREON IN ORDER, A FIRST LAYER CONTANING FROM ABOUT 0.5-100 MG. OF SILVER PRECIPITATING AGENT PER SQUARE FOOT, SUPERIMPOSED ON THE FIRST LAYER AN ALKALI PERMEABLE SECOND LAYER RELATIVELY OPAQUE TO LIGHT, AND SUPERIMPOSED OVER THE SECOND LAYER AN ALKALI PERMEABLE THIRD LAYER CONTAINING SUBSTANTIALLY ONLY ENOUGH SILVER PRECIPITATING AGENT FOR THE FORMATION OF AN IMAGE OF GOOD CONTRAST, THE SAID LAYERS CONTAINING A HYDROPHILIC COLLOID BINDER.
Claim 2
Dependent Claim
86 words
A LIGHT-INSENSITIVE RECEPTION ELEMENT ADAPTED FOR USE IN A SILVER HALIDE DIFFUSION TRANSFER PROCESS COMPRISING A SUPPORT HAVING COATED THEREON IN ORDER, A FIRST LAYER CONTANING FROM ABOUT 0.5-100 MG. OF SILVER PRECIPITATING AGENT PER SQUARE FOOT, SUPERIMPOSED ON THE FIRST LAYER AN ALKALI PERMEABLE SECOND LAYER RELATIVELY OPAQUE TO LIGHT, AND SUPERIMPOSED OVER THE SECOND LAYER AN ALKALI PERMEABLE THIRD LAYER CONTAINING SUBSTANTIALLY ONLY ENOUGH SILVER PRECIPITATING AGENT FOR THE FORMATION OF AN IMAGE OF GOOD CONTRAST, THE SAID LAYERS CONTAINING A HYDROPHILIC COLLOID BINDER.
References Cited (Backward Citations)
GB656131A
Cited
GB634169A
Cited
US2543181A
Cited
US2678121A
Cited
US2823122A
Cited
GB746948A
Cited
US2698237A
Cited
BE578578A
Cited
GB874056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |