US4115618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel protective plastomeric sheet for identification card
Assignee: Polaroid Corp
•
Filing: 1976-02-02
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Granted: 1978-09-19
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Expires: 1996-02-02
Abstract
Abstract A protective plastomeric sheet material for lamination to an image containing layer of a diffusion transfer photographic product.
Inventors
- 👤 William T. Macleish
- 👤 Joseph Shulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:27
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/40; B42D25/45; B42D25/465; B42D25/47; B42D25/20; B42D25/23; B42D25/30; B42D25/309; B42D25/405; B42D25/415; B42D25/42; B42D2033/14; B42D2033/30; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24893; Y10T428/24901; Y10T428/24909; Y10T428/28; Y10T428/2813; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
58 words
A protective plastic sheet material comprising a cellulose ester sheet having one surface thereof hydrolyzed and a layer, bonded to said hydrolyzed surface, consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a low molecular weight polyvinyl acetate, the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate being between about 1:3 to about 3:1.
Claim 2
Dependent Claim
58 words
A protective plastic sheet material comprising a cellulose ester sheet having one surface thereof hydrolyzed and a layer, bonded to said hydrolyzed surface, consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a low molecular weight polyvinyl acetate, the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate being between about 1:3 to about 3:1.
Claim 3
Dependent Claim
18 words
A sheet material of claim 1 where the hydrolyzed polyvinyl alcohol is composed of about 99% polyvinyl alcohol.
Claim 4
Dependent Claim
18 words
A sheet material of claim 1 where the molecular weight of the polyvinyl acetate is below about 200,000.
Claim 5
Dependent Claim
19 words
A sheet material of claim 1 where the ratio of hydrolyzed polyvinyl alcohol to polyvinyl acetate is about 1:1.
Claim 6
Dependent Claim
13 words
A sheet material of claim 1 where said cellulose ester is cellulose triacetate.
Claim 7
Dependent Claim
64 words
A protective plastomeric sheet material comprising a cellulose triacetate sheet having one surface thereof hydrolyzed and a layer, bonded to said hydrolyzed surface said layer consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a polyvinyl acetate having a molecular weight below about 200,000, the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate being between about 1:3 to about 3:1.
Claim 8
Dependent Claim
64 words
A protective plastomeric sheet material comprising a cellulose triacetate sheet having one surface thereof hydrolyzed and a layer, bonded to said hydrolyzed surface said layer consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a polyvinyl acetate having a molecular weight below about 200,000, the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate being between about 1:3 to about 3:1.
Claim 9
Dependent Claim
18 words
A sheet material of claim 6 where the hydrolyzed polyvinyl alcohol is composed of about 99% polyvinyl alcohol.
Claim 10
Dependent Claim
14 words
A protective plastomeric sheet material of claim 6 where the ratio is about 1:1.
Claim 11
Dependent Claim
101 words
A laminated article which comprises a plastomeric sheet material comprising a cellulose ester sheet having one surface thereof hydrolyzed and a layer, bonded to said hydrolyzed surface, said layer consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a low molecular weight polyvinyl acetate having a molecular weight below about 200,000 and where the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate is between about 1:3 to about 3:1 and a diffusion transfer color image bonded to said layer, said color image being carried in an image-receiving layer comprising a mixture of polyvinyl alcohol and poly-4-vinyl pyridine.
Claim 12
Dependent Claim
101 words
A laminated article which comprises a plastomeric sheet material comprising a cellulose ester sheet having one surface thereof hydrolyzed and a layer, bonded to said hydrolyzed surface, said layer consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a low molecular weight polyvinyl acetate having a molecular weight below about 200,000 and where the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate is between about 1:3 to about 3:1 and a diffusion transfer color image bonded to said layer, said color image being carried in an image-receiving layer comprising a mixture of polyvinyl alcohol and poly-4-vinyl pyridine.
Claim 13
Dependent Claim
17 words
An article of claim 9 where the hydrolyzed polyvinyl alcohol is composed of about 99% polyvinyl alcohol.
Claim 14
Dependent Claim
20 words
An article of claim 9 where the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate is about 1:1.
Claim 15
Dependent Claim
17 words
An article of claim 9 where said image-receiving is coated with a layer comprising a hydrophilic colloid.
Claim 16
Dependent Claim
12 words
An article of claim 12 where the hydrophilic colloid comprises gum arabic.
Claim 17
Dependent Claim
18 words
An article of claim 9 where the molecular weight of the polyvinyl acetate is less than about 200,000.
Claim 18
Dependent Claim
12 words
An article of claim 9 where said cellulose ester is cellulose triacetate.
Claim 19
Dependent Claim
98 words
A laminated article which comprises a protective plastomeric sheet material comprising a cellulose triacetate sheet having one surface thereof hydrolyzed and a layer bonded to said hydrolyzed surface, said layer consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a polyvinyl acetate having a molecular weight below about 200,000 with the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate being between about 1:3 to about 3:1 and a diffusion transfer color image bonded to said layer, said image being carried in an image-receiving layer comprising a mixture of polyvinyl alcohol and a poly-4-vinyl pyridine.
Claim 20
Dependent Claim
98 words
A laminated article which comprises a protective plastomeric sheet material comprising a cellulose triacetate sheet having one surface thereof hydrolyzed and a layer bonded to said hydrolyzed surface, said layer consisting essentially of a mixture of a hydrolyzed polyvinyl alcohol and a polyvinyl acetate having a molecular weight below about 200,000 with the ratio of the hydrolyzed polyvinyl alcohol to the polyvinyl acetate being between about 1:3 to about 3:1 and a diffusion transfer color image bonded to said layer, said image being carried in an image-receiving layer comprising a mixture of polyvinyl alcohol and a poly-4-vinyl pyridine.
Claim 21
Dependent Claim
12 words
An article of claim 1 where the hydrophilic colloid comprises gum arabic.
Claim 22
Dependent Claim
19 words
An article of claim 16 where the ratio of the hydrolyzed polyvinyl alcohol to polyvinyl acetate is about 1:1.
Claim 23
Dependent Claim
18 words
An article of claim 16 where said image-receiving layer is coated with a layer comprising a hydrophilic colloid.
Claim 24
Dependent Claim
17 words
An article of claim 16 where the hydrolyzed polyvinyl alcohol is composed of about 99% polyvinyl alcohol.
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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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |