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Patent US4030923A successfully refreshed from Google Patents.
US4030923A
Expired / Lapsed
US
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Mixture of binder materials for use in connection with a charge transport layer in a photoconductor
Assignee: International Business Machines Corp
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Filing: 1975-12-11
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Granted: 1977-06-21
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Expires: 1995-12-11
Abstract
Abstract This invention relates to an improvement in photoconductive compositions of layered electrophotographic plates and related electrophotographic processes and particularly in the charge transport layer thereof which includes a tri-aryl pyrazoline compound in conjunction with a binder material wherein the improvement comprises the use of a tri-aryl pyrazoline compound and a mixture of binder materials comprising about 3 to 25% by weight acrylic resin and about 75 to 97% by weight polycarbonate.
Inventors
- 👤 Donald Lester Krause
- 👤 Kenneth Dale Presley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:11
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
An improved layered electrophotoconductive imaging element containing a conductive substrate, a charge generating layer and a charge transport layer, said charge transport layer comprising a tri-aryl pyrazoline compound having the formula: ##STR5## wherein n is zero or one, and A, A 1 and A 2 are each aryl radicals, the improvement comprising: a said charge transport layer including said tri-aryl pyrazoline compound and a mixture of binder materials comprising about 10 to 25% by weight acrylic resin and about 75 to 90% by weight polycarbonate.
Claim 2
Dependent Claim
85 words
An improved layered electrophotoconductive imaging element containing a conductive substrate, a charge generating layer and a charge transport layer, said charge transport layer comprising a tri-aryl pyrazoline compound having the formula: ##STR5## wherein n is zero or one, and A, A 1 and A 2 are each aryl radicals, the improvement comprising: a said charge transport layer including said tri-aryl pyrazoline compound and a mixture of binder materials comprising about 10 to 25% by weight acrylic resin and about 75 to 90% by weight polycarbonate.
Claim 3
Dependent Claim
31 words
The layered electrophotographic imaging element of claim 1 wherein the mixture of binder materials comprises about 15 to 25% by weight acrylic resin and about 75 to 85% by weight polycarbonate.
Claim 4
Dependent Claim
42 words
The layered electrophotographic imaging element of claim 1 wherein the relative amount of tri-aryl pyrazoline compound and mixture of binder materials is about 40 to 50% by weight tri-aryl pyrazoline compound and about 50 to 60% by weight mixture of binder materials.
Claim 5
Dependent Claim
15 words
The layered electrophotographic imaging element of claim 1 wherein the tri-aryl pyrazoline compound is 1-phenyl-3-[p-diethylaminostyryl]-5-[p-diethylaminophenyl]-pyrazoline.
Claim 6
Dependent Claim
97 words
An improved electrophotographic process comprising the steps of negatively charging and image-wise exposing to light an electrophotographic plate comprising a conductive substrate, a charge generating layer and a charge transport layer, said charge transport layer comprising a tri-aryl pyrazoline compound having the formula: ##STR6## wherein n is zero or one, and A, A 1 and A 2 are each aryl radicals, the improvement comprising: utilizing a charge transport layer including said tri-aryl pyrazoline compound and a mixture of binder materials comprising about 10 to 25% by weight acrylic resin and about 75 to 90% by weight polycarbonate.
Claim 7
Dependent Claim
97 words
An improved electrophotographic process comprising the steps of negatively charging and image-wise exposing to light an electrophotographic plate comprising a conductive substrate, a charge generating layer and a charge transport layer, said charge transport layer comprising a tri-aryl pyrazoline compound having the formula: ##STR6## wherein n is zero or one, and A, A 1 and A 2 are each aryl radicals, the improvement comprising: utilizing a charge transport layer including said tri-aryl pyrazoline compound and a mixture of binder materials comprising about 10 to 25% by weight acrylic resin and about 75 to 90% by weight polycarbonate.
Claim 8
Dependent Claim
29 words
The electrophotographic process of claim 5 wherein the mixture of binder material comprises about 15 to 25% by weight acrylic resin and about 75 to 85% by weight polycarbonate.
Claim 9
Dependent Claim
40 words
The electrophotographic process of claim 5 wherein the relative amount of tri-aryl pyrazoline compound and mixture of binder materials is about 40 to 50% by weight tri-aryl pyrazoline compound and about 50 to 60% by weight mixture of binder materials.
Claim 10
Dependent Claim
13 words
The electrophotographic process of claim 5 wherein the tri-aryl pyrazoline compound is 1-phenyl-3-[p-diethylaminostryrl]-5-[p-diethylaminophenyl]-pyrazoline.
Claim 11
Dependent Claim
67 words
An improved charge transport layer for use in a photoconductive system comprising a tri-aryl pyrazoline compound having the formula: ##STR7## wherein n is zero or one, and A, A 1 and A 2 are each aryl radicals, the improvement comprising: incorporating with said tri-aryl pyrazoline compound a mixture of binder materials comprising about 10 to 25% by weight acrylic resin and 75 to 90% by weight polycarbonate.
Claim 12
Dependent Claim
67 words
An improved charge transport layer for use in a photoconductive system comprising a tri-aryl pyrazoline compound having the formula: ##STR7## wherein n is zero or one, and A, A 1 and A 2 are each aryl radicals, the improvement comprising: incorporating with said tri-aryl pyrazoline compound a mixture of binder materials comprising about 10 to 25% by weight acrylic resin and 75 to 90% by weight polycarbonate.
Claim 13
Dependent Claim
30 words
The charge transport layer of claim 9 wherein the mixture of binder material comprises about 15 to 25% by weight acrylic resin and about 75 to 85% by weight polycarbonate.
Claim 14
Dependent Claim
42 words
The charge transport layer of claim 9 wherein the relative amount of tri-aryl pyrazoline compound and mixture of binder materials is about 40 to 50% by weight tri-aryl pyrazoline compound and the about 50 to 60% by weight mixture of binder materials.
Claim 15
Dependent Claim
14 words
The charge transport layer of claim 9 wherein the tri-aryl pyrazoline compound is 1-phenyl-3-[p-diethylaminostyryl]-5-[p-diethylaminophenyl]-pyrazoline.
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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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |