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US3712811A Expired / Lapsed US ⏱️ 0.0 years remaining

Electrophotographic material

Assignee: Panasonic Holdings Corp
•
Filing: 1971-03-05
•
Granted: 1973-01-23
•
Expires: 1991-03-05
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Abstract

Abstract AN ELECTROPHOTOGRAPHIC MATERIAL IS PROVED HEREIN WHICH COMPRISES A CONDUCTIVE SUPPORT LAYER AND A PHOTOCONDUCTIVE INSULATING LAYER, THE LATTER LAYER COMPRISING A PHOTOCONDUCTIVE POLYMERIC COMPOUND SUCH AS POLY-NVINYLCARBAZOLE, AND A SENSITIZER HAVING THE FOLLOWING GENERAL FORMULA (X<((R1-)C=C(-R2)-C(=C(-R4)(-B))-(5-R3-1,2-PHENYLENE)-))+ ANION (-) WHEREIN B REPRESENTS A RADICAL SELECTED FROM THE GROUP CONSISTING OF 2-R5,3-R6,6-R7-BENZOPYR-3-YLIUM AND X<(=C(-)-C(-R8)=C( 4-(H3C-O-)PHENYL)-(1,2-PHENYLENE)-) COMPOUNDS FALLING UNDER THE LATTER GENERAL FORMULA INCLUDE SUCH COMPOUNDS AS 2-PHENYL-4- (2''-PHENYL-4''-BENZOPYRANYLIDENE) BENZYL!-BENZOPYRYLIUM PERCHLORATE AND 2,3PHENYL-4- (2''-PHENYL-4''BENZOPYRANYLIDENE)BENZYL!-6METHYLBENZOPYRYLIUM PERCHLORATE.

Inventors

  • 👤 Y Murakami
  • 👤 Y Hasegawa
  • 👤 K Morimoto

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 00:06
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067; G03G5/0622; G03G5/0644; G03G5/0661

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) 1976-01-23 1976-07-24 1977-01-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-01-23 1980-07-24 1981-01-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-01-23 1984-07-24 1985-01-23 $7700.00 Window Closed / Lapsed

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