US3568598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and composition for rendering hydrophilic an image area on a lithographic printing plate
Assignee: Eastman Kodak Co
•
Filing: 1966-10-24
•
Granted: 1971-03-09
•
Expires: 1986-10-24
Abstract
Abstract The image areas of a lithographic printing plate are rendered hydrophilic by being coated with a solution comprising a specified basic organic polymer, a cationic surfactant and an organic gelatin solvent.
Inventors
- 👤 Thomas I Abbott
- 👤 Donald A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:41
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03F7/063
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
49 words
A process of claim 1 in which the top layer comprises gelatin having a hardness equivalent to that of a gelatin layer containing from 2 grams to about 15 grams of dry Formaldehyde per pound of gelatin and contains in the gelatin layer an oleophilic tanned gelatin image area.
Claim 2
Dependent Claim
12 words
A process of claim 1 in which the basic polymer is polyethyleneimine.
Claim 3
Dependent Claim
33 words
A process of claim 1 in which the polymer is polyethyleneimine and the gelatin solvent is selected from the class consisting of formamide, dimethylformamide, urea, acetamide, hexamethylphosphoric triamide, dimethyl sulfoxide and tetrahydrothiophene-1, 1-dixoide.
Claim 4
Dependent Claim
17 words
A process of claim 1 in which the polymer is polyethyleneimine and the gelatin solvent is formamide.
Claim 5
Dependent Claim
17 words
A process of claim 1 in which the polymer is polyethyleneimine and the gelatin solvent is acetamide.
Claim 6
Dependent Claim
17 words
A process of claim 1 in which the polymer is polyethyleneimine and the gelatin solvent is dimethylformamide.
Claim 7
Dependent Claim
36 words
A product for rendering hydrophilic an oleophilic image area on a lithographic printing plate comprising 10-40 percent by weight of polyvinyl pyridine or at least one basic organic polymer comprising monomeric units having a structural formula:
Claim 8
Dependent Claim
25 words
A product of claim 8 in which the basic polymer is selected from the class consisting of polyethyleneimine, polydimethyl aminoethylmethacrylate, polyvinyl pyridine and polyvinyl amine.
Claim 9
Dependent Claim
33 words
A product of claim 8 in which the basic polymer is polyethyleneimine and the gelatin solvent is selected from the class consisting of formamide, dimethylformamide, urea, acetamide, hexamethylphosphoric triamide, dimethyl sulfoxide and tetrahydrothiophene-1,1-dioxide.
Claim 10
Dependent Claim
12 words
A product of claim 8 in which the basic polymer is polyethyleneimine.
Claim 11
Dependent Claim
13 words
A product of claim 8 in which the basic polymer is polydimethyl aminoethylmethacrylate.
Claim 12
Dependent Claim
13 words
A product of claim 8 in which the basic polymer is polyvinyl pyridine.
Claim 13
Dependent Claim
13 words
A product of claim 8 in which the basic polymer is polyvinyl amine.
Claim 14
Dependent Claim
14 words
A product of claim 8 in which the surfactant is cetyl trimethyl ammonium bromide.
Claim 15
Dependent Claim
16 words
A product of claim 8 in which the surfactant is lauryl amido ammonium sulfonic acid betaine.
Claim 16
Dependent Claim
18 words
A product of claim 8 in which the basic polymer is polyethyleneimine and the gelatin solvent is formamide.
Claim 17
Dependent Claim
18 words
A product of claim 8 in which the basic polymer is polyethyleneimine and the gelatin solvent is acetamide.
Claim 18
Dependent Claim
18 words
A product of claim 8 in which the basic polymer is polyethyleneimine and the gelatin solvent is dimethylformamide.
References Cited (Backward Citations)
US3161518A
Cited
US3455003A
Cited
US3399994A
Cited
US3338164A
Cited
US3276361A
Cited
US3394653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |