Patent US2559643A successfully refreshed from Google Patents.
US2559643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic product and process
Assignee: Polaroid Corp
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Filing: 1948-02-19
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Granted: 1951-07-10
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Expires: 1968-02-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:45
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE PROCESS OF FORMING POSITIVE IMAGES IN COLOR WHICH COMPRISES, DEVELOPING A LATENT NEGATIVE IMAGE IN A SILVER HALIDE EMULSION LAYER OF A PHOTOSENSITIVE ELEMENT WITH A COLOR-FORMING DEVELOPING AGENT DISSOLVED IN AN AQUEOUS ALKALINE LIQUID WHICH IS ABSORBED INTO SAID PHOTOSENSITIVE ELEMENT AND IS UNIFORMLY DISTRIBUTED THROUGHOUT SAID EMULSION LAYER AND DISSOLVING COUPLER MATERIAL, REACTABLE WITH OXIDIZED DEVELOPING AGENT TO FORM IMAGE DYE, IN LIQUID WHICH HAS BEEN ABSORBED INTO SAID PHOTOSENSITIVE ELEMENT AFTER SAID ABSORPTION HAS OCCURRED WHEREBY TO EFFECT THE FORMATION OF A DYE IMAGE IN SITU WITH A SILVER IMAGE DEVELOPED BY DEVELOPING AGENT DISTRIBUTED IN SAID EMULSION LAYER WHILE PROVIDING IN SAID EMULSION LAYER AN IMAGEWISE DISTRIBUTION OF UNREACTED DEVELOPING AGENT AND UNREACTED COUPLER MATERIAL; TRANSFERRING FROM SAID EMULSION LAYER BY IMBIBITION AT LEAST PART OF SAID IMAGEWISE DISTRIBUTION OF UNREACTED DEVELOPING AGENT AND UNREACTED COUPLER MATERIAL TO AN IMAGE-CARRYING LAYER SUPERPOSED WITH SAID PHOTOSENSITIVE ELEMENT
Claim 2
Dependent Claim
151 words
THE PROCESS OF FORMING POSITIVE IMAGES IN COLOR WHICH COMPRISES, DEVELOPING A LATENT NEGATIVE IMAGE IN A SILVER HALIDE EMULSION LAYER OF A PHOTOSENSITIVE ELEMENT WITH A COLOR-FORMING DEVELOPING AGENT DISSOLVED IN AN AQUEOUS ALKALINE LIQUID WHICH IS ABSORBED INTO SAID PHOTOSENSITIVE ELEMENT AND IS UNIFORMLY DISTRIBUTED THROUGHOUT SAID EMULSION LAYER AND DISSOLVING COUPLER MATERIAL, REACTABLE WITH OXIDIZED DEVELOPING AGENT TO FORM IMAGE DYE, IN LIQUID WHICH HAS BEEN ABSORBED INTO SAID PHOTOSENSITIVE ELEMENT AFTER SAID ABSORPTION HAS OCCURRED WHEREBY TO EFFECT THE FORMATION OF A DYE IMAGE IN SITU WITH A SILVER IMAGE DEVELOPED BY DEVELOPING AGENT DISTRIBUTED IN SAID EMULSION LAYER WHILE PROVIDING IN SAID EMULSION LAYER AN IMAGEWISE DISTRIBUTION OF UNREACTED DEVELOPING AGENT AND UNREACTED COUPLER MATERIAL; TRANSFERRING FROM SAID EMULSION LAYER BY IMBIBITION AT LEAST PART OF SAID IMAGEWISE DISTRIBUTION OF UNREACTED DEVELOPING AGENT AND UNREACTED COUPLER MATERIAL TO AN IMAGE-CARRYING LAYER SUPERPOSED WITH SAID PHOTOSENSITIVE ELEMENT
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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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |