Patent US3785825A successfully refreshed from Google Patents.
US3785825A
Expired / Lapsed
US
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Light-sensitive quinone diazide compounds,compositions,and presensitized lithographic plate
Assignee: Polychrome Corp
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Filing: 1971-07-19
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Granted: 1974-01-15
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Expires: 1991-07-19
Abstract
Abstract Light-sensitive compounds and compositions comprising alkyl ether esters of naphthoquinone diazides that resist hydrolysis during prolonged storage, and sensitized lithographic printing plates made therewith.
Inventors
- 👤 A Deutsch
- 👤 J Poppo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:36
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/022
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
11 words
A compound as defined in claim 1 wherein R is methoxy.
Claim 2
Dependent Claim
11 words
A compound as defined in claim 1 wherein R is ethoxy.
Claim 3
Dependent Claim
11 words
A compound as defined in claim 1 wherein R is butoxy.
Claim 4
Dependent Claim
39 words
A light-sensitive composition comprising a mixture of about 0.1 to about 10 parts by weight of an alkali-soluble hydroxyaryl-aldehyde resin, a styrene-maleic anhydride copolymer resin or mixture thereof per part by weight of a light-sensitive compound of the formula
Claim 5
Dependent Claim
15 words
A light-sensitive composition as defined in claim 5 wherein said alkali-soluble resin is phenolformaldehyde resin.
Claim 6
Dependent Claim
30 words
A light-sensitive composition as defined in claim 5 wherein the mixture contains about 0.5 to about five parts by weight of resin per part by weight of said light-sensitive compound.
Claim 7
Dependent Claim
15 words
A light-sensitive composition as defined in claim 5 wherein R is methoxy, ethoxy or butoxy.
Claim 8
Dependent Claim
32 words
A light-sensitive article adapted to be exposed to light and developed to form a lithographic printing plate which comprises a base sheet having a coating thereon of a compound of the formula
Claim 9
Dependent Claim
12 words
An article according to claim 9 wherein said base sheet is aluminum.
Claim 10
Dependent Claim
13 words
An article according to claim 9 wherein R is methoxy, ethoxy or butoxy.
Claim 11
Dependent Claim
36 words
An article according to claim 9 wherein said coating contains about 0.1 to about 10 parts by weight of an alkali-soluble hydroxyaryl-aldehyde resin, a styrene-maleic anhydride copolymer resin or mixture thereof per part of said compound.
Claim 12
Dependent Claim
13 words
An article according to claim 12 wherein said alkali-soluble resin is phenol-formaldehyde resin.
Claim 13
Dependent Claim
20 words
An article according to claim 12 wherein said coating contains about 0.5 to about five parts of said alkali-soluble resin.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |