Patent US2789054A successfully refreshed from Google Patents.
US2789054A
Expired / Lapsed
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Print-receiving elements for diffusion transfer reversal processes and film assemblies embodying said elements
Assignee: Polaroid Corp
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Filing: 1953-12-29
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Granted: 1957-04-16
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Expires: 1973-12-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A PHOTOGRAPHIC FILM ASSEMBLY CAPABLE OF PERFORMING A DIFFUSION TRANSFER REVERSAL PROCESS AND COMPRISING A PHOTOSENSITIVE ELEMENT INCLUDING A SILVER HALIDE LAYER, A PRINT-RECEIVING ELEMENT AND A CONTAINER CARRYING A PROCESSING LIQUID, SAID ELEMENTS AND SAID CONTAINER BEING OPERATIVELY SECURED TOGETHER SO THAT SAID CONTAINER IS CAPABLE OF RELEASING ITS LIQUID CONTENT TO PERMEATE SUPERPOSED PORTIONS OF SAID ELEMENTS, SAID PRINT-RECEIVING ELEMENT COMPRISING A SUPPORT AND A PERMEABLE PRINTRECEIVING STRATUM, THE COMBINATION WITH SAID SUPPORT AND SAID STRATUM OF A SUBCOAT LOCATED THEREBETWEEN, SAID SUBCOAT COMPRISING TWO SUPERPOSED FILMS OF PLASTIC, ONE OF SAID FILMS BEING FROM THE CLASS CONSISTING OF THE POLYVINYL ACETALS AND THE POLYACRYLICS, AND THE OTHER OF SAID FILMS BEING A CELLULOSIC ESTER.
Claim 2
Dependent Claim
118 words
IN A PHOTOGRAPHIC FILM ASSEMBLY CAPABLE OF PERFORMING A DIFFUSION TRANSFER REVERSAL PROCESS AND COMPRISING A PHOTOSENSITIVE ELEMENT INCLUDING A SILVER HALIDE LAYER, A PRINT-RECEIVING ELEMENT AND A CONTAINER CARRYING A PROCESSING LIQUID, SAID ELEMENTS AND SAID CONTAINER BEING OPERATIVELY SECURED TOGETHER SO THAT SAID CONTAINER IS CAPABLE OF RELEASING ITS LIQUID CONTENT TO PERMEATE SUPERPOSED PORTIONS OF SAID ELEMENTS, SAID PRINT-RECEIVING ELEMENT COMPRISING A SUPPORT AND A PERMEABLE PRINTRECEIVING STRATUM, THE COMBINATION WITH SAID SUPPORT AND SAID STRATUM OF A SUBCOAT LOCATED THEREBETWEEN, SAID SUBCOAT COMPRISING TWO SUPERPOSED FILMS OF PLASTIC, ONE OF SAID FILMS BEING FROM THE CLASS CONSISTING OF THE POLYVINYL ACETALS AND THE POLYACRYLICS, AND THE OTHER OF SAID FILMS BEING A CELLULOSIC ESTER.
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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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |