US2662822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic transfer processes and compositions for the practice of said processes
Assignee: Polaroid Corp
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Filing: 1949-04-21
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Granted: 1953-12-15
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Expires: 1969-04-21
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:05
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28; G03C8/02; G03C8/04; G03C8/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
204 words
THE PROCESS OF OBTAINING TRANSFER PRINTS WHICH COMPRISES APPLYING A RELATIVELY THIN, DISCRETE LAYER OF A LIQUID PROCESSING COMPOSITION ON THE SURFACE OF A PHOTOSENSITIVE SILVER HALIDE ELEMENT CONTAINING A LATENT IMAGE, SAID COMPOSITION, WHEN APPLIED, INCLUDING A SILVER HALIDE DEVELOPER, A SILVER HALIDE SOLVENT, SOLID MINUTE PARTICLES OF A SUBSTANCE INSOLUBLE IN SAID COMPOSITION FOR ACCELERATING THE REDUCTION BY SAID DEVELOPER OF SILVER-BEARING IONS IN SOLUTION IN SAID COMPOSITION, AND A THICKENING AGENT INCREASING THE VISCOSITY OF SAID COMPOSITION SUFFICIENTLY TO KEEP SAID PARTICLES IN SUSPENSION, SAID THICKENING AGENT PROVIDING A SOLID FILM UPON THE REMOVAL OF THE LIQUID CONTENT OF SAID LAYER OF PROCESSING COMPOSITION, TRANSPORTING, BY ABSORPTION, PART AT LEAST ONE SAID COMPOSITION INTO THE SILVER HALIDE LAYER OF SAID ELEMENT, DEVELOPING THE LATENT IMAGE AND FORMING A SOLUBLE COMPLEX WITH UNDEVELOPED SILVER HALIDE IN A STRATUM OF THE SILVER HALIDE LAYER OF SAID ELEMENT PERMEATED BY THE LIQUID OF THE COMPOSITON, TRANSPORTING SAID SOLUBLE COMPLEX FROM SAID EMULSION TO THE FILM OF SAID THICKENING AGENT REMAINING ON SAID SURFACE, AND RAPIDLY PRECIPITATING SILVER FROM THE SOLUTION OF SAID COMPLEX TO FORM AN IMAGE IN SILVER IN SAID FILM WHICH IS THE POSITIVE OF THE SUBJECT MATTER OF THE LATENT IMAGE.
Claim 2
Dependent Claim
204 words
THE PROCESS OF OBTAINING TRANSFER PRINTS WHICH COMPRISES APPLYING A RELATIVELY THIN, DISCRETE LAYER OF A LIQUID PROCESSING COMPOSITION ON THE SURFACE OF A PHOTOSENSITIVE SILVER HALIDE ELEMENT CONTAINING A LATENT IMAGE, SAID COMPOSITION, WHEN APPLIED, INCLUDING A SILVER HALIDE DEVELOPER, A SILVER HALIDE SOLVENT, SOLID MINUTE PARTICLES OF A SUBSTANCE INSOLUBLE IN SAID COMPOSITION FOR ACCELERATING THE REDUCTION BY SAID DEVELOPER OF SILVER-BEARING IONS IN SOLUTION IN SAID COMPOSITION, AND A THICKENING AGENT INCREASING THE VISCOSITY OF SAID COMPOSITION SUFFICIENTLY TO KEEP SAID PARTICLES IN SUSPENSION, SAID THICKENING AGENT PROVIDING A SOLID FILM UPON THE REMOVAL OF THE LIQUID CONTENT OF SAID LAYER OF PROCESSING COMPOSITION, TRANSPORTING, BY ABSORPTION, PART AT LEAST ONE SAID COMPOSITION INTO THE SILVER HALIDE LAYER OF SAID ELEMENT, DEVELOPING THE LATENT IMAGE AND FORMING A SOLUBLE COMPLEX WITH UNDEVELOPED SILVER HALIDE IN A STRATUM OF THE SILVER HALIDE LAYER OF SAID ELEMENT PERMEATED BY THE LIQUID OF THE COMPOSITON, TRANSPORTING SAID SOLUBLE COMPLEX FROM SAID EMULSION TO THE FILM OF SAID THICKENING AGENT REMAINING ON SAID SURFACE, AND RAPIDLY PRECIPITATING SILVER FROM THE SOLUTION OF SAID COMPLEX TO FORM AN IMAGE IN SILVER IN SAID FILM WHICH IS THE POSITIVE OF THE SUBJECT MATTER OF THE LATENT IMAGE.
Claim 3
Dependent Claim
106 words
A LIQUID PROCESSING COMPOSITION FOR FORMING PRINTS BY THE TRANSFER OF COMPONENTS FROM A SILVER HALIDE EMULSION, SAID COMPOSITION COMPRISING A SILVER HALIDE DEVELOPER, SOLID MINUTE PARTICLES OF A SUBSTANCE SUBSTANTIALLY INSOLUBLE IN SAID COMPOSITION, SAID PARTICLES CONSTITUTING REDUCTION CENTERS FOR ACCELERATING THE REDUCTION BY SAID DEVELOPER OF SILVER-BEARING IONS IN SAID COMPOSITION, AND A THICKENING AGENT INCREASING THE VISCOSITY OF THE COMPOSITION SUFFICIENTLY TO KEEP THE PARTICLES IN SUSPENSION, SAID THICKENING AGENT PROVIDING A SOLID, FILM-FORMING RESIDUE WHEN THE LIQUID OF SAID COMPOSITION IS REMOVED THEREFROM, SAID SUBSTANCE BEING AT LEAST ONE COMPOUND FROM THE CLASS CONSISTING OF THE RELATIVELY INSOLUBLE METAL SULFIDES AND SELENIDES.
Claim 4
Dependent Claim
106 words
A LIQUID PROCESSING COMPOSITION FOR FORMING PRINTS BY THE TRANSFER OF COMPONENTS FROM A SILVER HALIDE EMULSION, SAID COMPOSITION COMPRISING A SILVER HALIDE DEVELOPER, SOLID MINUTE PARTICLES OF A SUBSTANCE SUBSTANTIALLY INSOLUBLE IN SAID COMPOSITION, SAID PARTICLES CONSTITUTING REDUCTION CENTERS FOR ACCELERATING THE REDUCTION BY SAID DEVELOPER OF SILVER-BEARING IONS IN SAID COMPOSITION, AND A THICKENING AGENT INCREASING THE VISCOSITY OF THE COMPOSITION SUFFICIENTLY TO KEEP THE PARTICLES IN SUSPENSION, SAID THICKENING AGENT PROVIDING A SOLID, FILM-FORMING RESIDUE WHEN THE LIQUID OF SAID COMPOSITION IS REMOVED THEREFROM, SAID SUBSTANCE BEING AT LEAST ONE COMPOUND FROM THE CLASS CONSISTING OF THE RELATIVELY INSOLUBLE METAL SULFIDES AND SELENIDES.
References Cited (Backward Citations)
US1279276A
Cited
FR761428A
Cited
GB470855A
Cited
US2121397A
Cited
US2323246A
Cited
US2317750A
Cited
NL59365C
Cited
FR873507A
Cited
FR53513E
Cited
FR879995A
Cited
FR53311E
Cited
US2532014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |