US4267260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer for lithographic printing plate
Assignee: Mitsubishi Chemical Corp
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Filing: 1976-07-19
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Granted: 1981-05-12
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Expires: 1996-07-19
Abstract
Abstract A developer for use with a lithographic photo-sensitive medium of a polyether resin, comprising a compound of the formula: RO-CH2-CH2-O-kR1 or ROCH2CH2OR2 (wherein R represents an alkyl group with carbon number of 1 to 4, R1 represents hydrogen or an acyl group, R2 represents an acyl group with a carbon number of 2 to 5, and k represents an integer of 2 to 3).
Inventors
- 👤 Konoe Miura
- 👤 Chihiro Eguchi
- 👤 Yoshihiro Takahashi
- 👤 Akinobu Oshima
- 👤 Kazuo Torige
- 👤 Shinichi Bunya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:53
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/038; G03F7/0388; G03F7/26; G03F7/30; G03F7/32; G03F7/325
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A method for developing the exposed image of a lithographic photosensitive polymer containing repeating units of the formula: ##STR6## or the formula: ##STR7## wherein X and Y represent hydrogen, halogen, cyano or nitro; Ar represents an aryl group which can be substituted and m and n each represent an integer of 1 to 2, which comprises: treating said exposed lithographic photosensitive medium with a developer consisting essentially of an image developable amount of a compound of the formula: RO--CH.sub.2 --CH.sub.2 --O--.sub.k R.sup.1 ( 2) or ROCH.sub.2 CH.sub.2 OR.sup.2 ( 3) wherein R represents an alkyl groups with a carbon number of 1 to 4, R 1 represents hydrogen or an acyl group, R 2 represents an acyl group with a carbon number of 2 to 5, and k represents an integer of 2 to 3, for a time sufficient to dissolve and remove only the unexposed portions of said photosensitive medium.
Claim 2
Independent Claim
151 words
A method for developing the exposed image of a lithographic photosensitive polymer containing repeating units of the formula: ##STR6## or the formula: ##STR7## wherein X and Y represent hydrogen, halogen, cyano or nitro; Ar represents an aryl group which can be substituted and m and n each represent an integer of 1 to 2, which comprises: treating said exposed lithographic photosensitive medium with a developer consisting essentially of an image developable amount of a compound of the formula: RO--CH.sub.2 --CH.sub.2 --O--.sub.k R.sup.1 ( 2) or ROCH.sub.2 CH.sub.2 OR.sup.2 ( 3) wherein R represents an alkyl groups with a carbon number of 1 to 4, R 1 represents hydrogen or an acyl group, R 2 represents an acyl group with a carbon number of 2 to 5, and k represents an integer of 2 to 3, for a time sufficient to dissolve and remove only the unexposed portions of said photosensitive medium.
Claim 3
Dependent Claim
22 words
The method of claim 1, wherein said compound is a diethyleneglycol monoalkylether, a triethyleneglycolmonoalkylether, a diethyleneglycol monoalkylether acetate, or a triethyleneglycolmonoalkylether acetate.
Claim 4
Dependent Claim
13 words
The method of claim 1, wherein said compound is diethyleneglycolmonoethylether or ethyleneglycolmonomethylether acetate.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein said developer further consists of an image developable amount of an inorganic acid, and organic acid or a substituted halogenacetic acid.
Claim 6
Dependent Claim
37 words
The method of claim 4, wherein said inorganic acid is hydrochloric acid or sulfuric acid; said organic acid is acetic acid and said halogenacetic acid is monochloroacetic acid, dichloroacetic acid, trichloroacetic acid, monobromoacetic acid or difluoroacetic acid.
Claim 7
Dependent Claim
18 words
The method of claim 1, wherein said developer further consists of water, glycerine, hydroxylamine hydrochloride or triethanolamine hydrochloride.
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) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |