Patent US4447512A successfully refreshed from Google Patents.
US4447512A
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Method for making a negative working lithographic printing plate
Assignee: Polychrome Corp
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Filing: 1982-01-25
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Granted: 1984-05-08
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Expires: 2002-01-25
Abstract
Abstract An O-epoxyalklyated tetrakis (hydroxyphenyl) alkane resin or the esterified reaction product of about one equivalent thereof with less than one equivalent of an ethylentically unsaturated organic acid can be combined with an aqueous alkali- and radiation sensitive, negative acting substance which when coated on a substrate forms a radiation sensitive negative working element.
Inventors
- 👤 William Rowe
- 👤 Eugene Golda
- 👤 Alan Wilkes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:30
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/016; G03F7/021; G03F7/0212; G03F7/0217; G03F7/008; G03F7/012; G03F7/0125; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/111
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
47 words
A radiation sensitive, negative acting composition comprising (1) an aqueous alkali- and radiation sensitive, negative acting diazonium compound and (2) an O-epoxyalkylated tetrakis (hydroxyphenyl) alkane resin or the esterified reaction product of about one equivalent thereof with less than one equivalent of an ethylentically unsaturated organic acid.
Claim 2
Dependent Claim
47 words
A radiation sensitive, negative acting composition comprising (1) an aqueous alkali- and radiation sensitive, negative acting diazonium compound and (2) an O-epoxyalkylated tetrakis (hydroxyphenyl) alkane resin or the esterified reaction product of about one equivalent thereof with less than one equivalent of an ethylentically unsaturated organic acid.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein said esterified reaction product further comprises a saturated organic acid.
Claim 4
Dependent Claim
22 words
The composition according to claim 2 wherein the unsaturated and saturated organic acids each contain from 3 to about 24 carbon atoms.
Claim 5
Dependent Claim
23 words
The composition according to claim 3 wherein each of said acids is selected from the group consisting of carboxylic, sulfonic and phosphonic acids.
Claim 6
Dependent Claim
15 words
The composition according to claim 4 wherein each of said acids is a carboxylic acid.
Claim 7
Dependent Claim
24 words
The composition according to claim 5 wherein said unsaturated acid is selected from the group consisting of acrylic, methacrylic, cinnamic, crotonic and itaconic acids.
Claim 8
Dependent Claim
13 words
The composition according to claim 6 wherein said unsaturated acid is acrylic acid.
Claim 9
Dependent Claim
13 words
The composition according to claim 6 wherein said unsaturated acid is methacrylic acid.
Claim 10
Dependent Claim
28 words
The composition according to claim 5 wherein said saturated acid is selected from the group consisting of fatty acids containing from about 6 to about 24 carbon atoms.
Claim 11
Dependent Claim
12 words
The composition according to claim 9 wherein said acid is pelargonic acid.
Claim 12
Dependent Claim
31 words
The composition according to claim 1 wherein said O-epoxyalkylated resin has the formula ##STR2## wherein m is an integer of 0-10 and n and p are integers whose sum is 0-10.
Claim 13
Dependent Claim
19 words
The composition according to claim 11 wherein m is 0-2 and the sum of n an p is 0-2.
Claim 14
Dependent Claim
13 words
The composition according to claim 12 wherein m, n and p are 0.
Claim 15
Dependent Claim
21 words
The composition according to claim 13 wherein said reaction product comprises about 0.5 to about 0.8 equivalents of said unsaturated acid.
Claim 16
Dependent Claim
21 words
The composition according to claim 14 wherein said reaction product comprises about 0.7 to about 0.8 equivalents of said unsaturated acid.
Claim 17
Dependent Claim
23 words
The composition according to claim 15 wherein said reaction product further comprises about 0.3 to about 0.1 equivalents of a saturated organic acid.
Claim 18
Dependent Claim
25 words
A radiation-sensitive, negative-working, element comprising a substrate having coated on at least one surface thereof a radiation-sensitive, composition according to claim 1 or claim 2.
Claim 19
Dependent Claim
27 words
A lithographic printing plate comprising an element according to claim 17 wherein the substrate comprises a lithographically suitable support material which has been imagewise exposed and developed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |