US4307168A
Expired / Lapsed
US
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Amplification of developed electrographic image patterns
Assignee: Eastman Kodak Co
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Filing: 1977-05-05
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Granted: 1981-12-22
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Expires: 1997-05-05
Abstract
Abstract Electrographic image patterns are developed using marking particles containing a catalyst or catalyst precursor. The developed image pattern is then amplified by contacting it with high gain chemical-redox amplification composition.
Inventors
- 👤 Mark Lelental
- 👤 Joseph Y. Kaukeinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:21
CPC Classifications
G; G03; G03G; G03G8/00; G03G13/00; G03G13/06; G03G13/08; G03G9/00; G03G9/08; G03G9/09; G03G9/0926
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
107 words
A method for amplifying a developed charge pattern residing on an insulating receiver comprising the steps of: (a) contacting a charge pattern with an electrographic developer composition comprising a carrier and marking particles having a polarity opposite that of said charge pattern thereby producing said developed charge pattern; wherein said marking particles contain a resin and a catalyst or catalyst precursor which is a metal or metal compound and said metal is selected from the metals forming groups VIII and IB of the Periodic Table including alloys and mixtures of such metals; and (b) contacting said developed charge pattern with a high gain chemical redox amplification composition.
Claim 2
Independent Claim
107 words
A method for amplifying a developed charge pattern residing on an insulating receiver comprising the steps of: (a) contacting a charge pattern with an electrographic developer composition comprising a carrier and marking particles having a polarity opposite that of said charge pattern thereby producing said developed charge pattern; wherein said marking particles contain a resin and a catalyst or catalyst precursor which is a metal or metal compound and said metal is selected from the metals forming groups VIII and IB of the Periodic Table including alloys and mixtures of such metals; and (b) contacting said developed charge pattern with a high gain chemical redox amplification composition.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein said high gain chemical-redox amplification composition is a physical development composition.
Claim 4
Dependent Claim
38 words
A method according to claim 2, wherein said carrier is a liquid and said metal is selected from the group consisting of copper, silver, cobalt, nickel, rhodium, tellurium, palladium and gold, including alloys and mixtures of such metals.
Claim 5
Dependent Claim
14 words
A method according to claim 2, wherein said marking particle also comprises a colorant.
Claim 6
Dependent Claim
38 words
A method according to claim 2, wherein said carrier is a dry material and said metal is selected from the group consisting of copper, silver, cobalt, nickel, tellurium, rhodium and palladium, including alloys and mixtures of such metals.
Claim 7
Independent Claim
109 words
A method for amplifying a developed electrographic image pattern comprising the steps of: (a) contacting a charge pattern with an electrographic developer composition comprising marking particles containing a resin and a catalyst or catalyst precursor thereby charging said particles; wherein said catalyst is a metal or metal compound and said metal is selected from the group of metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals; (b) depositing said charged particles on a receiver surface thereby forming said developed electrographic image pattern; and (c) contacting the developed image pattern while on the receiver with a high gain chemical redox amplification composition.
Claim 8
Independent Claim
109 words
A method for amplifying a developed electrographic image pattern comprising the steps of: (a) contacting a charge pattern with an electrographic developer composition comprising marking particles containing a resin and a catalyst or catalyst precursor thereby charging said particles; wherein said catalyst is a metal or metal compound and said metal is selected from the group of metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals; (b) depositing said charged particles on a receiver surface thereby forming said developed electrographic image pattern; and (c) contacting the developed image pattern while on the receiver with a high gain chemical redox amplification composition.
Claim 9
Dependent Claim
19 words
A method according to claim 6 wherein said high gain chemical redox amplification composition is a physical development composition.
Claim 10
Dependent Claim
38 words
A method according to claim 6, wherein said carrier is a liquid and said metal is selected from the group consisting of copper, silver, cobalt, nickel, rhodium, tellurium, palladium and gold, including alloys and mixtures of such metals.
Claim 11
Independent Claim
123 words
A method of amplifying a developed image pattern formed in an electrophoretic migration imaging process comprising the steps of: (a) subjecting an electrically photosensitive material positioned between at least two electrodes to an applied electric field, wherein said electrically photosensitive material contains a catalyst or catalyst precursor which is a metal or metal compound and said metal is selected from the group of metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals; (b) exposing said material to an image pattern of radiation to which the material is photosensitive, thereby obtaining a developed image pattern on at least one of said electrodes; and (c) contacting the developed image pattern with a high gain chemical-redox amplification composition.
Claim 12
Independent Claim
123 words
A method of amplifying a developed image pattern formed in an electrophoretic migration imaging process comprising the steps of: (a) subjecting an electrically photosensitive material positioned between at least two electrodes to an applied electric field, wherein said electrically photosensitive material contains a catalyst or catalyst precursor which is a metal or metal compound and said metal is selected from the group of metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals; (b) exposing said material to an image pattern of radiation to which the material is photosensitive, thereby obtaining a developed image pattern on at least one of said electrodes; and (c) contacting the developed image pattern with a high gain chemical-redox amplification composition.
Claim 13
Dependent Claim
18 words
A method according to claim 9 wherein said high gain chemical-redox amplification composition is a physical development composition.
Claim 14
Dependent Claim
31 words
A method according to claim 10, wherein said metal is selected from the groups consisting of copper, silver, cobalt, nickel, rhodium, tellurium and palladium, including alloys and mixtures of such metals.
Claim 15
Dependent Claim
48 words
An electrographic marking particle comprising an electrically photosensitive particle and a catalyst or catalyst precursor which is a metal or metal compound and said metal is selected from the group of metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals.
Claim 16
Dependent Claim
48 words
An electrographic marking particle comprising an electrically photosensitive particle and a catalyst or catalyst precursor which is a metal or metal compound and said metal is selected from the group of metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals.
Claim 17
Dependent Claim
16 words
An electrographic marking particle as in claim 12, wherein said marking particle also contains a colorant.
Claim 18
Dependent Claim
34 words
An electrographic marking particle as in claim 12, wherein said metal is selected from the group consisting of copper, silver, cobalt, nickel, rhodium, tellurium, gold and palladium, including alloys and mixtures of such metals.
Claim 19
Dependent Claim
53 words
An electrographic developer composition comprising a carrier and a marking particle containing an electrically photosensitive material and a catalyst or catalyst precursor which is a metal or metal compound, wherein said metal is selected from the metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals.
Claim 20
Dependent Claim
53 words
An electrographic developer composition comprising a carrier and a marking particle containing an electrically photosensitive material and a catalyst or catalyst precursor which is a metal or metal compound, wherein said metal is selected from the metals forming groups VIII and IB of the Periodic Table, including alloys and mixtures of such metals.
Claim 21
Dependent Claim
14 words
An electrophotographic developer as in claim 15, wherein said carrier is a dielectric liquid.
Claim 22
Dependent Claim
34 words
An electrographic developer composition as in claim 15, wherein said metal is selected from the group consisting of copper, silver, cobalt, nickel, rhodium, gold, tellurium and palladium, including alloys and mixtures of such metals.
Claim 23
Dependent Claim
40 words
An electrographic developer composition as in claim 15, wherein said carrier is a dry material and said metal is selected from the group consisting of copper, tellurium, cobalt, nickel, rhodium, gold and palladium, including alloys and mixtures of such metals.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
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