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US3039869A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic color processes and compositions

Assignee: Polaroid Corp
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Filing: 1957-04-24
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Granted: 1962-06-19
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Expires: 1977-04-24
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Abstract

No abstract record available.

Inventors

  • 👤 Howard G Rogers
  • 👤 Harriet W Lutes

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 17:31
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 188 words
A PROCESS OF FORMING MULTICOLOR TRANSFER IMAGES, COMPRISING EXPOSING A PHOTOSENSITIVE ELEMENT, SAID PHOTOSENSITIVE ELEMENT COMPRISING A PLURALITY OF SILVER HALIDE EMULSIONS, EACH OF SAID SILVER HALIDE EMULSIONS HAVING ASSOCIATED THEREWITH A DYE DEVELOPER, EACH SAID DYE DEVELOPER BEING A COMPOUND WHICH IS BOTH A SILVER HALIDE DEVELOPING AGENT AND A DYE, DEVELOPING SAID EXPOSED PHOTOSENSITIVE ELEMENT, SAID DEVELOPMENT BEING EFFECTED IN THE PRESENCE OF A 3-PYRAZOLIDONE SILVER HALIDE DEVELOPING AGENT AND OF A BENZENOID SILVER HALIDE DEVELOPING AGENT, SAID BENZENOID SILVER HALIDE DEVELOPING AGENT CONTAINING AN ARYL NUCLEUS SUBSTITUTED BY AT LEAST TWO SUBSTITUENTS SELECTED FROM THE CLASS CONSISTING OF HYDROXYL AND AMINO GROUPS, ONE OF SAID SUBSTITUENTS BEING SUBSTITUTED IN ONE OF THE ORTHO AND PARA POSITIONS WITH RESPECT TO THE OTHER OF SAID SUBSTITUENTS, OXIDIZING EACH SAID DYE DEVELOPER AS A FUNCTION OF THE POINT-TO-POINT DEVELOPMENT OF THE SILVER HALIDE EMULSION WITH WHICH SAID DYE DEVELOPER IS ASSOCIATED, THEREBY PROVIDING AN IMAGEWISE DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER IN UNDEVELOPED AREAS OF EACH OF SAID EMULSIONS, AND TRANSFERRING AT LEAST A PORTION OF EACH SAID IMAGEWISE DISTRIBUTION OF UNOXIDIZED DYE DEVELOPER TO A SUPERPOSED IMAGE-RECEIVING LAYER.
Claim 2
Dependent Claim 47 words
A PROCESS AS DEFINED IN CLAIM 31, WHEREIN SAID PHOTOSENSITIVE ELEMENT CONTAINS A BLUE-SENSITIVE SILVER HALIDE EMULSION, A GREEN-SENSITIVE SILVER HALIDE EMULSION AND A RED-SENSITIVE SILVER HALIDE EMULSION, SAID EMULSION HAVING ASSOCIATED THEREWITH, RESPECTIVELY, A YELLOW DYE DEVELOPER, A MAGENTA DYE DEVELOPER AND A CYAN DYE DEVELOPER.

References Cited (Backward Citations)

US2543691A Cited
US2756142A Cited
US2774668A Cited
US2751300A Cited
US2892710A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1965-06-18 1965-12-18 1966-06-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1969-06-18 1969-12-18 1970-06-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1973-06-18 1973-12-18 1974-06-19 $7700.00 Window Closed / Lapsed

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