US4705299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic identity card capable of providing an inkless fingerprint and method of developing inkless prints on plastic card
Assignee: Identicator Corp
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Filing: 1986-05-27
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Granted: 1987-11-10
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Expires: 2006-05-27
Abstract
Abstract A plastic identity card is provided with an ink absorbent coating over a preassigned space thereon. The ink absorbent coating includes a chemical reagent capable of chemically reacting with a substantially colorless developer solution applied by a finger thereto to provide a perceivable colorant product representative of the fingerprint ridge pattern.
Inventors
- 👤 Virgil Hedgcoth
- 👤 Douglas C. Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:57
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/36; B42D25/378; B42D25/40; B42D25/405; B42D25/415; B42D25/20; B42D25/23; B42D2033/10; B42D2033/18; B42D2033/20; B42D2033/30; B42D2033/32; B42D2035/08; B42D25/313; B42D25/318; B42D25/373; B42D25/43; B42D25/445; B42D25/45; Y; Y10; Y10S; Y10S283/00; Y10S283/904
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
119 words
In a method of developing inkless fingerprints on a nonporous plastic identity card the steps of: mixing a liquid reagent with a chemical compound capable of providing an adherent ink absorbent coating on the plastic card; applying the mixture of reagent and chemical compound over or section of the card of sufficient size to receive a fingerprint to provide a porous ink receptive coating over said section; applying a substantially colorless liquid developer solution to a finger of a person whose print is desired on the card; and pressing the finger with developer solution thereon over the porous coating, the liquid reagent and developer solution chemically interacting to provide a perceivable colorant product representative of the fingerprint ridge pattern.
Claim 2
Dependent Claim
119 words
In a method of developing inkless fingerprints on a nonporous plastic identity card the steps of: mixing a liquid reagent with a chemical compound capable of providing an adherent ink absorbent coating on the plastic card; applying the mixture of reagent and chemical compound over or section of the card of sufficient size to receive a fingerprint to provide a porous ink receptive coating over said section; applying a substantially colorless liquid developer solution to a finger of a person whose print is desired on the card; and pressing the finger with developer solution thereon over the porous coating, the liquid reagent and developer solution chemically interacting to provide a perceivable colorant product representative of the fingerprint ridge pattern.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the chemical compound comprises vinyl resins and a flatting agent.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the flatting agent is silica.
Claim 5
Dependent Claim
16 words
The method of claim 3 wherein the mixture is applied to the card by silk screening.
Claim 6
Dependent Claim
47 words
The method of claim 1 wherein the chemical composition is a polyester material and, wherein the mixture is first secured to a mylar backing and the mylar backed mixture is then applied to the card by heat and pressure to permanently bind the mixture to the card.
Claim 7
Dependent Claim
45 words
The method of claim 4 wherein the chemical compound comprises vinyl resins, and a vinyl resin thinner and the liquid reagent includes one of the salts of 8-quinolinol, dimethyldithiocarbamic acid sodium salt dihydrate, sodium ferrocyanide, sodium nitrate, potassium thiocyanate or 8-hydroxyquinoline sulfate and propyl gallate.
Claim 8
Dependent Claim
33 words
The method of claim 5 wherein the liquid reagent includes one of the salts of 8-quinolinol, dimethyldithiocarbamic acid sodium salt dihydrate, sodium ferrocyanide, sodium nitrate, potassium thiocyanate or 8-hydroxyquinoline sulfate and propyl gallate.
Claim 9
Independent Claim
120 words
A method of manufacturing a plastic identity card capable of developing an inkless fingerprint comprising: (a) providing a substantially non absorbent plastic identity card having preassigned space thereon for receiving a fingerprint of the person identified by the card; (b) mixing a liquid reagent with a chemical compound capable of adhering to the plastic card and providing an ink absorbent coating thereon; (c) applying the mixture of reagent and chemical compound over the preassigned space on the card; and (d) allowing the mixture to dry, the liquid reagent being capable of chemically reacting with a substantially colorless developer solution when impressed on the preassigned space by a finger and providing a perceivable colorant product representative of a fingerprint ridge pattern.
Claim 10
Independent Claim
120 words
A method of manufacturing a plastic identity card capable of developing an inkless fingerprint comprising: (a) providing a substantially non absorbent plastic identity card having preassigned space thereon for receiving a fingerprint of the person identified by the card; (b) mixing a liquid reagent with a chemical compound capable of adhering to the plastic card and providing an ink absorbent coating thereon; (c) applying the mixture of reagent and chemical compound over the preassigned space on the card; and (d) allowing the mixture to dry, the liquid reagent being capable of chemically reacting with a substantially colorless developer solution when impressed on the preassigned space by a finger and providing a perceivable colorant product representative of a fingerprint ridge pattern.
Claim 11
Dependent Claim
24 words
The method of claim 8 wherein the reagent and developer are water soluble inorganic compounds which react to form a non soluble colorant precipitate.
Claim 12
Dependent Claim
21 words
The method of claim 9 wherein the chemical compound includes vinyl resins for bonding to the plastic and a flatting agent.
Claim 13
Dependent Claim
21 words
The method of claim 10 wherein the applying step comprises silk screening the mixture onto the preassigned area of the card.
Claim 14
Dependent Claim
11 words
The method of claim 11 wherein the reagent is propyl gallate.
Claim 15
Dependent Claim
31 words
The method of claim 12 wherein the reagent is a salt of the group consisting of 8-quinolinol, dimethyldithiocarbamic acid sodium salt dihydrate, sodium ferrocyanide, sodium nitrite, potassium thiocyanate, and 8-hydroxyquinoline sulfate.
Claim 16
Dependent Claim
77 words
A plastic identity card capable of providing an inkless fingerprint comprising: (1) a plastic identity card having a space thereon reserved for one or more fingerprints; and (2) an ink absorbent coating disposed over said fingerprint space, said coating containing an intergal mixture of a reagent capable of chemically interacting with a developer solution placed on the coating by a person's finger to provide a perceivable colorant product representative of the ridge pattern of the person's finger.
Claim 17
Dependent Claim
77 words
A plastic identity card capable of providing an inkless fingerprint comprising: (1) a plastic identity card having a space thereon reserved for one or more fingerprints; and (2) an ink absorbent coating disposed over said fingerprint space, said coating containing an intergal mixture of a reagent capable of chemically interacting with a developer solution placed on the coating by a person's finger to provide a perceivable colorant product representative of the ridge pattern of the person's finger.
Claim 18
Dependent Claim
119 words
In a method of developing inkless fingerprints on a nonporous plastic identity card the steps of: depositing a thin metal film over a section of the card of sufficient size to receive a fingerprint the metal film providing a light reflective contrast with underlying layer; applying a liquid developer solution to a finger of a person whose fingerprint is desired on the card, and pressing the finger with the developer solution thereon over the metallic film the developer solution chemically reacting with the metallic film to etch away the metal in contact with the developer solution and expose the underlying surface whereby the contrast between the unetched and etched portion of the metallic layer represents a fingerprint ridge pattern.
Claim 19
Dependent Claim
119 words
In a method of developing inkless fingerprints on a nonporous plastic identity card the steps of: depositing a thin metal film over a section of the card of sufficient size to receive a fingerprint the metal film providing a light reflective contrast with underlying layer; applying a liquid developer solution to a finger of a person whose fingerprint is desired on the card, and pressing the finger with the developer solution thereon over the metallic film the developer solution chemically reacting with the metallic film to etch away the metal in contact with the developer solution and expose the underlying surface whereby the contrast between the unetched and etched portion of the metallic layer represents a fingerprint ridge pattern.
Claim 20
Dependent Claim
45 words
The method of claim 15 wherein the metallic film is deposited on the card by initially applying the metallic film to a mylar backing material and then laminating the mylar with the metallic film thereon to the card so that the metallic film is exposed.
References Cited (Backward Citations)
US1499955A
Cited
US2020376A
Cited
US2712514A
Cited
US3408217A
Cited
US3412493A
Cited
US3664910A
Cited
US4029012A
Cited
US4325570A
Cited
US4557964A
Cited
US4504408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-09 | 1991-05-11 | 1991-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-09 | 1995-05-11 | 1995-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-09 | 1999-05-11 | 1999-11-10 | $7700.00 | Window Closed / Lapsed |