US4093465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive diazo condensate compositions
Assignee: Polychrome Corp
•
Filing: 1975-03-12
•
Granted: 1978-06-06
•
Expires: 1995-03-12
Abstract
Abstract Compositions comprising (I) solvent-soluble, negative-acting, light-sensitive reaction products of (a) water-soluble diazo condensation products with (b) water-insolubilizing inorganic compounds therefor and (II) synthetic, film-forming oleophilic resins, which compositions can be coated onto suitable base sheet materials to form presensitized lithographic printing plates, proofs for multi-color printing, visual aids, printed circuits and the like.
Inventors
- 👤 Simon L. Chu
- 👤 Eugene Golda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:53
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A light sensitive, solvent soluble, oleophilic film forming composition, which comprises: A. a light sensitive, light hardenable, organic solvent soluble, substantially water-insoluble reaction product of: 1. A water-soluble, light sensitive condensation product of: a. A negative acting diazonium salt of diphenylamine; and b. An organic reactive carbonyl-containing condensing compound therefore; with 2. About an equimolar amount of a water insolubilizing alkali metal thiocyanate; and B. an organic solvent soluble, substantially water insoluble epoxy resin; said composition capable of being coated onto a base sheet from solution in an organic solvent or substantially organic solvent medium to form a tack-free continuous surface; exposed to light in a predetermined area to harden the coating in such area; and removed from unexposed area by an aqueous or substantially aqueous developer.
Claim 2
Dependent Claim
127 words
A light sensitive, solvent soluble, oleophilic film forming composition, which comprises: A. a light sensitive, light hardenable, organic solvent soluble, substantially water-insoluble reaction product of: 1. A water-soluble, light sensitive condensation product of: a. A negative acting diazonium salt of diphenylamine; and b. An organic reactive carbonyl-containing condensing compound therefore; with 2. About an equimolar amount of a water insolubilizing alkali metal thiocyanate; and B. an organic solvent soluble, substantially water insoluble epoxy resin; said composition capable of being coated onto a base sheet from solution in an organic solvent or substantially organic solvent medium to form a tack-free continuous surface; exposed to light in a predetermined area to harden the coating in such area; and removed from unexposed area by an aqueous or substantially aqueous developer.
Claim 3
Dependent Claim
12 words
The composition of claim 1, wherein the inorganic compound is potassium thiocyanate.
References Cited (Backward Citations)
US2679498A
Cited
US2649373A
Cited
US3396019A
Cited
US3211553A
Cited
US3353984A
Cited
US3396020A
Cited
GB1280885A
Cited
US3679419A
Cited
US3849392A
Cited
US3847614A
Cited
US3836366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |