Patent US4544181A successfully refreshed from Google Patents.
US4544181A
Expired / Lapsed
US
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Identification card
Assignee: GAO Gesellschaft fuer Automation und Organisation mbH
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Filing: 1980-02-20
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Granted: 1985-10-01
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Expires: 2000-02-20
Abstract
Abstract The invention relates to a multi-layered identification card comprising a card core laminated between cover sheets with user information appearing on the card inlet. At least one of the cover sheets is transparent. The information is provided on the inlet by means of a laser beam being controlled accordingly so as to protect against forgery. When producing the card the information is provided onto the inlet through the transparent cover sheet.
Inventors
- 👤 Thomas Maurer
- 👤 Wolfgang Gauch
- 👤 Ludwig Devrient
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:39
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/40; B42D25/405; B42D25/43; B42D25/435; B42D25/30; B42D25/351; B42D25/20; B42D25/23; B42D25/318; B42D25/324; B42D25/36; B42D25/369; B42D25/41; B42D25/45; G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G07; G07C; G07C9/00; G07C9/20; G07C9/22; G07C9/25; G07C9/257; G07F; G07F7/00; G07F7/08; G07F7/086; B42D2033/04; B42D2033/08; B42D2033/16; B42D2033/20; B42D2033/28; B42D2033/32; B42D2035/02; B42D2035/06; B42D2035/08; B42D2035/14; B42D2035/26; B42D2035/34; B42D2035/50; B42D25/455; B42D25/46; B42D25/48; B42D25/485; Y; Y10; Y10S; Y10S283/00; Y10S283/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
In a multilayer identification card, comprising two cover sheets at least one of which is transparent and an opaque card core laminated between the cover sheets and provided with visually perceptible information defined by patterns, letters, numbers and/or pictures, the improvement comprising the presence of said information in the card core in the form of localized, visible, thermally and irreversibly degraded core portions formed in said core by means of a laser beam traversing the transparent cover sheet subsequent to core lamination to said cover sheet, whereby the information is also formed in said cover sheet in register with and simultaneously with the information in the card core.
Claim 2
Dependent Claim
108 words
In a multilayer identification card, comprising two cover sheets at least one of which is transparent and an opaque card core laminated between the cover sheets and provided with visually perceptible information defined by patterns, letters, numbers and/or pictures, the improvement comprising the presence of said information in the card core in the form of localized, visible, thermally and irreversibly degraded core portions formed in said core by means of a laser beam traversing the transparent cover sheet subsequent to core lamination to said cover sheet, whereby the information is also formed in said cover sheet in register with and simultaneously with the information in the card core.
Claim 3
Dependent Claim
40 words
A multilayer identification card according to claim 1 whereby the opaque card core is made of paper and the information is present in form of dark markings caused by a partial burning of the paper material of the card core.
Claim 4
Dependent Claim
26 words
A multilayer identification card according to claim 1 in which the information on said transparent cover sheet is in relief and can be sensed by touch.
Claim 5
Dependent Claim
45 words
A multilayer identification card according to claim 1 in which the information comprises pictures formed by printing a grid of laser-sensitive material on said card core whereafter said grid is exposed to a laser beam resulting in a picture formed of dots comprising said grid.
Claim 6
Dependent Claim
29 words
A multilayer identification card according to claim 1 in which the information is superimposed on a background pattern printed on the card core by means of conventional printing techniques.
Claim 7
Dependent Claim
38 words
A multilayer identification card according to claim 5 in which the background pattern is printed with thermosensitive material so that the places in which the background pattern overlaps with the pattern of information show a recognizable color change.
Claim 8
Dependent Claim
31 words
A multilayer identification card according to claim 1 in which the information comprises pictures defined by shades of gray resulting from controlled burning by a laser beam of the card core.
Claim 9
Dependent Claim
24 words
A multilayer identification card according to claim 1 or 3 in which the information overlaps with a signature strip laminated onto the identification card.
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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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |