Patent US4293625A successfully refreshed from Google Patents.
US4293625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchor layer in photolithographic receptor base contains oxide surface treated titanium dioxide
Assignee: 3M Co
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Filing: 1980-10-15
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Granted: 1981-10-06
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Expires: 2000-10-15
Abstract
Abstract Photolithographic receptor sheet comprising a support having an anchor layer thereon comprising rutile crystalline titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, the major proportion of which is the oxide of silica, and a layer of hydrophilic colloidal silica overlying said anchor layer.
Inventors
- 👤 Joseph F. Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:44
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/07; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24893; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
A hydrophilic-surfaced photolithographic receptor sheet comprising a support having an anchor layer thereon, said anchor layer comprising a dispersion of rutile crystalline titanium dioxide in a binder resin, said titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, said oxide surface treatment comprising the oxides of silica and alumina, the major proportion thereof being the oxide of silica, and overlying said anchor layer a hydrophilic layer comprising hydrophilic colloidal silica, said hydrophilic layer having a coating weight of from about 200 to about 500 milligrams per square foot.
Claim 2
Dependent Claim
94 words
A hydrophilic-surfaced photolithographic receptor sheet comprising a support having an anchor layer thereon, said anchor layer comprising a dispersion of rutile crystalline titanium dioxide in a binder resin, said titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, said oxide surface treatment comprising the oxides of silica and alumina, the major proportion thereof being the oxide of silica, and overlying said anchor layer a hydrophilic layer comprising hydrophilic colloidal silica, said hydrophilic layer having a coating weight of from about 200 to about 500 milligrams per square foot.
Claim 3
Dependent Claim
15 words
The receptor sheet of claim 1 wherein said hydrophilic layer comprises substantially nonspheroidal silica particles.
Claim 4
Dependent Claim
19 words
The receptor sheet of claim 1 wherein said oxide surface treatment is at least about 15 percent by weight.
Claim 5
Dependent Claim
14 words
The receptor sheet of claim 1 wherein said anchor layer contains a colorant therein.
Claim 6
Dependent Claim
12 words
The receptor sheet of claim 4 wherein said colorant is carbon black.
Claim 7
Dependent Claim
100 words
A light-sensitive photolithographic printing plate capable of being imaged by the silver salt diffusion transfer process comprising a support having an anchor layer thereon, said anchor layer comprising a dispersion of rutile crystalline titanium dioxide in a binder resin, said titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, said oxide surface treatment comprising the oxides of silica and alumina, the major proportion thereof being the oxide of silica, and overlying said anchor layer a hydrophilic layer comprising hydrophilic colloidal silica, and overlying said hydrophilic layer a light-sensitive layer, comprising a silver halide emulsion.
Claim 8
Dependent Claim
100 words
A light-sensitive photolithographic printing plate capable of being imaged by the silver salt diffusion transfer process comprising a support having an anchor layer thereon, said anchor layer comprising a dispersion of rutile crystalline titanium dioxide in a binder resin, said titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, said oxide surface treatment comprising the oxides of silica and alumina, the major proportion thereof being the oxide of silica, and overlying said anchor layer a hydrophilic layer comprising hydrophilic colloidal silica, and overlying said hydrophilic layer a light-sensitive layer, comprising a silver halide emulsion.
Claim 9
Dependent Claim
15 words
The receptor sheet of claim 6 wherein said hydrophilic layer comprises substantially nonspheroidal silica particles.
Claim 10
Dependent Claim
19 words
The receptor sheet of claim 6 wherein said oxide surface treatment is at least about 15 percent by weight.
Claim 11
Dependent Claim
14 words
The receptor sheet of claim 6 wherein said anchor layer contains a colorant therein.
Claim 12
Dependent Claim
12 words
The receptor sheet of claim 9 wherein said colorant is carbon black.
Claim 13
Dependent Claim
113 words
A lithographic printing plate prepared by the silver salt diffusion transfer process comprising a support having an anchor layer thereon, said anchor layer comprising a dispersion of rutile crystalline titanium dioxide in a binder resin, said titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, said oxide surface treatment comprising the oxides of silica and alumina, the major proportion thereof being the oxide of silica, and overlying said anchor layer a hydrophilic layer comprising hydrophilic colloidal silica, and ink-receptive image areas on said hydrophilic layer comprising metallic silver, said metallic silver having been placed on said hydrophilic layer in an imagewise fasion by silver salt diffusion transfer.
Claim 14
Dependent Claim
113 words
A lithographic printing plate prepared by the silver salt diffusion transfer process comprising a support having an anchor layer thereon, said anchor layer comprising a dispersion of rutile crystalline titanium dioxide in a binder resin, said titanium dioxide having an oxide surface treatment of at least about 10 percent by weight, said oxide surface treatment comprising the oxides of silica and alumina, the major proportion thereof being the oxide of silica, and overlying said anchor layer a hydrophilic layer comprising hydrophilic colloidal silica, and ink-receptive image areas on said hydrophilic layer comprising metallic silver, said metallic silver having been placed on said hydrophilic layer in an imagewise fasion by silver salt diffusion transfer.
Claim 15
Dependent Claim
15 words
The receptor sheet of claim 11 wherein said hydrophilic layer comprises substantially non-spheroidal silica particles.
Claim 16
Dependent Claim
19 words
The receptor sheet of claim 11 wherein said oxide surface treatment is at least about 15 percent by weight.
Claim 17
Dependent Claim
14 words
The receptor sheet of claim 11 wherein said anchor layer contains a colorant therein.
Claim 18
Dependent Claim
12 words
The receptor sheet of claim 14 wherein said colorant is carbon black.
References Cited (Backward Citations)
US3914125A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |