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US3832173A Expired / Lapsed US ⏱️ 0.0 years remaining

Novel photographic products and processes

Assignee: Polaroid Corp
•
Filing: 1972-12-12
•
Granted: 1974-08-27
•
Expires: 1992-12-12
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Abstract

Abstract LAYER HAVING ASSOCIATED THEREWITH DIFFUSION TRANSFER PROCESS DYE IMAGE-FORMING MATERIAL DISPOSED OM THE UNIT AS A SOLID DISPERSION FORMULATED IN ACCORDANCE WITH THE PRESENT INVENTION, A LAYER ADAPTED TO ECEIVE DYE IMAGE-FORMING MATERIAL DUFFUSING THERETO; AND TO SPECIFIED PROCESSES FOR THE PRODUCTION OF AND THE EMPLOYMENT OF THE DISPERSION INCLUDING PHOTOGRAPHIC PROCESSES SUCH AS DIFFUSION TRANSFER PHOTOGRAPHIC PROCESS EMPLOYING FILM UNITS CONTAINING SUCH DISPERSIONS. THE PRESENT INVENTION RELATED TO SPECIFIED SOLID MATERIAL DISPERESIONS, PARTICULARLY TO PHOTOGRAPHIC FILM UNITS EMPLOYING SUCH DISPERSIONS AND, MORE PARTICULARLY, TO DIFFUSION TRANSFER PROCESS PHOTOGRAPHIC FILM UNITS WHICH COMPRISE A PHOTOSENSITIVE ELEMENT ADAPTED TO PROVIDE, BY DIFFUSION TRANSFER PHOTOGRAPHIC PROCESSING, SELECTIVE DYE IMAGE RECORDATION OF INCIDENT ACTINIC RADIATION AS A FUNCTION OF THE POINT-TO-POINT DEGREE OF PHOTOSENSITIVE ELEMENT EXPOSURE, WHICH FILM UNIT INCLUDES A PLURALITY OF ESSENTIAL LAYERS INCLUDING A PHOTOSENSITIVE SILVER HALIDE

Inventors

  • 👤 L Cerankowski
  • 👤 N Mattucci

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 15:18
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16

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) 1977-08-26 1978-02-25 1978-08-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-08-26 1982-02-25 1982-08-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-08-26 1986-02-25 1986-08-27 $7700.00 Window Closed / Lapsed

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