US3148061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer processes employing image receiving layers containing poly-4-vinylpyridine
Assignee: Polaroid Corp
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Filing: 1960-08-22
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Granted: 1964-09-08
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:24
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/56; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, WHEREIN A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION IS DEVELOPED IN THE PRESENCE OF A DYE DEVELOPER, SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A DYE AND A SILVER HALIDE DEVELOPER, TO PROVIDE IN SAID EMULSION A PREDETERMINED DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER AND WHEREIN AT LEAST A PORTION OF SAID DISTRIBUTION OF SAID UNOXIDIZED DYE DEVELOPER IS TRANSFERRED BY INBIBTION FROM SAID EMULSION TO AN IMAGERECEIVING LAYER IN SUPERPOSED RELATIONSHIP WITH SAID EMULSION TO IMPART TO SAID IMAGE-RECEIVING LAYER A REVERSED POSITIVE DYE IMAGE OF THE DEVELOPED IMAGE, THE STEP OF TRANSFERRING SAID DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER TO AN IMAGE-RECEIVING LAYER COMPRISING POLY-4-VINYLPYRIDINE.
Claim 2
Dependent Claim
120 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, WHEREIN A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION IS DEVELOPED IN THE PRESENCE OF A DYE DEVELOPER, SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A DYE AND A SILVER HALIDE DEVELOPER, TO PROVIDE IN SAID EMULSION A PREDETERMINED DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER AND WHEREIN AT LEAST A PORTION OF SAID DISTRIBUTION OF SAID UNOXIDIZED DYE DEVELOPER IS TRANSFERRED BY INBIBTION FROM SAID EMULSION TO AN IMAGERECEIVING LAYER IN SUPERPOSED RELATIONSHIP WITH SAID EMULSION TO IMPART TO SAID IMAGE-RECEIVING LAYER A REVERSED POSITIVE DYE IMAGE OF THE DEVELOPED IMAGE, THE STEP OF TRANSFERRING SAID DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER TO AN IMAGE-RECEIVING LAYER COMPRISING POLY-4-VINYLPYRIDINE.
References Cited (Backward Citations)
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US2448542A
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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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |