US4606986A — Electrophotographic elements containing unsymmetr…

Claim 1

Independent Claim 176 words

An electrostatographic imaging member comprising a supporting substrate and a photoconductive layer comprising from about 5 percent and about 100 percent by volume of an unsymmetrical squaraine composition having the formula: ##STR6## wherein R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of alkyl radicals having 1 to 4 carbon atoms, phenyl radicals, and radicals having the formula: ##STR7## and R 3 , R 4 , R 7 and R 8 are independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CF 3 , F, Cl, Br, and COOH, wherein at least one of R 3 and R 4 are different than R 7 and R 8 if R 7 and R 8 are located on the same relative position on the aromatic ring as R 3 and R 4 and wherein R 9 is selected from the group consisting of H, alkyl radicals having from 1 to 4 carbon atoms, F, Cl, Br, COOH, CN and CF 3 .

Claim 2

Dependent Claim 176 words

An electrostatographic imaging member comprising a supporting substrate and a photoconductive layer comprising from about 5 percent and about 100 percent by volume of an unsymmetrical squaraine composition having the formula: ##STR6## wherein R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of alkyl radicals having 1 to 4 carbon atoms, phenyl radicals, and radicals having the formula: ##STR7## and R 3 , R 4 , R 7 and R 8 are independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CF 3 , F, Cl, Br, and COOH, wherein at least one of R 3 and R 4 are different than R 7 and R 8 if R 7 and R 8 are located on the same relative position on the aromatic ring as R 3 and R 4 and wherein R 9 is selected from the group consisting of H, alkyl radicals having from 1 to 4 carbon atoms, F, Cl, Br, COOH, CN and CF 3 .

Claim 3

Dependent Claim 180 words

An electrostatographic imaging member comprising a supporting substrate, a photoconductive layer comprising from about 5 percent and about 100 percent by volume of an unsymmetrical squaraine composition having the formula: ##STR8## wherein R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of alkyl radicals having 1 to 4 carbon atoms, phenyl radicals, and radicals having the formula: ##STR9## and R 3 , R 4 , R 7 and R 8 are independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CF 3 , F, Cl, Br, and COOH, wherein at least one of R 3 and R 4 are different than R 7 and R 8 if R 7 and R 8 are located on the same relative position on the aromatic ring as R 3 and R 4 and wherein R 9 is selected from the group consisting of H, alkyl radicals having from 1 to 4 carbon atoms, F, Cl, Br, COOH, CN and CF 3 , and a charge transport layer.

Claim 4

Dependent Claim 180 words

An electrostatographic imaging member comprising a supporting substrate, a photoconductive layer comprising from about 5 percent and about 100 percent by volume of an unsymmetrical squaraine composition having the formula: ##STR8## wherein R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of alkyl radicals having 1 to 4 carbon atoms, phenyl radicals, and radicals having the formula: ##STR9## and R 3 , R 4 , R 7 and R 8 are independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CF 3 , F, Cl, Br, and COOH, wherein at least one of R 3 and R 4 are different than R 7 and R 8 if R 7 and R 8 are located on the same relative position on the aromatic ring as R 3 and R 4 and wherein R 9 is selected from the group consisting of H, alkyl radicals having from 1 to 4 carbon atoms, F, Cl, Br, COOH, CN and CF 3 , and a charge transport layer.

Claim 5

Dependent Claim 47 words

An electrostatographic imaging member in accordance with claim 2 wherein said squaraine composition is dispersed in a resin binder in an amount of from about 30 percent by weight to about 50 percent by weight squaraine based on the weight of said squaraine and said resin binder.

Claim 6

Dependent Claim 20 words

An electrostatographic imaging member in accordance with claim 2 wherein said hole transport layer comprises a diamine hole transport material.

Claim 7

Dependent Claim 37 words

An electrostatographic imaging member in accordance with claim 4 wherein said diamine hole transport material is dispersed in a resinous binder in an amount of from about 10 percent by weight to about 75 percent by weight.

Claim 8

Dependent Claim 26 words

An electrostatographic imaging member in accordance with claim 5 wherein said resinous binder for said diamine hole transport material is a polycarbonate, polyester or vinyl polymer.

Claim 9

Dependent Claim 59 words

An electrostatographic imaging member in accordance with claim 4 wherein said diamine hole transport material comprises molecules of the formula: ##STR10## dispersed in a highly insulating and transport organic resinous material wherein X is selected from the group consisting of ortho (CH 3 ), meta (CH 3 ), para (CH 3 ), ortho (Cl), meta (Cl), and para (Cl).

Claim 10

Dependent Claim 17 words

An electrostatographic imaging member in accordance with claim 7 wherein said diamine hole transport material comprises N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[1,1-biphenyl]-4,4'-diamine.

Claim 11

Dependent Claim 18 words

An electrostatographic imaging member in accordance with claim 2 wherein said supporting substrate comprises an electrically conductive metal.

Claim 12

Dependent Claim 30 words

An electrostatographic imaging member in accordance with claim 2 comprising a supporting substrate, a metal oxide hole blocking layer, a photoconductive layer comprising said squaraine and a hole transport layer.

Claim 13

Dependent Claim 33 words

An electrostatographic imaging member in accordance with claim 2 comprising a supporting substrate, a metal oxide hole blocking layer, an adhesive layer, a photoconductive layer comprising said squaraine and a hole transport layer.

Claim 14

Dependent Claim 38 words

An electrostatographic imaging member in accordance with claim 2 comprising a supporting substrate, a metal oxide hole blocking layer, an adhesive layer, a photoconductive layer comprising said squaraine and a transport layer comprising a diamine hole transport material.

Claim 15

Dependent Claim 234 words

An electrostatographic imaging process comprising (a) providing an electrostatographic imaging member comprising an electrostatographic imaging memvber having an imaging surface, said imaging member comprising a supporting substrate and a photoconductive layer comprising from about 5 percent and about 100 percent by volume of an unsymmetrical squaraine composition having the formula: ##STR11## wherein R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of alkyl radicals having 1 to 4 carbon atoms, phenyl radicals, and radicals having the formula: ##STR12## and R 3 , R 4 , R 7 and R 8 are independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CF 3 , F, Cl, Br, and COOH, wherein at least one of R 3 and R 4 are different than R 7 and R 8 if R 7 and R 8 are located on the same relative position on the aromatic ring as R 3 and R 4 and wherein R 9 is selected from the group consisting of H, alkyl radicals having from 1 to 4 carbon atoms, F, Cl, Br, COOH, CN and CF 3 , (b) depositing in the dark a substantially uniform electrostatic charge on said imaging surface and (c) exposing said imaging surface to activating radiation in image configuration to selectively discharge said uniform electrostatic charge thereby forming an electrostatic latent image.

Claim 16

Dependent Claim 234 words

An electrostatographic imaging process comprising (a) providing an electrostatographic imaging member comprising an electrostatographic imaging memvber having an imaging surface, said imaging member comprising a supporting substrate and a photoconductive layer comprising from about 5 percent and about 100 percent by volume of an unsymmetrical squaraine composition having the formula: ##STR11## wherein R 1 , R 2 , R 5 and R 6 are independently selected from the group consisting of alkyl radicals having 1 to 4 carbon atoms, phenyl radicals, and radicals having the formula: ##STR12## and R 3 , R 4 , R 7 and R 8 are independently selected from the group consisting of H, CH 3 , CH 2 CH 3 , CF 3 , F, Cl, Br, and COOH, wherein at least one of R 3 and R 4 are different than R 7 and R 8 if R 7 and R 8 are located on the same relative position on the aromatic ring as R 3 and R 4 and wherein R 9 is selected from the group consisting of H, alkyl radicals having from 1 to 4 carbon atoms, F, Cl, Br, COOH, CN and CF 3 , (b) depositing in the dark a substantially uniform electrostatic charge on said imaging surface and (c) exposing said imaging surface to activating radiation in image configuration to selectively discharge said uniform electrostatic charge thereby forming an electrostatic latent image.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1989-08-18	1990-02-17	1990-08-19	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1993-08-18	1994-02-17	1994-08-19	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1997-08-18	1998-02-17	1998-08-19	$7700.00	Window Closed / Lapsed

Electrophotographic elements containing unsymmetrical squaraines

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