US3003872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products and processes
Assignee: Polaroid Corp
•
Filing: 1957-12-03
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Granted: 1961-10-10
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Expires: 1977-12-03
Abstract
No abstract record available.
Inventors
- 👤 Elkan R Blout
- 👤 Howard C Haas
- 👤 Howard G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:12
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
145 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, WHEREIN A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION IS DEVELOPED WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING A DYE DEVELOPER TO PROVIDE IN SAID EMULSION 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 LAST PART OF SAID DISTRIBUTION OF SAID UNOXIDIZED DYE DEVELOPER IS TRANSFERRED BY IMBITITION FROM SAID EMULSION TO AN IMAGE-RECEIVING ELEMENT IN SUPERPOSED RELATIONSHIP WITH SAID EMULSION TO IMPART TO SAID IMAGERECEIVING ELEMENT A REVERSED POSITIVE DYE IMAGE OF THE DEVELOPER IMAGE, THE IMPROVEMENT CHARACTERIZED BY THE FEATURE THAT SAID IMAGE-RECEIVING ELEMENT COMPRISES AN IMAGE-RECEIVING LAYER OF A DYEABLE MATERIAL SELECTED FROM THE CLASS CONSISTING OF (A) COPOLYMERS OF VINYL ALCOHOL AND N-VINYLPYRROLIDONE AND (B) MIXTURES OF POLYVINYL ALCOHOL AND POLY-N-VINYLPYRROLIDONE.
Claim 2
Dependent Claim
145 words
IN A PROCESS OF FORMING A PHOTOGRAPHIC IMAGE IN COLOR, WHEREIN A LATENT IMAGE CONTAINED IN AN EXPOSED SILVER HALIDE EMULSION IS DEVELOPED WITH AN AQUEOUS ALKALINE SOLUTION CONTAINING A DYE DEVELOPER TO PROVIDE IN SAID EMULSION 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 LAST PART OF SAID DISTRIBUTION OF SAID UNOXIDIZED DYE DEVELOPER IS TRANSFERRED BY IMBITITION FROM SAID EMULSION TO AN IMAGE-RECEIVING ELEMENT IN SUPERPOSED RELATIONSHIP WITH SAID EMULSION TO IMPART TO SAID IMAGERECEIVING ELEMENT A REVERSED POSITIVE DYE IMAGE OF THE DEVELOPER IMAGE, THE IMPROVEMENT CHARACTERIZED BY THE FEATURE THAT SAID IMAGE-RECEIVING ELEMENT COMPRISES AN IMAGE-RECEIVING LAYER OF A DYEABLE MATERIAL SELECTED FROM THE CLASS CONSISTING OF (A) COPOLYMERS OF VINYL ALCOHOL AND N-VINYLPYRROLIDONE AND (B) MIXTURES OF POLYVINYL ALCOHOL AND POLY-N-VINYLPYRROLIDONE.
References Cited (Backward Citations)
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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) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |