US3239338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic process
Assignee: Polaroid Corp
•
Filing: 1961-03-06
•
Granted: 1966-03-08
•
Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:48
CPC Classifications
G; G03; G03C; G03C8/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR WHEREIN AN EXPOSED SILVER HALIDE EMULSION IS DEVELOPED IN THE PRESENCE OF A DYE DEVELOPER TO PROVIDE A PREDETERMINED DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER, SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A DYE AND A SILVER HALIDE DEVELOPING AGENT, AND WHEREIN AT LEAST PART OF SAID DISTRIBUTION OF SAID UNOXIDIZED DYE DEVELOPER IS TRANSFERRED FROM SAID EMULSION TO A SUPERPOSED IMAGE-RECEIVING LAYER TO PROVIDE A DYE IMAGE THEREON, THE IMPROVEMENT WHICH COMPRISES INCREASING THE STABILITY OF SAID DYE IMAGE WHEN IT IS FORMED ON AN IMAGE-RECEIVING LAYER WHICH COMPRISES A FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL ALCOHOL COPOLYMERS AND DERIVATIVES OF POLYVINYL ALCOHOL HAVING UNREACTED HYDROXY GROUPS, BY TREATING SAID DYE IMAGES, SUBSEQUENT TO THEIR KFORMATION, WITH A BORON COMPOUND WHICH FORMS A BORATE ION IN AQUEOUS SOLUTION.
Claim 2
Dependent Claim
145 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR WHEREIN AN EXPOSED SILVER HALIDE EMULSION IS DEVELOPED IN THE PRESENCE OF A DYE DEVELOPER TO PROVIDE A PREDETERMINED DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER, SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A DYE AND A SILVER HALIDE DEVELOPING AGENT, AND WHEREIN AT LEAST PART OF SAID DISTRIBUTION OF SAID UNOXIDIZED DYE DEVELOPER IS TRANSFERRED FROM SAID EMULSION TO A SUPERPOSED IMAGE-RECEIVING LAYER TO PROVIDE A DYE IMAGE THEREON, THE IMPROVEMENT WHICH COMPRISES INCREASING THE STABILITY OF SAID DYE IMAGE WHEN IT IS FORMED ON AN IMAGE-RECEIVING LAYER WHICH COMPRISES A FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL ALCOHOL, POLYVINYL ALCOHOL COPOLYMERS AND DERIVATIVES OF POLYVINYL ALCOHOL HAVING UNREACTED HYDROXY GROUPS, BY TREATING SAID DYE IMAGES, SUBSEQUENT TO THEIR KFORMATION, WITH A BORON COMPOUND WHICH FORMS A BORATE ION IN AQUEOUS SOLUTION.
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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) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |