US4822723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer compositions for heavy-duty lithographic printing plates
Assignee: Hoechst Celanese Chemical Co
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Filing: 1987-11-30
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Granted: 1989-04-18
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Expires: 2007-11-30
Abstract
Abstract A developer composition for heavy duty printing plates which comprises in admixture: (a) propylene glycol monomethyl ether or dipropylene glycol monomethyl ether; and (b) benzyl alcohol and/or phenoxyethanol; and (c) ethylene carbonate and/or propylene carbonate; and (d) ethylene glycol diacetate; and (e) sodium benzoate and/or lithium benzoate; and (f) benzoic acid and/or citric acid; and (g) ethylene glycol, propylene glycol and/or glycerin; and (h) sufficient water to formulate an effective developer; wherein the percentages are based on the weight of the developer composition.
Inventors
- 👤 Major S. Dhillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:05
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/26; G03F7/30; G03F7/32
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
187 words
A developer composition which comprises in admixture: (a) from about 25.0% to about 75.0% of one or more components selected from the group consisting of propylene glycol monomethyl ether and dipropylene glycol monomethyl ether; and (b) from about 0.5% to about 10.0% of one or more components selected from the group consisting of benzyl alcohol, phenoxypropenol and phenoxyethanol; and (c) from about 0.05% to about 5.0% of one or more components selected from the group consisting of ethylene carbonate and propylene carbonate; and (d) from about 1.0% to about 30.0% ethylene glycol diacetate; and (e) from about 0.1% to about 10.0% of one or more components selected from the group consisting of sodium benzoate and lithium benzoate, and (f) from about 0.05% to about 5.0% of one or more components selected from the group consisting of benzoic acid and citric acid; and (g) from about 1% to about 35% of one or more components selected from the group consisting of ethylene glycol, propylene glycol and glycerin, and (h) sufficient water to formulate an effective developer; wherein said percentages are based on the weight of the developer composition.
Claim 2
Dependent Claim
187 words
A developer composition which comprises in admixture: (a) from about 25.0% to about 75.0% of one or more components selected from the group consisting of propylene glycol monomethyl ether and dipropylene glycol monomethyl ether; and (b) from about 0.5% to about 10.0% of one or more components selected from the group consisting of benzyl alcohol, phenoxypropenol and phenoxyethanol; and (c) from about 0.05% to about 5.0% of one or more components selected from the group consisting of ethylene carbonate and propylene carbonate; and (d) from about 1.0% to about 30.0% ethylene glycol diacetate; and (e) from about 0.1% to about 10.0% of one or more components selected from the group consisting of sodium benzoate and lithium benzoate, and (f) from about 0.05% to about 5.0% of one or more components selected from the group consisting of benzoic acid and citric acid; and (g) from about 1% to about 35% of one or more components selected from the group consisting of ethylene glycol, propylene glycol and glycerin, and (h) sufficient water to formulate an effective developer; wherein said percentages are based on the weight of the developer composition.
Claim 3
Dependent Claim
13 words
The developer of claim 1 wherein component (a) comprises propylene glycol monomethyl ether.
Claim 4
Dependent Claim
11 words
The developer of claim 1 wherein component (b) comprises benzyl alcohol.
Claim 5
Dependent Claim
11 words
The developer of claim 1 wherein component (c) comprises ethylene carbonate.
Claim 6
Dependent Claim
12 words
The developer of claim 1 wherein component (e) comprises sodium benzoate acid.
Claim 7
Dependent Claim
12 words
The developer of claim 1 wherein said component (f) comprises benzoic acid.
Claim 8
Dependent Claim
17 words
The developer of claim 2 wherein said component (g) comprises an admixture of glycerin and ethylene glycol.
Claim 9
Dependent Claim
28 words
The developer of claim 1 wherein component (a) is present in an amount of from about 45.0% to about 55.0% based on the weight of the developer composition.
Claim 10
Dependent Claim
28 words
The developer of claim 1 wherein component (b) is present in an amount of from about 2.0% to about 4.0% based on the weight of the developer composition.
Claim 11
Dependent Claim
28 words
The developer of claim 1 wherein component (c) is present in an amount of from about 0.3% to about 0.7% based on the weight of the developer composition.
Claim 12
Dependent Claim
29 words
The developer of claim 1 wherein said component (d) is present in an amount of from about 10.0% to about 15.0% based on the weight of the developer composition.
Claim 13
Dependent Claim
28 words
The developer of claim 1 wherein component (e) is present in an amount of from about 0.7% to about 1.3% based on the weight of the developer composition.
Claim 14
Dependent Claim
28 words
The developer of claim 1 wherein component (f) is present in an amount of from about 0.4% to about 0.6% based on the weight of the developer composition.
Claim 15
Dependent Claim
20 words
The developer of claim 1 wherein component (g) is present in an amount of from about 10.0% and about 13.0%.
Claim 16
Dependent Claim
152 words
The developer of claim 1 wherein said component (a) comprises propylene glycol monomethyl ether and is present in an amount of from 45.0% to about 55.0% component (b) comprises benzyl alcohol and is present in an amount of from about 2.0% to about 4.0%, component (c) comprises ethylene carbonate and is present in an amount of from about 0.3% to about 0.7%, component (d) is present in an amount of from about 10.0% to about 15.0%, component (e) comprises sodium benzoate and is present in an amount of from about 0.7% to about 1.3% and said component (f) is benzoic acid and is present in an amount of from about 0.4% to about 0.6%; and said component (g) is an admixture of glycerin and ethylene glycol present in an amount of from about 10.0% to about 13.0% and the ratio of glycerin to ethylene glycol ranges from about 1:15 to about 200:1.
Claim 17
Independent Claim
224 words
A method of treating a photographic element which comprises imagewise exposing a positive working or negative working photographic element to sufficient actinic radiation to form a latent image thereon, and then removing the non-image portions thereof with: a developer composition which comprises in admixture: (a) from about 25.0% to about 75.0% of one or more components selected from the group consisting of propylene glycol monomethyl ether and dipropylene glycol monomethyl ether; and (b) from about 0.5% to about 10.0% of one or more components selected from the group consisting of benzyl alcohol, phenoxypropanol and phenoxyethanol; and (c) from about 0.05% to about 5.0% of one or more components selected from the group consisting of ethylene carbonate and propylene carbonate., and (d) from about 1.0% to about 30.0% ethylene glycol diacetate; and (e) from about 0.1% to about 10.0% of one or more components selected from the group consisting of sodium benzoate and lithium benzoate; and (f) from about 0.05% to about 5.0% of one or more components selected from the group consisting of benzoic acid and citric acid; and (g) from about 1% to about 35% of one or more components selected from the group consisting of ethylene glycol, propylene glycol and glycerin; and (h) sufficient water to formulate an effective developer; wherein said percentages are based on the weight of the developer composition.
Claim 18
Independent Claim
224 words
A method of treating a photographic element which comprises imagewise exposing a positive working or negative working photographic element to sufficient actinic radiation to form a latent image thereon, and then removing the non-image portions thereof with: a developer composition which comprises in admixture: (a) from about 25.0% to about 75.0% of one or more components selected from the group consisting of propylene glycol monomethyl ether and dipropylene glycol monomethyl ether; and (b) from about 0.5% to about 10.0% of one or more components selected from the group consisting of benzyl alcohol, phenoxypropanol and phenoxyethanol; and (c) from about 0.05% to about 5.0% of one or more components selected from the group consisting of ethylene carbonate and propylene carbonate., and (d) from about 1.0% to about 30.0% ethylene glycol diacetate; and (e) from about 0.1% to about 10.0% of one or more components selected from the group consisting of sodium benzoate and lithium benzoate; and (f) from about 0.05% to about 5.0% of one or more components selected from the group consisting of benzoic acid and citric acid; and (g) from about 1% to about 35% of one or more components selected from the group consisting of ethylene glycol, propylene glycol and glycerin; and (h) sufficient water to formulate an effective developer; wherein said percentages are based on the weight of the developer composition.
Claim 19
Dependent Claim
13 words
The method of claim 16 wherein component (a) comprises propylene glycol monomethyl ether.
Claim 20
Dependent Claim
11 words
The method of claim 16 wherein component (b) comprises benzyl alcohol.
Claim 21
Dependent Claim
11 words
The method of claim 16 wherein component (c) comprises ethylene carbonate.
Claim 22
Dependent Claim
11 words
The method of claim 16 wherein component (e) comprises sodium benzoate.
Claim 23
Dependent Claim
12 words
The method of claim 16 wherein said component (f) comprises benzoic acid.
Claim 24
Dependent Claim
32 words
The method of claim 16 wherein said component (g) comprises an admixture of glycerin and ethylene glycol, and the ratio of glycerin to ethylene glycol ranges from about 1:15 to about 200:1.
Claim 25
Dependent Claim
154 words
The method of claim 16 wherein said component (a) comprises propylene glycol monomethyl ether and is present in an amount of from 45.0% to about 55.0%, component (b) comprises benzyl alcohol and is present in an amount of from about 2.0% to about 4.0%, component (c) comprises ethylene carbonate and is present in an amount of from about 0.3% to about 0.7% component (d) is present in an amount of from about 10.0% to about 15.0%, component (e) comprises sodium benzoate and is present in an amount of from about 0.7% to about 1.3% and said component (f) is benzoic acid and is present in an amount of from about 0.4% to about 0.6%; and said component (g) is an admixture of glycerin and ethylene glycol and is present in an amount of from about 10.0% to about 13.0% and the ratio of glycerin to ethylene glycol ranges from about 1:15 to about 200:1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |