US4529654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for transfer images or slide-off images
Assignee: Hoffmann and Engelmann
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Filing: 1984-03-26
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Granted: 1985-07-16
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Expires: 2004-03-26
Abstract
Abstract A support is disclosed for transfer images or slide-off images, composed of absorbent paper with an applied barrier layer and a water-soluble separation layer for receiving an image layer, whereby the separation layer applied to said support comprises a homo- or co-polymer of acrylic acid and/or a copolymer of alkylvinyl ether and maleic acid anhydride.
Inventors
- 👤 Henner Drum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:11
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/175; B44C1/1754; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/2486; Y10T428/24934; Y10T428/27; Y10T428/273; Y10T428/277; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A support for transfer images or slide-off images, comprising: an absorbent paper base layer; a barrier layer applied to one side of the paper base layer; and a water-soluble separation layer applied to the barrier layer, wherein the separation layer comprises a mixture of a methylvinyl ether/maleic acid anhydride copolymer and dextrin.
Claim 2
Dependent Claim
52 words
A support for transfer images or slide-off images, comprising: an absorbent paper base layer; a barrier layer applied to one side of the paper base layer; and a water-soluble separation layer applied to the barrier layer, wherein the separation layer comprises a mixture of a methylvinyl ether/maleic acid anhydride copolymer and dextrin.
Claim 3
Dependent Claim
29 words
A paper support as claimed in claim 1, wherein the paper layer has an average weight per unit area of from about 100 to about 200 g/m 2 .
Claim 4
Dependent Claim
26 words
A paper support as claimed in claim 1, wherein the dry weight of the separation layer is from about 6 to about 15 g/m 2 .
Claim 5
Dependent Claim
26 words
A paper support as claimed in claim 1, wherein the dry weight of the separation layer is from about 8 to about 12 g/m 2 .
Claim 6
Dependent Claim
29 words
A paper support as claimed in claim 1, wherein the barrier layer comprises a coating selected from the group of starch, casein, glue, alkali metal silicate, and water glass.
Claim 7
Dependent Claim
21 words
A paper support as claimed in claim 1, wherein the separation layer comprises at least about 50% by weight of co-polymer.
Claim 8
Dependent Claim
50 words
A support for transfer images or slide-off images, comprising: an absorbent paper base layer; a barrier layer applied to one side of the paper base layer; and a water-soluble separation layer applied to the barrier layer, wherein the separation layer comprises a copolymer of alkylvinyl ether and maleic acid anhydride.
Claim 9
Dependent Claim
50 words
A support for transfer images or slide-off images, comprising: an absorbent paper base layer; a barrier layer applied to one side of the paper base layer; and a water-soluble separation layer applied to the barrier layer, wherein the separation layer comprises a copolymer of alkylvinyl ether and maleic acid anhydride.
Claim 10
Dependent Claim
25 words
A paper support as claimed in claim 7, wherein the separation layer comprises a mixture of a methylvinyl ether/maleic acid anhydride copolymer and a polysaccharide.
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) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |