Patent US2442382A successfully refreshed from Google Patents.
US2992104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products and processes
Assignee: Polaroid Corp
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Filing: 1958-03-03
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Granted: 1961-07-11
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Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR WHEREIN A LATENT IMAGE CONTAINED IN AN EXPOSED GELATINO SILVER HALIDE EMULSION LAYER OF A PHOTOSENSITIVE ELEMENT IS DEVELOPED TO PROVIDE AN IMAGEWISE DISTRIBUCOLOR-PROVIDING SUBSTANCES BEING SELECTED FROM THE GROUP CONSISTING OF COLOR COUPLERS AND DYES, AND SAID IMAGEWISE DISTRIBUTION OF COLOR-PROVIDING SUBSTANCES IS TRANSFERRED BY AN ALKALINE AQUEOUS PROCESSING SOLUTION TO A SUPERPOSED IMAGE-RECEIVING ELEMENT TO IMPART TO SAID IMAGE-RECEIVING ELEMENT A POSITIVE COLORED IMAGE, THE IMPROVEMENT OF DISPOSING THE COLOR-PROVIDING SUBSTANCE IN A LAYER OF NITRO CARBOXXYMETHYL CELLULOSE POLYMER, SAID LAYER OF NITRO CARBOXYMETHYL CELLULOSE POLYMER BEING BEHIND AND CONTIGUOUS TO THE SILVER HALIDE EMULSION LAYER AND, DURING PROCESSING, PERMEATING SAID PHOTOSENSITIVE ELEMENT WITH AN AQUEOUS ALKALINE PROCESSING SOLUTION AND SOLUBILIZING SAID COLOR-PROVIDING SUBSTANCE FROM SAID NITRO CARBOXYMETHYL CELLULOSE LAYER.
Claim 2
Dependent Claim
132 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR WHEREIN A LATENT IMAGE CONTAINED IN AN EXPOSED GELATINO SILVER HALIDE EMULSION LAYER OF A PHOTOSENSITIVE ELEMENT IS DEVELOPED TO PROVIDE AN IMAGEWISE DISTRIBUCOLOR-PROVIDING SUBSTANCES BEING SELECTED FROM THE GROUP CONSISTING OF COLOR COUPLERS AND DYES, AND SAID IMAGEWISE DISTRIBUTION OF COLOR-PROVIDING SUBSTANCES IS TRANSFERRED BY AN ALKALINE AQUEOUS PROCESSING SOLUTION TO A SUPERPOSED IMAGE-RECEIVING ELEMENT TO IMPART TO SAID IMAGE-RECEIVING ELEMENT A POSITIVE COLORED IMAGE, THE IMPROVEMENT OF DISPOSING THE COLOR-PROVIDING SUBSTANCE IN A LAYER OF NITRO CARBOXXYMETHYL CELLULOSE POLYMER, SAID LAYER OF NITRO CARBOXYMETHYL CELLULOSE POLYMER BEING BEHIND AND CONTIGUOUS TO THE SILVER HALIDE EMULSION LAYER AND, DURING PROCESSING, PERMEATING SAID PHOTOSENSITIVE ELEMENT WITH AN AQUEOUS ALKALINE PROCESSING SOLUTION AND SOLUBILIZING SAID COLOR-PROVIDING SUBSTANCE FROM SAID NITRO CARBOXYMETHYL CELLULOSE LAYER.
References Cited (Backward Citations)
US2647049A
Cited
US2544902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |