US3969238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid developer for electrophotography and process for developing latent images
Assignee: Canon Inc
•
Filing: 1973-08-10
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Granted: 1976-07-13
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Expires: 1993-08-10
Abstract
Abstract A liquid developer for electrophotography and a process for developing latent images using the liquid developer. The liquid developer comprises a highly insulating carrier liquid, a toner particle dispersed therein, and a copolymer produced from at least one member selected from the monomers of the formula (1) and at least one member selected from the monomers of the formula (2) or a copolymer produced from at least one member selected from the monomers of the formula (1), at least one member selected from the monomers of the formula (2) and at least one member selected from the monomers of the formula (3). ##EQU1##
Inventors
- 👤 Terukuni Tsuneda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:50
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
58 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula ( 1) and at least one member selected from the monomers of the formula (2): General formula (1) ##EQU3## General formula (2) ##EQU4## Or ##EQU5##
Claim 2
Dependent Claim
58 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula ( 1) and at least one member selected from the monomers of the formula (2): General formula (1) ##EQU3## General formula (2) ##EQU4## Or ##EQU5##
Claim 3
Dependent Claim
35 words
A liquid developer for electrophotography according to claim 1 in which the addition polymer is dissolved in the carrier solution in the range of 0.1 to 10 g. per one litre of the carrier liquid.
Claim 4
Dependent Claim
23 words
A liquid developer for electrophotography according to claim 1 in which the monomer of the general formula (2) is as shown below: ##EQU6##
Claim 5
Dependent Claim
23 words
A liquid developer for electrophotography according to claim 1 in which the monomer of the general formula (2) is as shown below: ##EQU7##
Claim 6
Dependent Claim
23 words
A liquid developer for electrophotography according to claim 1 in which the monomer of the general formula (2) is as shown below: ##EQU8##
Claim 7
Dependent Claim
55 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1) and at least one member selected from the monomers of the formula (2): General formula (1) ##EQU9## General formula (2) ##EQU10##
Claim 8
Dependent Claim
55 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1) and at least one member selected from the monomers of the formula (2): General formula (1) ##EQU9## General formula (2) ##EQU10##
Claim 9
Dependent Claim
59 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1), at least one member selected from the monomers of the formula (2) and at least one member selected from the monomers of the formula (3):
Claim 10
Dependent Claim
59 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1), at least one member selected from the monomers of the formula (2) and at least one member selected from the monomers of the formula (3):
Claim 11
Dependent Claim
4 words
General formula (1) ##EQU11##
Claim 12
Dependent Claim
4 words
General formula (1) ##EQU11##
Claim 13
Dependent Claim
4 words
General formula (2) ##EQU12##
Claim 14
Dependent Claim
4 words
General formula (2) ##EQU12##
Claim 15
Dependent Claim
2 words
Or ##EQU13##
Claim 16
Dependent Claim
2 words
Or ##EQU13##
Claim 17
Dependent Claim
4 words
General formula (3) ##EQU14##
Claim 18
Dependent Claim
4 words
General formula (3) ##EQU14##
Claim 19
Dependent Claim
42 words
A liquid developer for electrophotography according to calim 7 wherein a addition polymer comprising the monomers of general formulae (1), (2) and (3) is dissolved within the range of 0.015 g - 1 g per 1 l of highly insulating carrier liquid.
Claim 20
Dependent Claim
42 words
A liquid developer for electrophotography according to calim 7 wherein a addition polymer comprising the monomers of general formulae (1), (2) and (3) is dissolved within the range of 0.015 g - 1 g per 1 l of highly insulating carrier liquid.
Claim 21
Dependent Claim
23 words
A liquid developer for electrophotography according to claim 7 wherein the monomer of the general formula (2) is as shown below: ##EQU15## ##EQU16##
Claim 22
Dependent Claim
22 words
A liquid developer for electrophotography according to claim 7 wherein the monomer of the general formula (2) is as shown below: ##EQU17##
Claim 23
Dependent Claim
22 words
A liquid developer for electrophotography according to claim 7 wherein the monomer of the general formula (2) is as shown below: ##EQU18##
Claim 24
Dependent Claim
73 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid containing therein an addition polymer comprising at least one member selected from the monomers of the general formula (1), at least one member selected from the monomers of the general formula (2) and at least one member selected from the monomers of the general formula (3): General formula (1) ##EQU19## General formula (2) ##EQU20## General formula (3) ##EQU21##
Claim 25
Dependent Claim
73 words
A liquid developer for electrophotography comprising toner particles dispersed in a highly insulating carrier liquid containing therein an addition polymer comprising at least one member selected from the monomers of the general formula (1), at least one member selected from the monomers of the general formula (2) and at least one member selected from the monomers of the general formula (3): General formula (1) ##EQU19## General formula (2) ##EQU20## General formula (3) ##EQU21##
Claim 26
Dependent Claim
77 words
An electrophotographic developing method which comprises treating a surface with a latent image formed thereon with a liquid developer for electrophotography comprising toner particles dispersed in a carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1) and at least one member selected from the monomers of formula (2) to thereby make the latent image visible: General formula (1) ##EQU22## General formula (2) ##EQU23## Or ##EQU24##
Claim 27
Dependent Claim
77 words
An electrophotographic developing method which comprises treating a surface with a latent image formed thereon with a liquid developer for electrophotography comprising toner particles dispersed in a carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1) and at least one member selected from the monomers of formula (2) to thereby make the latent image visible: General formula (1) ##EQU22## General formula (2) ##EQU23## Or ##EQU24##
Claim 28
Dependent Claim
94 words
An electrophotographic developing method which comprises treating a surface with a latent image formed thereon with a liquid developer for electrophotography comprising toner particles dispersed in a carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1), at least one member selected from the monomers of the formula (2) and at least one member selected from the monomers of the formula (3) to thereby make the latent image visible: General formula (1) ##EQU25## General formula (2) ##EQU26## Or ##EQU27## General formula (3) ##EQU28##
Claim 29
Dependent Claim
94 words
An electrophotographic developing method which comprises treating a surface with a latent image formed thereon with a liquid developer for electrophotography comprising toner particles dispersed in a carrier liquid having therein an addition polymer produced from at least one member selected from the monomers of the formula (1), at least one member selected from the monomers of the formula (2) and at least one member selected from the monomers of the formula (3) to thereby make the latent image visible: General formula (1) ##EQU25## General formula (2) ##EQU26## Or ##EQU27## General formula (3) ##EQU28##
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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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |