US3950595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transferring paper for electrophotography
Assignee: Canon Inc
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Filing: 1973-11-26
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Granted: 1976-04-13
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Expires: 1993-11-26
Abstract
Abstract The present invention provides transferring papers for electrophotography which contain specific polymeric compounds and which are particularly useful in transferring by electrophoresis. The specific polymeric compounds are copolymers prepared from one or more monomers represented by the formula: ##EQU1## wherein A is hydrogen or CH 3 ; and B is alkyl, and at least one monomer selected from the group of unsaturated carboxylic acids and acrylonitrile.
Inventors
- 👤 Hiroshi Tanaka
- 👤 Ikuo Soma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:49
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/002; G03G7/0026; G03G7/004; G03G7/006; G03G7/0073; G03G7/008; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24835; Y10T428/24934; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
77 words
Transfer paper for electrophotography adapted to receive a developed image by liquid developer comprising a cellulosic web containing a copolymer formed from about 55 - 95 mole percent of one or more monomers represented by the formula: ##EQU3## wherein A is hydrogen or CH 3 ; and B is alkyl, and from about 5 to 35 mole percent of one or more monomers of unsaturated carboxylic acids, and from about 0 to 10 mole percent of acrylonitrile.
Claim 2
Dependent Claim
77 words
Transfer paper for electrophotography adapted to receive a developed image by liquid developer comprising a cellulosic web containing a copolymer formed from about 55 - 95 mole percent of one or more monomers represented by the formula: ##EQU3## wherein A is hydrogen or CH 3 ; and B is alkyl, and from about 5 to 35 mole percent of one or more monomers of unsaturated carboxylic acids, and from about 0 to 10 mole percent of acrylonitrile.
Claim 3
Dependent Claim
18 words
Transfer paper according to claim 1 in which B is alkyl having not more than 10 carbon atoms.
Claim 4
Dependent Claim
20 words
Transfer paper according to claim 1 in which the glass transition temperature of the copolymer ranges from 20° to 50°C.
Claim 5
Dependent Claim
21 words
Transfer paper according to claim 1 in which the resistance to oil of the transfer paper is 1.0 - 10.0 sec.
Claim 6
Dependent Claim
24 words
Transfer paper according to claim 1 in which the unsaturated carboxylic acid is selected from acrylic acid, methacrylic acid, itaconic acid and maleic anhydride.
Claim 7
Dependent Claim
15 words
Transfer paper according to claim 1 in which the copolymer is neutralized or partly neutralized.
Claim 8
Dependent Claim
20 words
Transfer paper according to claim 1 including a water-soluble high polymer of good compatibility with and different from said copolymer.
Claim 9
Dependent Claim
16 words
Transfer paper according to claim 1 including an emulsion of a resin different from said copolymer.
Claim 10
Dependent Claim
19 words
Transfer paper according to claim 2 in which B is selected from methyl, ethyl, butyl, hexyl, octyl and 2-ethylhexyl.
Claim 11
Dependent Claim
22 words
Transfer paper according to claim 6 in which a neutralizing agent for the neutralization is sodium hydroxide, ammonia or an organic amine.
Claim 12
Dependent Claim
33 words
Transfer paper according to claim 7 in which the water-soluble high polymer is selected from polyvinyl alcohol, carboxy-methylcellulose, methylcellulose, ethylcellulose, starch, starch derivatives, casein, styrenemaleic anhydride copolymer salts, and vinyl acetate-maleic anhydride salts.
Claim 13
Dependent Claim
33 words
Transfer paper according to claim 8 in which the resin emulsion is selected from vinyl acetate series emulsion, acryl series emulsion, acrylonitrile-butadiene series emulsion, ethylene-vinyl acetate series emulsion, and vinylidene chloride series emulsion.
References Cited (Backward Citations)
US3653894A
Cited
US3674896A
Cited
US3457209A
Cited
US3682632A
Cited
US3778263A
Cited
US3702785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |