Patent US4304809A successfully refreshed from Google Patents.
US4304809A
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US
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Identity card with grid images
Assignee: Hoechst AG
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Filing: 1979-10-07
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Granted: 1981-12-08
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Expires: 1999-10-07
Abstract
Abstract Disclosed is an identity card having grid images thereon comprised of a linear grid structure. In various embodiments, the grid depths of the individual grid images differ and can produce several different image colors. The card in a further embodiment can comprise a number of layers which are laminated together around a card core which has a window located therein. A number of variations of grid images can be included and/or superposed in the window in order to provide a security identification system which is extremely difficult to forge. Also disclosed are numerous combinations of grid structures some of which include grid images which may be absorption images and/or phase images.
Inventors
- 👤 Roland Moraw
- 👤 Gotz von dem Bussche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:06
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/351; G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/16; B42D25/20; B42D25/23; B42D25/324; B42D25/40; B42D25/405; B42D25/41; B42D25/45; B42D2033/04; B42D2033/14; B42D2033/24; B42D2035/02; B42D2035/06; B42D2035/08; B42D2035/16; B42D2035/20; B42D2035/44; B42D2035/50; B42D25/309; B42D25/318; B42D25/328; Y; Y10; Y10S; Y10S283/00; Y10S283/904; Y10S428/00; Y10S428/916; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24942; Y10T428/2495
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
86 words
An identity card comprising: at least one layer, said layer including a window therein: a grid carrier located in said window, said grid image carrier comprising means for defining at least one grid image, said grid image having a linear grid structure of different depths, said grid image comprising means for producing during readout by light transmission during reconstruction at least one colored information; and means for carrying information identifying a cardholder, said grid images comprising at least one linear grid structure as protection against forgery.
Claim 2
Dependent Claim
86 words
An identity card comprising: at least one layer, said layer including a window therein: a grid carrier located in said window, said grid image carrier comprising means for defining at least one grid image, said grid image having a linear grid structure of different depths, said grid image comprising means for producing during readout by light transmission during reconstruction at least one colored information; and means for carrying information identifying a cardholder, said grid images comprising at least one linear grid structure as protection against forgery.
Claim 3
Dependent Claim
14 words
An identity card according to claim 1, wherein said grid images are absorption images.
Claim 4
Dependent Claim
14 words
An identity card according to claim 1, wherein said grid images are phase images.
Claim 5
Dependent Claim
18 words
An identity card according to claim 1, wherein said grid images are both absorption images and phase images.
Claim 6
Dependent Claim
23 words
An identity card according to claim 1, wherein said grid images include grid structures having a period length of less than 1/400 mm.
Claim 7
Dependent Claim
21 words
An identity card according to claim 1, wherein the grid images are comprised of phase images having a relief grid structure.
Claim 8
Dependent Claim
15 words
An identity card according to claim 1, wherein said card comprises a plurality of layers.
Claim 9
Dependent Claim
18 words
An identity card according to claim 7, wherein said grid image comprises a plurality of superposed part images.
Claim 10
Dependent Claim
30 words
An identity card according to claim 8, wherein each of said part images have grid structures which differ from one another in at least one of their dimensions and orientations.
Claim 11
Dependent Claim
24 words
An identity card according to claim 7, wherein one of said layers comprises a card core, said card core including means defining a window.
Claim 12
Dependent Claim
18 words
An identity card according to claim 10, wherein said grid image carrier has said grid images applied thereto.
Claim 13
Dependent Claim
16 words
An identity card according to claim 10, wherein the grid image carrier extends beyond said window.
Claim 14
Dependent Claim
52 words
An identity card according to one of claims 10 to 12, wherein said plurality of layers includes at least two transparent films laminated on each side of said card core, said card further includes means for reinforcing said window, said reinforcing means comprising at least one transparent film insert capable of lamination.
Claim 15
Dependent Claim
53 words
An identity card according to one of claims 10 to 12, wherein said plurality of layers includes at least two transparent films laminated on each side of said card core, said card further includes means for reinforcing said window, said reinforcing means comprising at least one transparent film insert not capable of lamination.
Claim 16
Dependent Claim
38 words
An identity card according to one of claims 10 to 12, wherein said window has a diameter and said grid images include grid structures having a period length which is not less than the diameter of said window.
Claim 17
Dependent Claim
35 words
An identity card according to one of claims 10 to 12, wherein said window has a diameter and said grid images include grid structures having a period length smaller than the diameter of said window.
References Cited (Backward Citations)
US2932913A
Cited
US3391479A
Cited
US3457661A
Cited
DE2308876A1
Cited
US4092234A
Cited
DE2639464C3
Cited
DE2657246B1
Cited
DE2734581B1
Cited
US4269915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |