§
Luxuse
Patent Intelligence
Sign In
Patent US3552316A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3552316A Expired / Lapsed US ⏱️ 0.0 years remaining

Dtr offset master and composition for preparation of same

Assignee: AB Dick Co
•
Filing: 1966-02-14
•
Granted: 1971-01-05
•
Expires: 1986-02-14
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An offset master adapted to be imaged to provide an ink receptive oleophilic image by diffusion transfer from an exposed silver halide negative in which the offset master is formed of a base sheet having a water soluble, water receptive, hydrophilic lithographic surface on which the image is deposited and which includes the combination on the lithographic surface of a nucleating agent for silver halide, a sensitizing dyestuff which renders more hydrophobic and ink receptive the silver image that is formed by reduction of silver halide on the lithographic surface of the master and a water soluble salt selected from the group consisting of zirconium, thorium and titanium, and which may include a cadmium salt in addition to the zirconium, thorium or titanium salt.

Inventors

  • 👤 Mary K Ormsbee

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 17:47
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/07

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 18 words
An offset master as claimed in claim 1 in which the silver halide nucleating agent is stannous halide.
Claim 2
Dependent Claim 54 words
An offset master as claimed in claim 2 in which the materials are present in the ratio of one part by weight of stannous halide, 1 to 2.5 parts by weight of the salt, and in which the dyestuff is present in an amount within the range of 0.05 to 0.1 percent by weight.
Claim 3
Dependent Claim 32 words
An offset master as claimed in claim 1 in which the dyestuff is selected from the group consisting of a phthalein dye, erythrosine dye, Eosin dye, Rose Bengal, and a Rhodamine due.
Claim 4
Dependent Claim 24 words
An offset master as claimed in claim 1 in which the composition on the lithographic surface contains in addition a water soluble cadmium salt.
Claim 5
Dependent Claim 65 words
An offset master as claimed in claim 5 in which the materials are present in the ratio of one part by weight nucleating agent, 1 to 8 parts by weight of the metal salt, and 0.01 and 0.5 parts by weight of the cadmium salt, and in which the dyestuff is present in an amount within the range of 0.001 to 1.0 percent by weight.
Claim 6
Dependent Claim 77 words
An offset master as claimed in claim 5 in which the silver halide nucleating agent is stannous halide and in which the materials are present in the ratio of one part by weight of stannous halide, 1 to 8 parts by weight of the metal salt and 0.01 to 0.5 parts by weight of the cadmium salt, and in which the dyestuff is present in an amount within the range of 0.001 to 1.0 percent by weight.
Claim 7
Dependent Claim 77 words
An offset master as claimed in claim 5 in which the silver halide nucleating agent is a stannous halide and in which the materials are present in the ratio of one part by weight of stannous halide, 1 to 2.5 parts by weight of the metal salt, 0.02 to 0.2 parts by weIght of the cadmium salt, and in which the dyestuff is present in an amount within the range of 0.05 to 0.1 percent by weight.
Claim 8
Dependent Claim 17 words
An offset master as claimed in claim 5 in which the materials are present in separate coatings.

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

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag