Patent US3615532A successfully refreshed from Google Patents.
US3615532A
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Printing plate compositions
Assignee: Union Carbide Corp
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Filing: 1963-12-09
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Granted: 1971-10-26
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Expires: 1983-12-09
Abstract
Abstract A printing plate composition comprising (1) the association product of a normally solid water-soluble ethylene oxide polymer and a heat-fusible phenolic resin, (2) a nonoxidizing acidic compound, and (3) a photosensitizing agent.
Inventors
- 👤 Julius L Silver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:58
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0381; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06; C08L71/00; C08L71/02; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/12; Y10S430/126
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
29 words
from about 10 to about 25 percent by weight, based on the phenolic resin, of a photoinsensitive, nonoxidizing acidic compound which exhibits a pH of less than 7, and
Claim 2
Dependent Claim
38 words
a photoinsensitive, nonoxidizing acidic compound which said acidic compound exhibits a pH of less than 7 and is present in an amount of from 2 to 50 weight percent based on the weight of the phenolic resin, and
Claim 3
Dependent Claim
12 words
The printing plate of claim 1 wherein the photosensitizing agent is iodoform.
Claim 4
Dependent Claim
13 words
The printing plate of claim 1 wherein the photosensitizing agent is a diazocompound.
Claim 5
Dependent Claim
41 words
photosensitizing quantities of a phOtosensitizing agent which, when acted upon by light energy at ambient temperatures, yields free radicals capable of reaction with resinous components of the composition whereby the photosensitive composition becomes more oleophilic upon exposure to the light energy.
Claim 6
Dependent Claim
49 words
either admixed with, or coated upon, said composition, photosensitizing quantities of a photosensitizing agent which, when acted upon by light energy at ambient temperatures, yields free radicals capable of reaction with resinous components of the composition whereby the photosensitive composition becomes more oleophilic upon exposure to the light energy.
Claim 7
Dependent Claim
15 words
The printing plate of claim 1 wherein the photosensitizing agent is 4,4''-diazostilbene-2,2''-disulfonic acid sodium salt.
Claim 8
Dependent Claim
18 words
A printing plate as in claim 1 in which said photosensitizing agent is admixed with said base composition.
Claim 9
Dependent Claim
18 words
A printing plate as in claim 1 in which said photosensitizing agent is coated upon said base composition.
Claim 10
Dependent Claim
9 words
A photosensitive composition consisting essentially, in intimate mixture, of
Claim 11
Dependent Claim
11 words
The composition of claim 7 wherein the photosensitizing agent is iodoform.
Claim 12
Dependent Claim
13 words
The composition of claim 7 wherein the acidic compound is a carboxylic acid.
Claim 13
Dependent Claim
12 words
The composition of claim 7 wherein the acidic compound is oxalic acid.
Claim 14
Dependent Claim
13 words
The composition of claim 7 wherein the phenolic resin is a phenol-formaldehyde resin.
Claim 15
Dependent Claim
13 words
The composition of claim 7 wherein the phenolic resin is a cresol-formaldehyde resin.
Claim 16
Dependent Claim
13 words
The composition of claim 7 wherein the phenolic resin is a resorcinol-formaldehyde resin.
Claim 17
Dependent Claim
13 words
A laminate comprising the composition of claim 7 pressed to a substrate material.
Claim 18
Dependent Claim
6 words
A photosensitive composition consisting essentially of
Claim 19
Dependent Claim
14 words
A composition as in claim 15 in which said photosensitizing agent is admixed therewith.
Claim 20
Dependent Claim
14 words
A composition as in claim 15 in which said photosensitizing agent is coated thereon.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |