Patent US3919447A successfully refreshed from Google Patents.
US3919447A
Expired / Lapsed
US
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Spectral differential coded card
Assignee: International Business Machines Corp
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Filing: 1974-03-20
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Granted: 1975-11-11
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Expires: 1994-03-20
Abstract
Abstract A card suitable for use in personal and item identification; the card comprises a first film such as polyvinyl chloride with a transmission bandpass in the infra red region, and either a selectively apertured second film laminated on the first film, or, discrete areas of the second film laminated on preselected areas of the first film. The second film is opaque at a single frequency within the first film bandpass. The films may be formed from the same material but for the trace amounts of a carbonyl group in the structure of the second film polymer, the laminate otherwise being transparent and reflectively uniform in the visible light region.
Inventors
- 👤 Jr Charlie C Kilmer
- 👤 George J Laurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:51
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/20; B42D25/21; G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/14; B42D25/40; B42D25/45; G07; G07F; G07F7/00; G07F7/08; G07F7/086; B42D2033/08; B42D2033/18; B42D2033/22; B42D2033/30; B42D2033/32; B42D25/30; B42D25/346; B42D25/36; B42D25/378; B42D25/382; Y; Y10; Y10S; Y10S283/00; Y10S283/904; Y10S428/00; Y10S428/916; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24942
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
105 words
A CARD OR THE LIKE SUITABLE FOR USE IN PERSONAL AND ITEM IDENTIFICATION COMPRISING: A FIRST FILM HAVING AN OPTICAL BANDPASS TRANSMISSION FREE FROM SHARP BAND ABSORPTION CHARACTERISTICS IN A PREDETERMINED NON-VISIBLE LIGHT WAVE REGION; AND A SELECTIVELY APERTURED SECOND FILM LAMINATED UPON THE FIRST FILM AND HAVING A SUBSTANTIALLY SIMILAR SPECTRAL RESPONSE AS THAT OF THE FIRST FILM WITHIN THE PREDETERMINED NON-VISIBLE LIGHT WAVE REGION OF THE FIRST FILM BANDPASS BUT FOR A SHARP BAND ABSORPTION CHARACTERISTIC AT A NEAR SINGLE FREQUENCY, THE LAMINATE INCLUDING THE APERTURED PORTIONS THEREOF FURTHER EXHIBITING A SUBSTANTIALLY UNIFORM TRANSMISSIVITY AND SURFACE REFLECTANCE IN THE VISIBLE LIGHT WAVE REGION.
Claim 2
Dependent Claim
105 words
A CARD OR THE LIKE SUITABLE FOR USE IN PERSONAL AND ITEM IDENTIFICATION COMPRISING: A FIRST FILM HAVING AN OPTICAL BANDPASS TRANSMISSION FREE FROM SHARP BAND ABSORPTION CHARACTERISTICS IN A PREDETERMINED NON-VISIBLE LIGHT WAVE REGION; AND A SELECTIVELY APERTURED SECOND FILM LAMINATED UPON THE FIRST FILM AND HAVING A SUBSTANTIALLY SIMILAR SPECTRAL RESPONSE AS THAT OF THE FIRST FILM WITHIN THE PREDETERMINED NON-VISIBLE LIGHT WAVE REGION OF THE FIRST FILM BANDPASS BUT FOR A SHARP BAND ABSORPTION CHARACTERISTIC AT A NEAR SINGLE FREQUENCY, THE LAMINATE INCLUDING THE APERTURED PORTIONS THEREOF FURTHER EXHIBITING A SUBSTANTIALLY UNIFORM TRANSMISSIVITY AND SURFACE REFLECTANCE IN THE VISIBLE LIGHT WAVE REGION.
Claim 3
Dependent Claim
118 words
A card or the like suitable for use in personal and item identification comprising: a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined non-visible light wave region; and a second film having discrete areas laminated upon preselected areas of the first film, said second film discrete areas having a substantially similar spectral response as that of the first film within the predetermined non-visible light wave region of the first film bandpass but for a sharp band absorption characteristic at a near single frequency, the first film including the portions discretely laminated with the second film further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 4
Dependent Claim
118 words
A card or the like suitable for use in personal and item identification comprising: a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined non-visible light wave region; and a second film having discrete areas laminated upon preselected areas of the first film, said second film discrete areas having a substantially similar spectral response as that of the first film within the predetermined non-visible light wave region of the first film bandpass but for a sharp band absorption characteristic at a near single frequency, the first film including the portions discretely laminated with the second film further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 5
Dependent Claim
129 words
A card or the like suitable for use in personal and item identification comprising: a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined portion of the infra-red region; and a selectively apertured second film laminated upon the first film and having a substantially similar spectral response as that of the first film within the predetermined portion of the infra-red region of the first film bandpass but for a sharp band absorption characteristic at a near single frequency, the second film being formed from polymeric material having a carbonyl group and an associated ester group present in the polymer structure, the laminate including the apertured portions thereof further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 6
Dependent Claim
129 words
A card or the like suitable for use in personal and item identification comprising: a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined portion of the infra-red region; and a selectively apertured second film laminated upon the first film and having a substantially similar spectral response as that of the first film within the predetermined portion of the infra-red region of the first film bandpass but for a sharp band absorption characteristic at a near single frequency, the second film being formed from polymeric material having a carbonyl group and an associated ester group present in the polymer structure, the laminate including the apertured portions thereof further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 7
Dependent Claim
132 words
A card or the like suitable for use in personal and item identification comprising: a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined non-visible light wave region; and a selectively apertured second film laminated upon the first film and formed from the same material but for the presence of trace amounts of a chemical group in the structure of the second film, the second film exhibiting the same spectral response as the first film within the predetermined non-visible light wave region of the first film bandpass with the exception that the chemical group is sharply spectrally absorptive at a near single frequency, the laminate including the apertured pOrtions thereof further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 8
Dependent Claim
132 words
A card or the like suitable for use in personal and item identification comprising: a first film having an optical bandpass transmission free from sharp band absorption characteristics in a predetermined non-visible light wave region; and a selectively apertured second film laminated upon the first film and formed from the same material but for the presence of trace amounts of a chemical group in the structure of the second film, the second film exhibiting the same spectral response as the first film within the predetermined non-visible light wave region of the first film bandpass with the exception that the chemical group is sharply spectrally absorptive at a near single frequency, the laminate including the apertured pOrtions thereof further exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 9
Dependent Claim
18 words
A card according to claim 4, wherein the chemical group includes a carbonyl group and an associated ester.
Claim 10
Dependent Claim
23 words
A card according to claim 4, wherein: the first film comprises polyvinyl chloride, and the second film comprises polyvinyl chloride vinyl acetate copolymer.
Claim 11
Dependent Claim
88 words
A card or the like suitable for use in personal and item identification comprising: a first polyvinyl chloride film; and a selectively apertured second polyvinyl chloride film laminated on the first film and having carbonyl groups attached to the second film polymeric structures in a concentration of sufficient magnitude such that its infra-red spectrum shows a distinctive single frequency absorption characteristic lying within the infrared transmission band of the first film, said laminated structure exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
Claim 12
Dependent Claim
88 words
A card or the like suitable for use in personal and item identification comprising: a first polyvinyl chloride film; and a selectively apertured second polyvinyl chloride film laminated on the first film and having carbonyl groups attached to the second film polymeric structures in a concentration of sufficient magnitude such that its infra-red spectrum shows a distinctive single frequency absorption characteristic lying within the infrared transmission band of the first film, said laminated structure exhibiting a substantially uniform transmissivity and surface reflectance in the visible light wave region.
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |