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US3730714A Expired / Lapsed US ⏱️ 0.0 years remaining

Photoresponsive articles comprising multilayer spectral sensitization systems

Assignee: Polaroid Corp
•
Filing: 1971-11-04
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Granted: 1973-05-01
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Expires: 1991-11-04
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Abstract

Abstract PHOTORESPONSE OF A GIVEN PHOTOSENSITIVE MEDIUM IS ENHANCED BY UTILIZING A SPECTRAL SENSITIZATION SYSTEM WHICH COMPRISES A LAYER OF A CYANINE SPECTRAL SENSITIZING DYE ADSORBED TO SAID PHOTOSENSITIVE MEDIUM AND, SUPERPOSED THEREOVER, AT LEAST ONE LAYER OF AN ENERGY ABSORBING AND TRANSMITTING MATERIAL WHICH POSSESSES A HIGHER INTRINSIC ENERGY ABSORPTION FREQUENCY THAN THE ENERGY ABSORPTION FREQUENCY OF THE IMMEDIATELY PRECEDING LAYER, AND AN INTRINSIC ENERGY TRANSMITTING FREQUENCY OF THE NEXT OVERLAPS THE ENERGY ABSORPTION FREQUENCY OF THE NEXT PRECEDING LAYER, THEREBY PROVIDING A RADIATIONLESS CIRCUIT CAPABLE OF TRANSMITTING PHOTON-EXCITATION-DERIVED ENERGY TO SAID PHOTOSENSITIVE MEDIUM.

Inventors

  • 👤 G Bird
  • 👤 A Rosenoff

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 15:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/09; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/28; G03C1/29; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067

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) 1976-04-30 1976-10-30 1977-05-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-30 1980-10-30 1981-05-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-30 1984-10-30 1985-05-01 $7700.00 Window Closed / Lapsed

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