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US3230082A Expired / Lapsed US ⏱️ 0.0 years remaining

Color processes and products

Assignee: Polaroid Corp
•
Filing: 1962-05-14
•
Granted: 1966-01-18
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Expires: 1982-05-14
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Abstract

No abstract record available.

Inventors

  • 👤 Edwin H Land
  • 👤 Howard G Rogers

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 10:17
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 268 words
A PROCESS OF FORMING MULTICOLOR TRANSFER IMAGES COMPRISING THE STEPS OF EXPOSING A PHOTOSENSITIVE ELEMENT COMPRISING BLUE-SENSITIVE, GREEN-SENSITIVE AND RED-SENSITIVE SILVER HALIDE EMULSION LAYERS MOUNTED ON A COMMON SUPPORT, SAID BLUE-SENSITIVE, GREEN SENSITIVE AND RED-SENSITIVE SILVER HALIDE EMULSIONS HAVING ASOCIATED THEREWITH, RESPECTIVELY, YELOW, MAGENTA AND CYAN DYE DEVELOPERS, EACH OF SAID YELLOW, MAGENTA AND CYAN DYE DEVELOPERS BEING A COMPOUND WHICH IS BOTH A SILVER HALIDE DEVELOPING AGENT AND A YELLOW, MAGENTA AND CYAN DYE, RESPECTIVELY, EACH OF SAID DYE DEVELOPERS BEING IN A LAYER BEHIND AND CONTIGUOUS WITH ITS RESPECTIVE SILVER HALIDE EMULSION LAYER, AT LEAST ONE OF SAID DYE DEVELOPERS BEING PRESENT IN THE FORM OF A HYDROLYZABLE DERIVATIVE THEREOF, SAID HYDROLYZABLE DERIVATIVE CONTAINING AN ESTER GROUP REMOVABLE BY ALKALINE HYDROLYSIS, APPLYING AN ALKALINE PROCESSING COMPOSITION TO SAID EXPOSED PHOTOSENSITIVE ELEMENT AND EFFECTING DEVELOPMENT OF SAID EXPOSED EMULSIONS, IMMOBILIZING SAID YELOW, MAGENTA AND CYAN DYE DEVELOPERS, SAID PHOTOSENSITIVE ELEMENT AS A RESULT OF THE DEVELOPMENT OF THEIR RESPECTIVE SILVER HALIDE EMULSIONS, HYDROLYZING AT LEAST A PORTION OF EACH SAID HYDROLYZABLE DERIVATIVE TO PROVIDE A HYDROLYZED DYE DEVELOPER WHICH IS MORE DIFFUSIBLE THAN SAID HYDROLYZABLE DERIVATIVE, FORMING AN IMAGEWISE DISTRIBUTION OF DIFFUSIBLE, UNOXIDIZED, YELLOW, MAGENTA AND CYAN DYE DEVELOPERS PRESENT IN UNDEVELOPED AREAS OF THEIR RESPECTIVE EMULSIONS AS A FUNCTION OF THE POINT-TO-POINT DEGREE OF EXPOSURE THEREOF, TRANSFERRING, BY IMBIBITION, AT LEAST A PORTION OF EACH OF SAID IMAGEWISE DISTRIBUTIONS OF DIFFUSIBLE DYE DEVELOPER TO A SUPERPOSED IMAGE-RECEIVING LAYER TO FORM A MULTICOLOR, POSITIVE DYE IMAGE, AND SEPARATING SAID IMAGE-RECEIVING LAYER FROM SAID PHOTOSENSITIVE ELEMENT AT SOME STAGE OF SAID PROCESS AFTER SAID TRANSFER HAS BEEN EFFECTED.

References Cited (Backward Citations)

US2193574A Cited
US2756142A Cited
US2968554A Cited
US2860974A Cited
US3077402A Cited
US2983605A Cited
US2751295A Cited
US2983606A Cited
US3134672A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-01-17 1969-07-19 1970-01-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-01-17 1973-07-19 1974-01-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-01-17 1977-07-19 1978-01-18 $7700.00 Window Closed / Lapsed

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