Patent US3069262A successfully refreshed from Google Patents.
US3069262A
Expired / Lapsed
US
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Processes for forming dye developer images having stability in sunlight
Assignee: Polaroid Corp
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Filing: 1958-03-27
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Granted: 1962-12-18
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Expires: 1978-03-27
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:32
CPC Classifications
G; G03; G03C; G03C8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 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 TO PROVIDE A PREDETERMINED DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER, AND AT LEAST PART OF SAID DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER IS TRANSFERRED FROM SAID EMULSION TO A SUPERPOSED IMAGE-RECEIVING LAYER TO PROVIDE A POSITIVE DYE IMAGE OF THE DEVELOPED IMAGE, SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A DYE AND A SILVER HALIDE DEVELOPING AGENT, THE IMPROVEMENT WHICH COMPRISES INCREASING THE STABILITY OF SAID POSITIVE DYE IMAGE BY CONTACTING WITH SAID POSITIVE DYE IMAGE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYROGALLOL, GALLIC ACID AND ESTERS OF GALLIC ACID.
Claim 2
Dependent Claim
123 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 TO PROVIDE A PREDETERMINED DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER, AND AT LEAST PART OF SAID DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER IS TRANSFERRED FROM SAID EMULSION TO A SUPERPOSED IMAGE-RECEIVING LAYER TO PROVIDE A POSITIVE DYE IMAGE OF THE DEVELOPED IMAGE, SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A DYE AND A SILVER HALIDE DEVELOPING AGENT, THE IMPROVEMENT WHICH COMPRISES INCREASING THE STABILITY OF SAID POSITIVE DYE IMAGE BY CONTACTING WITH SAID POSITIVE DYE IMAGE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYROGALLOL, GALLIC ACID AND ESTERS OF GALLIC ACID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |