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US3677753A Expired / Lapsed US ⏱️ 0.0 years remaining

Novel photographic processes

Assignee: Polaroid Corp
•
Filing: 1970-07-13
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Granted: 1972-07-18
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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 A LAYER CONTAINING SILVER PRECIPITATING NUCLEI AND A LAYER CONTAINING PHOTOSENSITIVE SILVER HALIDE CRYSTALS, WHEREIN SAID LAYER CONTAINING PHOTOSENSITIVE SILVER HALIDE CRYSTALS IS LOCATED DISTAL TO SAID SUPPORT; IS EXPOSED TO ACTINIC RADIATION AND PROCESSED BY CONTACTING WITH A PROCESSING COMPOSITION WHEREBY A TRANSFER IMAGE IS FORMED IN SAID LAYER CONTAINING SILVER PRECIPITATING NUCLEI, AND, SUBSEQUENT TO SAID IMAGE FORMATION, THE LAYER CONTAINING PHOTOSENSITIVE SILVER HALIDE IS REMOVED BY CONTACTING SAID LAYER WITH A ROTATING ROLLER HAVING COATED THEREON A MATERIAL HAVING A GREATER ADHESION FOR SAID LAYER THAN ADJACENT LAYERS ON SAID FILM STRUCTURE HAS FOR SAID LAYER. THE FILM UNIT PREFERABLY CONTAINS AN ADDITIVE COLOR SCREEN. THE DESCRIBED FILM STRUCTURE IS PARTICULARLY SUITABLE FOR USE AS MOTION PICTURE FILM.

Inventors

  • 👤 Donald R Francis
  • 👤 Richard J Haberlin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 09:09
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) 1975-07-18 1976-01-17 1976-07-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-07-18 1980-01-17 1980-07-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-07-18 1984-01-17 1984-07-18 $7700.00 Window Closed / Lapsed

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