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US3690872A Expired / Lapsed US ⏱️ 0.0 years remaining

Photographic developing process with amino hydroxy cycloalkenone

Assignee: Eastman Kodak Co
•
Filing: 1970-12-02
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Granted: 1972-09-12
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Expires: 1990-12-02
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Abstract

Abstract PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENTS WHICH ARE AMINO HYDROXY CYCLOALKENONE COMPOUNDS HAVING A FIVE OR SIX MEMBER CYCLOALKENE NUCLEUS PROVIDE INCREASED DEVELOPMENT ACTIVITY, E.G. REDUCED DEVELOPMENT TIME, AND PROVIDE LOW-COLORED OXIDATION PRODUCTS WITHOUT UNDESIRED SENSITOMETRIC PROPERTIES IN DEVELOPING A LATENT IMAGE IN A PHOTOGRAPHIC ELEMENT. THESE DEVELOPING AGENTS CAN BE EMPLOYED IN PHOTOGRAPHIC ELEMENTS AND/OR PROCESSING COMPOSITIONS. THEY CAN BE EMPLOYED IN COMBINATION WITH OTHER SILVER HALIDE DEVELOPING AGENTS AND ADDENDA EMPLOYED IN PHOTOGRAPHIC ELEMENTS AND/OR PROCESSING COMPOSITIONS. THEY ARE SUITABLE, FOR INSTANCE, IN ELEMENTS FOR DRY PROCESSING WITH HEAT, AND/OR PROCESSING SOLUTIONS AND/OR PHOTOGRAPHIC EMULSIONS.

Inventors

  • 👤 Rolf S Gabrielsen
  • 👤 Ismael A Olivares

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 13:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49827; G03C1/005; G03C1/06; G03C1/42; G03C5/00; G03C5/26; G03C5/29; G03C5/30

Claims Analysis

Total Claims: 0
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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) 1975-09-12 1976-03-13 1976-09-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-12 1980-03-13 1980-09-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-12 1984-03-13 1984-09-12 $7700.00 Window Closed / Lapsed

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