US4544183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification card with a radiant energy reactive coating
Assignee: Computer Identification Systems Inc
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Filing: 1983-08-05
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Granted: 1985-10-01
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Expires: 2003-08-05
Abstract
Abstract A multi-layered engraved identification card includes a base layer having a first color and a color-changeable layer initially having a second color which is changeable to a third color contrasting with the first color upon exposure to radiant energy preferably having a wavelength of from 3,500 to 5,000 Angstroms, for a specified period of time. The color-changeable layer is initially prepared as a solution of a resin, a plasticizer, a radiant energy-sensitive coloring agent for causing the color change, and a solvent in which both the base and the resin of the solution are soluble. Alternatively, the solution may further include a cross-linkable plasticizer with a peroxide to cause the resin of the solution and the plastic of the base to be cross-linked and hence bonded permanently to the base. The engraving may be done after the color-changeable layer is formed on the base, or alternatively, the base may be first engraved and the color-changeable solution applied to the non-engraved surface regions or applied to fill the engraved depressions.
Inventors
- 👤 Dean B. Parkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:26
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/324; B42D25/40; B42D25/405; B42D25/415; B42D25/20; B42D25/23; B42D25/36; B42D25/378; B42D25/387; B42D25/43; B42D25/45; B42D2033/20; B42D2035/34; Y; Y10; Y10S; Y10S283/00; Y10S283/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A multilayered identification card comprising: a base layer having a first color, the base having a plurality of depressions of varying depths engraved therein to define an engraved image in the base; and a color-changeable layer disposed on and bonded to selected regions of the base layer, the color changeable layer initially having a second color, which color is permanently changeable, upon exposure to radiant energy for a specified period of time, to a third color which contrasts with the first color.
Claim 2
Dependent Claim
82 words
A multilayered identification card comprising: a base layer having a first color, the base having a plurality of depressions of varying depths engraved therein to define an engraved image in the base; and a color-changeable layer disposed on and bonded to selected regions of the base layer, the color changeable layer initially having a second color, which color is permanently changeable, upon exposure to radiant energy for a specified period of time, to a third color which contrasts with the first color.
Claim 3
Dependent Claim
21 words
The card of claim 2 wherein the second color is permanently changeable to the third color upon exposure to ultraviolet radiation.
Claim 4
Dependent Claim
15 words
The card of claim 2 wherein the color-changeable layer is diffusion-bonded to the base layer.
Claim 5
Dependent Claim
62 words
The card of claim 2 wherein the color-changeable layer is applied to the base as a liquid dispersion comprising: a polymeric binder; a dye precursor for causing the color-changeable layer to change from the second to the third color when exposed to permanently ultraviolet light; a free radical former; and a solvent in which both the base and the resin are soluble.
Claim 6
Dependent Claim
144 words
The card of claim 4 wherein the dye precursor is selected from the group consisting of ##STR6## wherein: R represents a monovalent radical selected from the group consisting of hydrogen, alkyl, aralkyl and aryl; R 1 represents a member selected from the group consisting of phenyl, α-naphthyl and β-naphthyl; R 2 represents a member selected from the group consisting of alkyl, aryl and aralkyl; and each R 3 represents a member selected from the group consisting of hydrogen, alkyl, aryl, aralkyl, alkoxy, halogen and dialkyl amino; and may be the same or different; and wherein the free radical former is selected from the group having the formula R--CX.sub.3 wherein R represents a member selected from the group consisting of hydrogen, halogen, alkyl, aralkyl, aryl and substituted aryl, and each X represents a halogen atom selected from the group consisting of chlorine, bromine and iodine.
Claim 7
Dependent Claim
26 words
The card of claim 4 wherein the dye precursor is diphenylamine, the free radical former is carbon tetrabromide and the third color is a triphenylmethane dye.
Claim 8
Dependent Claim
76 words
The card according to claim 5 wherein the color changeable layer is initially a liquid dispersion comprising: a vinyl copolymer; a cross-linkable plasticizer reactable with the base; a solvent in which the vinyl copolymer and the base are soluble; a peroxide for actuating the cross-linking; and the dye precursor, whereby the plasticizer and the peroxide are selected to act to react with the base to effect molecular cross-linking between the color changeable layer and the base.
Claim 9
Dependent Claim
76 words
The card of claim 6 wherein the color changeable layer is initially a liquid dispersion comprising: a vinyl copolymer; a cross linkable plasticizer reactable with the base; a solvent in which the vinyl copolymer and the base are soluble; a peroxide for actuating the cross-linking; and the dye precursor, whereby the plasticizer and the peroxide are selected to act to react with the base to effect molecular cross-linking between the color changeable layer and the base.
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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 |