Patent FR2216643A1 successfully refreshed from Google Patents.
US5624784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kit of parts for making an alkaline processing liquid for processing a lithographic printing plate
Assignee: Agfa Gevaert NV
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Filing: 1996-03-18
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Granted: 1997-04-29
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Expires: 2016-03-18
Abstract
Abstract A kit of parts for preparing an alkaline processing liquid for use in preparing a lithographic printing plate according to the silver salt diffusion transfer process, and comprising all necessary active compounds for preparing said alkaline processing liquid, said active compounds being contained in parts physically separated from each other, at least one of said parts comprising an inorganic alkali in solid form and at least one of said other parts comprising a hydrophobizing agent and being substantially free from inorganic alkali.
Inventors
- 👤 Jos Vaes
- 👤 Renaat Ceulemans
- 👤 Lode Deprez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:09
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/36; G03C8/365; G03C5/00; G03C5/26; G03C5/264; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A kit of parts for preparing an alkaline processing liquid for use in preparing a lithographic printing plate according to the silver salt diffusion transfer process, and comprising all necessary active compounds for preparing said alkaline processing liquid, said active compounds being contained in parts physically separated from each other, at least one of said parts comprising an inorganic alkali in solid form and at least one of said other parts comprising a hydrophobizing agent and being substantially free from inorganic alkali.
Claim 2
Dependent Claim
82 words
A kit of parts for preparing an alkaline processing liquid for use in preparing a lithographic printing plate according to the silver salt diffusion transfer process, and comprising all necessary active compounds for preparing said alkaline processing liquid, said active compounds being contained in parts physically separated from each other, at least one of said parts comprising an inorganic alkali in solid form and at least one of said other parts comprising a hydrophobizing agent and being substantially free from inorganic alkali.
Claim 3
Dependent Claim
19 words
A kit according to claim 1 wherein said active compounds include a silver halide solvent and an inorganic sulphite.
Claim 4
Dependent Claim
15 words
A kit according to claim 2 wherein said active compounds further include a developing agent.
Claim 5
Dependent Claim
18 words
A kit according to claim 1 wherein said part comprising said hydrophobizing agent is present in solid form.
Claim 6
Dependent Claim
21 words
A kit according to claim 4 wherein said solid form consists of solid particles carrying at their surface said hydrophobizing agent.
Claim 7
Dependent Claim
14 words
A kit according to claim 5 wherein said solid particles comprise an inorganic sulphite.
Claim 8
Dependent Claim
28 words
A kit according to claim 5 wherein said particles further comprise at their surface a compound selected from the group consisting of a poly alkyleneoxide and a polyol.
Claim 9
Dependent Claim
17 words
A kit according to claim 1 wherein said part comprising said hydrophobizing agent is in liquid form.
Claim 10
Dependent Claim
24 words
A kit according to claim 8 wherein said liquid form is obtained with the aid of a liquid polyol and/or a liquid alkanol amine.
Claim 11
Dependent Claim
34 words
A kit according to claim 1 wherein said kit consists of two parts being physically separated, a first part comprising said inorganic alkali in solid form and said second part comprising said hydrophobizing agent.
Claim 12
Dependent Claim
32 words
A method of using a kit of parts as defined in claim 1 for preparing an alkaline processing liquid for making a printing plate according to the silver salt diffusion transfer process.
Claim 13
Dependent Claim
34 words
A method of use according to claim 11 wherein said part(s) comprising said inorganic alkali is (are) dissolved in water and subsequently said other part(s) is (are) dissolved in a thus obtained alkaline solution.
References Cited (Backward Citations)
US4649096A
Cited
US5204230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-28 | 2000-10-28 | 2001-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-28 | 2004-10-28 | 2005-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-28 | 2008-10-28 | 2009-04-29 | $7700.00 | Window Closed / Lapsed |