§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US3849130A Expired / Lapsed US ⏱️ 0.0 years remaining

Organic photoconductive composition and electrophotographic member

Assignee: Pitney Bowes Inc
•
Filing: 1972-12-01
•
Granted: 1974-11-19
•
Expires: 1992-12-01
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract There are disclosed photoconductive insulating compositions and electrophotographic members utilizing such composition which are transfer complexes of a Lewis acid, preferably 2, 4, 7-trinitro9-fluorenone or 2, 4, 5, 7-tetranitro-9-fluoroenone combined with a dicarbazolyl compound characterized by the formula: WHEREIN R is a member selected from the group consisting of aryls, alkyls, and cycloalkyls, preferably discarbazolyl cyclobutane, and combined with a vinyl heterocyclic aromatic polymer or a vinyl polynuclear aromatic polymer which is believed to act both as a binder and a photoconductor in the combination. The preferred polymer is either a poly-N-vinyl carbazole or a halogenated poly-N-vinyl carbazole having a molecular weight high enough to impart high viscosity to the composition. The mole ratio of discarbazolyl compound to Lewis acid is from 1:0.5 to 1: 5 and preferably from 1:2 to 1:5. At mole ratios above 1:2 increased electrophotographic speed is attained.

Inventors

  • 👤 J Montillier

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 03:52
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; G03G5/09; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 17 words
A PHOTOCONDUCTIVE ELECTRICALLY INSULATING COMPOSITION COMPRISING A CHARGE TRANSFER COMPLEX OF A DICARBAZOLYL COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim 17 words
A PHOTOCONDUCTIVE ELECTRICALLY INSULATING COMPOSITION COMPRISING A CHARGE TRANSFER COMPLEX OF A DICARBAZOLYL COMPOUND OF THE FORMULA:
Claim 3
Dependent Claim 12 words
The composition of claim 1 wherein said dicarbazolyl compound is dicarbazolyl cyclobutane.
Claim 4
Dependent Claim 12 words
The composition defined in claim 1 and further including a dyestuff sensitizer.
Claim 5
Dependent Claim 50 words
A photoconductive electrically insulating composition comprising a charge transfer complex of dicarbazolyl cyclobutane and 2, 4, 7-trinitro-9-fluorenone in a mole ratio of from about 1:2 to 1:5 and form 5 to 50 percent by weight of a polymer taken from the group consisting of poly-N-vinyl carbazole and halogenated poly-N-vinyl carbazole.
Claim 6
Dependent Claim 50 words
A photoconductive electrically insulating composition comprising a charge transfer complex of dicarbazolyl cyclobutane and 2, 4, 7-trinitro-9-fluorenone in a mole ratio of from about 1:2 to 1:5 and form 5 to 50 percent by weight of a polymer taken from the group consisting of poly-N-vinyl carbazole and halogenated poly-N-vinyl carbazole.
Claim 7
Dependent Claim 34 words
The composition defined in claim 4 wherein the mole ratio of dicarbazolylcyclobutane to trinitrofluorenone is from 1:3.5 to 1: 5 and said polymer comprises from 5 to 13 percent by weight of the composition.
Claim 8
Dependent Claim 12 words
The composition defined in claim 4 and further including a dyestuff sensitizer.
Claim 9
Dependent Claim 62 words
An electrophotographic member comprising an electrically conductive layer having thereon a photoconductive insulating layer, said photoconductive layer comprising a charge transfer complex of dicarbazolyl cyclobutane and 2, 4, 7-trinitro-9-fluorenone in a mole ratio of from about 1:2 to 1:5 and from 5 to 50 percent by weight of a polymer taken from the group consisting of poly-N-vinyl carbazole and halogenated poly-N-vinyl carbazole.
Claim 10
Dependent Claim 62 words
An electrophotographic member comprising an electrically conductive layer having thereon a photoconductive insulating layer, said photoconductive layer comprising a charge transfer complex of dicarbazolyl cyclobutane and 2, 4, 7-trinitro-9-fluorenone in a mole ratio of from about 1:2 to 1:5 and from 5 to 50 percent by weight of a polymer taken from the group consisting of poly-N-vinyl carbazole and halogenated poly-N-vinyl carbazole.
Claim 11
Dependent Claim 35 words
The composition defined in claim 7 wherein the mole ratio of DCC to TNF is from 1:3.5 to 1:5 and the polymer comprises from 5 to 13 percent of the photoconductive insulating layer by weight.

References Cited (Backward Citations)

US3113022A Cited
US3287120A Cited
US3484237A Cited
US3684506A Cited
US3666458A Cited
US3655378A Cited
US3661879A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-18 1978-05-20 1978-11-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-18 1982-05-20 1982-11-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-18 1986-05-20 1986-11-19 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag