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US3227552A Expired / Lapsed US ⏱️ 0.0 years remaining

Preparation of photographic direct positive color images

Assignee: Eastman Kodak Co
•
Filing: 1964-08-27
•
Granted: 1966-01-04
•
Expires: 1984-08-27
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Abstract

No abstract record available.

Inventors

  • 👤 Keith E Whitmore

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 06:23
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G01; G01C; G01C19/00; G01C19/02; G01C19/40; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3014; G03C7/00; G03C7/30; G03C7/3022; G03C8/10; G03C8/12; Y; Y10; Y10S; Y10S430/00; Y10S430/142

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 119 words
A COLOR PHOTOGRAPHIC DIFFUSION TRANSFER PROCESS WHICH COMPRISES EXPOSING A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING SUPERPOSED THEREON RED, GREEN AND BLUE LIGHT-SENSITIVE DIRECT POSITIVE SILVER HALIDE EMULSION LAYERS WHEREIN THE SILVER HALIDE FORMS LATENT IMAGES PREDOMINANTLY INSIDE THE SILVER HALIDE GRAINS, INTEGRAL WITH SAID ELEMENT AND CONTIGUOUS TO SAID EMULSION LAYERS, RESPECTIVELY, A CYAN DYE-FORMING COUPLER, A MAGENTA DYE-FORMING COUPLER AND A YELLOW DYE-FORMING COUPLER, SAID COUPLERS BEING NONDIFFUSIBLE DURING DEVELOPMENT IN AN ALKALINE COLOR DEVELOPING COMPOSITION CONTAINING AN AROMATIC PRIMARY AMINO COLOR DEVELOPING AGENT, CAPABLE OF FORMING DIFFUSIBLE ACID DYES IN SAID ALKALINE COLOR DEVELOPING SOLUTION BY REACTION WITH OXIDATION PRODUCT OF SAID COLOR DEVELOPING AGENT AND HAVING A FORMULA SELECTED FROM THE GROUP CONSISTING OF

References Cited (Backward Citations)

US2309492A Cited
US2563785A Cited
US2588982A Cited
US2701197A Cited
US2756142A Cited
BE570272A Cited
US2930694A Cited
US2940849A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1969-01-03 1969-07-05 1970-01-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1973-01-03 1973-07-05 1974-01-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1977-01-03 1977-07-05 1978-01-04 $7700.00 Window Closed / Lapsed

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