US3552315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offset master for imaging by diffusion transfer with nucleating agent, cadium salt and a salt of zirconium, thorium or titanium
Assignee: AB Dick Co
•
Filing: 1966-02-14
•
Granted: 1971-01-05
•
Expires: 1986-02-14
Abstract
Abstract The preparation of an offset master for imaging to provide an oleophilic ink receptive image by diffusion transfer from an exposed silver halide negative in which the offset master has a surface which is water insoluble, water receptive, hydrophilic and lithographic and in which the lithographic surface is provided with one or more coatings providing the combination of a nucleating agent, a water soluble salt of cadmium and a water soluble salt of a metal selected from the group consisting of zirconium, thorium and titanium and in which the cadmium salt may be placed in whole or in part with an antioxidant.
Inventors
- 👤 Mary K Ormsbee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:22
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/07
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
17 words
An offset master as claimed in claim 1 in which the nucleating agent comprises a stannous halide.
Claim 2
Dependent Claim
26 words
An offset master as claimed in claim 2 in which the stannous halide, the zirconium salt and the cadmium salt are present in the same coating.
Claim 3
Dependent Claim
23 words
An offset master as claimed in claim 2 in which the stannous halide, zirconium salt and cadmium salt are present in separate coatings.
Claim 4
Dependent Claim
46 words
An offset master as claimed in claim 2 in which the salts are present in the ratio of 1 part by weight of the stannous salt to 1.7 to 3.5 parts by weight of zirconium salt and 0.02 to 0.2 parts by weight of cadmium salt.
Claim 5
Dependent Claim
33 words
An offset master as claimed in claim 2 in which the salts are present on the lithographic surface in a coating weight within the range of 0.1 to 4 grams per square meter.
Claim 6
Dependent Claim
30 words
An offset master as claimed in claim 2 in which the salts are present on the lithographic surface in a coating weight of 0.5 to 3 grams per square meter.
Claim 7
Dependent Claim
23 words
An offset master as claimed in claim 1 which includes a film of plastic material as a cover over the coated lithographic surface.
References Cited (Backward Citations)
US2352014A
Cited
US2814988A
Cited
BE565696A
Cited
US3220837A
Cited
GB830623A
Cited
GB856770A
Cited
US3169065A
Cited
US3309990A
Cited
US3311473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |