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US3674482A Expired / Lapsed US ⏱️ 0.0 years remaining

Novel photographic products and processes

Assignee: Polaroid Corp
•
Filing: 1970-07-13
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Granted: 1972-07-04
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Expires: 1990-07-13
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Abstract

Abstract A COMPOSITE FILM STRUCTURE COMPRISING A LAMINATE INCLUDING A COMMON SUPPORT CARRYING ON ONE SURFACE, IN ORDER, A LAYER CONTAINING SILVER PRECIPITATING NUCLEI, AN INERT NON-NUCLEATED POLYMERIC LAYER AND A LAYER CONTAINING PHOTOSENSITIVE SILVER HALIDE CRYSTLAS. SUBSEQUENT TO EXPOSURE AND PROCESSING, THE LAYER CONTAINING PHOTOSENSITIVE SILVER HALIDE CRYSTALS MAY BE REMOVED THEREBY PROVIDING A FILM UNIT WHEREIN A PROTECTIVE LAYER IS LOCATED OVER THE LAYER IN WHICH THE IMAGE IS FORME, I.E., THE LAYER CONTAINING THE SILVER PRECIPITATING NUCLEI. IN A PARTICULARLY PREFERRED EMBOIDMENT, AN ADDITIVE COLOR SCREEN IS EMPLOYED BETWEEN THE SUPPORT AND THE LAYER CONTAINING SILVER PRECIPITATING NUCLEI. THE DISCLOSED FILM STRUCTURE IS PARTICULARLY SUITABLE FOR USE AS MOTION PICTURE FILM.

Inventors

  • 👤 Richard J Haberlin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 23:36
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30; G03C8/42; G03C8/52

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) 1975-07-04 1976-01-03 1976-07-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-04 1980-01-03 1980-07-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-04 1984-01-03 1984-07-04 $7700.00 Window Closed / Lapsed

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