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US3817749A Expired / Lapsed US ⏱️ 0.0 years remaining

Photoconductive substituted poly(1-vinyl-2-phenylbenzimidazoles)

Assignee: Canon Inc
•
Filing: 1971-12-29
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Granted: 1974-06-18
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Expires: 1991-12-29
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Abstract

Abstract A POLY(1-VINYL-2-PHENYLBENZIMIDAZOLE) HAVING THE FOLLOWING FORMULA -(CH(-(BENZIMIDAZOL-1,2-YLENE)-(2-X1-1,4-PHENYLENE)-X2)- CH2)N- WHEREIN X1 AND X2 EACH REPRESENT A HYDROGEN ATOM OR A HYDROGEN ATOM AND N WHICH SHOWS THE POLYMERIZATION DEGREE, IS AN INTEGER LARGER THAN 1, OR A POLY(1-VINYL-2-(4''SUBSTITUTED AMINOPHENYL) BENZIMIDAZOLE) HAVING THE FOLLOWING FORMULA -(CH(-(BENZIMIDAZOL-1,2-YLENE)-(1,4-PHENYLENE)-N(-R1)-R2)- CH2)N- WHEREIN R1 AND R2 EACH REPRESENT AN ALKYL GROUP, AN ARYL GROUP, AN ARALKYL GROUP, OR R1 AND R2 MAY FORM A CYCLIC AMINO GROUP OR A HETEROCYCLIC AMINO GROUP TOGETHER WITH A NITROGEN ATOM HAS A FILM-FORMING PROPERTY AND A HIGH PHOTOSENSITIVITY AND THUS IS SUITABLY USED AS A PHOTOSENSITIVE MATERIAL FOR ELECTROPHOTOGRAPHIC PHOTOSENSITIVE ELEMENTS.

Inventors

  • 👤 M Kitahara
  • 👤 M Dohi
  • 👤 S Ishikawa
  • 👤 T Arita

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 18:12
CPC Classifications
C; C08; C08F; C08F226/00; C08F226/06

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) 1977-06-17 1977-12-17 1978-06-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-17 1981-12-17 1982-06-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-17 1985-12-17 1986-06-18 $7700.00 Window Closed / Lapsed

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