Patent US3203796A successfully refreshed from Google Patents.
US3203796A
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Use of starch ether layers in diffusion transfer processes
Assignee: Gevaert Photo Producten NV
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Filing: 1962-04-27
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Granted: 1965-08-31
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Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
- 👤 Verelst Johan Lodewijk
- 👤 Lemmerling Jose Therese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:33
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD FOR OBTAINING AN IMAGE ACCORDING TO THE SILVER HALIDE DIFFUSION TRANSFER PROCESS COMPRISING THE STEPS OF IMAGE-WISE EXPOSING A MULTILAYER MATERIAL COMPRISING SUCCESSIVELY A SUPPORT, AN IMAGE-RECEIVING LAYER CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DEVELOPMENT NUCLEI AND SUBSTANCES CAPABLE OF FORMING SUCH NUCLEI, A LAYER ESSENTIALLY CONSISTING OF A STARCH ETHER AND A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER, TREATING THE EXPOSED MULTI-LAYER MATERIAL IN THE PRESENCE OF A SILVER HALIDE COMPLEXING AGENT WITH A DEVELOPING SOLUTION AND BRINGING THE THUS TREATED MULTI-LAYER MATERIAL IN AN AQUEOUS RINSING BATH SO THAT THE SILVER HALIDE EMULSION LAYER DETACHES AS A COHERENT MEMBRANE.
Claim 2
Independent Claim
105 words
A METHOD FOR OBTAINING AN IMAGE ACCORDING TO THE SILVER HALIDE DIFFUSION TRANSFER PROCESS COMPRISING THE STEPS OF IMAGE-WISE EXPOSING A MULTILAYER MATERIAL COMPRISING SUCCESSIVELY A SUPPORT, AN IMAGE-RECEIVING LAYER CONTAINING A MEMBER SELECTED FROM THE GROUP CONSISTING OF DEVELOPMENT NUCLEI AND SUBSTANCES CAPABLE OF FORMING SUCH NUCLEI, A LAYER ESSENTIALLY CONSISTING OF A STARCH ETHER AND A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER, TREATING THE EXPOSED MULTI-LAYER MATERIAL IN THE PRESENCE OF A SILVER HALIDE COMPLEXING AGENT WITH A DEVELOPING SOLUTION AND BRINGING THE THUS TREATED MULTI-LAYER MATERIAL IN AN AQUEOUS RINSING BATH SO THAT THE SILVER HALIDE EMULSION LAYER DETACHES AS A COHERENT MEMBRANE.
References Cited (Backward Citations)
GB654631A
Cited
US2363764A
Cited
GB706333A
Cited
DE1013965B
Cited
US3043691A
Cited
DE1055953B
Cited
GB869190A
Cited
US3087815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |