Patent US4511908A successfully refreshed from Google Patents.
US4511908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic identification card having forgery protection with respect to embossed information
Assignee: SECURITY CARD SYSTEMS Inc
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Filing: 1984-02-10
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Granted: 1985-04-16
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Expires: 2004-02-10
Abstract
Abstract This invention relates to a plastic identification card with forgery protection with respect to embossed information. There is a problem with existing credit cards in that the forgers can change the embossed information. This problem is overcome by providing in registration with the embossed information a layer of chemicals reactive under the pressure of a change in the embossed information to release a colored dye.
Inventors
- 👤 Edward A. Small
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:54
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/324; B42D25/20; B42D25/23; B42D25/318; B42D25/40; B42D25/405; B42D25/425; B42D25/45; B42D25/465; B42D25/47; G; G07; G07F; G07F7/00; G07F7/08; G07F7/086; B42D2033/04; B42D2033/12; B42D2033/30; B42D2035/08; Y; Y10; Y10S; Y10S283/00; Y10S283/904; Y10S428/00; Y10S428/916; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24802; Y10T428/24835
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
49 words
An identification card comprising a core stock, having embossed information and at least one layer of chemicals reactive under pressure in registration with the embossments to form a coloured dye conforming with the original embossed information and a further formation of such dye when the embossed information is altered.
Claim 2
Dependent Claim
49 words
An identification card comprising a core stock, having embossed information and at least one layer of chemicals reactive under pressure in registration with the embossments to form a coloured dye conforming with the original embossed information and a further formation of such dye when the embossed information is altered.
Claim 3
Dependent Claim
18 words
An identification card as in claim 1 in which a transparent plastic layer covers said layer of chemicals.
Claim 4
Dependent Claim
21 words
An identification card as in claim 2, having in addition a conventional signature panel on the surface of the transparent plastic.
Claim 5
Dependent Claim
18 words
An identification card as in claim 1 in which said layer of chemicals reactive under pressure comprise microcapsules.
Claim 6
Dependent Claim
29 words
An identification card as in claim 1, in which the layer of chemicals comprise chemicals reactive to form a dye in a single layer so as to be self-imaging.
Claim 7
Dependent Claim
49 words
An identification card as in claim 1, in which the layer of chemicals comprise a microcapsule coat and a receptive coat in registration with the microcapsule coat, a chemical in said microcapsule coat being reactive with a chemical in the receptive coat under pressure to form a coloured dye.
Claim 8
Dependent Claim
26 words
An identification card as in claim 1, in which said layer of chemicals is an extension of a signature panel including a layer of said chemicals.
Claim 9
Dependent Claim
12 words
An identification card as in claim 1, which is a credit card.
Claim 10
Dependent Claim
23 words
An identification card as in claim 1, in which an adhesive layer is interposed between the layer of chemicals and the core stock.
Claim 11
Dependent Claim
28 words
An identification card as in claim 1, in which a layer of blocking compound is interposed between the layer of chemicals and the transparent plastic layer covering it.
Claim 12
Dependent Claim
45 words
An identification card as in claim 1, in which an adhesive layer is interposed between the layer of chemicals and the core stock and in which a layer of blocking compound is interposed between the layer of chemicals and the transparent plastic layer covering it.
Claim 13
Dependent Claim
24 words
An identification card as in claim 1, in which the layer of chemicals is in registration with at least embossed distinctive alpha numeric information.
References Cited (Backward Citations)
US4462039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |