Patent US4699077A successfully refreshed from Google Patents.
US4699077A
Expired / Lapsed
US
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Compact fingerprinting system
Assignee: Dactek International Inc
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Filing: 1987-01-28
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Granted: 1987-10-13
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Expires: 2007-01-28
Abstract
Abstract A compact fingerprinting system includes an applicator comprising a sealed packet (13) containing a porous pad (12) impregnated with a solution of water-soluble, color-forming, marking compound, such as iron chloride having a controlled, optimum water content. A print of a body part, such as a finger, is formed by opening the packet (60) and wiping the distal portion of a finger (76) on the pad (62), such as a folded towelette to form a non-visible, latent image pattern. The pattern is transferred to a card (40) which can contain an area (44) impregnated with developer for the marking compound. The developer reacts with the pattern to form a dark, distinct, permanent image (84). The card (40) and packet (13) can be enclosed in an envelope (64) to form a low profile, lightweight, mailable, self-administered fingerprinting system.
Inventors
- 👤 Louis B. Meadows
- 👤 Arthur S. Diamond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:31
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/117; A61B5/1171; A61B5/1172
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
An indentification system comprising in combination: an applicator for applying an aqueous color-forming composition to a body part and a card substrate containing an image-forming portion impregnated with developer for said color-forming compound; said applicator comprising a vapor-proof enclosure containing a porous pad impregnated with a color-forming composition comprising a solution of a color-forming, water-soluble metal salt compound, and said image-forming portion of the card substrate impregnated with a developer comprising a mixture of at least one water-soluble developer compound selected from the group consisting of a polyhydroxy aromatic compound, a quinolinol compound and mixtures thereof with 1 to 10 parts by weight of a viscosity control agent consisting essentially of a water-soluble, dibasic organic acid containing from 8 to 18 carbon atoms.
Claim 2
Dependent Claim
123 words
An indentification system comprising in combination: an applicator for applying an aqueous color-forming composition to a body part and a card substrate containing an image-forming portion impregnated with developer for said color-forming compound; said applicator comprising a vapor-proof enclosure containing a porous pad impregnated with a color-forming composition comprising a solution of a color-forming, water-soluble metal salt compound, and said image-forming portion of the card substrate impregnated with a developer comprising a mixture of at least one water-soluble developer compound selected from the group consisting of a polyhydroxy aromatic compound, a quinolinol compound and mixtures thereof with 1 to 10 parts by weight of a viscosity control agent consisting essentially of a water-soluble, dibasic organic acid containing from 8 to 18 carbon atoms.
Claim 3
Dependent Claim
25 words
A system according to claim 1 in which the acid is azelaic acid and the developer is a mixture of 8 hydroxyquinoline and propyl gallate.
Claim 4
Dependent Claim
15 words
A system according to claim 1 in which the enclosure is an edge-sealed, flexible packet.
Claim 5
Dependent Claim
16 words
A system according to claim 3 in which the pad is a folded sheet of paper.
Claim 6
Dependent Claim
28 words
A system according to claim 4 in which the packet is sealed inward from the edge to provide flaps for gripping the packet during opening the side seams.
Claim 7
Dependent Claim
26 words
A system according to claim 4 in which the pad contains from about 100 to 170 pounds of marking solution per 100 pounds of dry paper.
Claim 8
Dependent Claim
14 words
A system according to claim 6 in which the paper is a creped paper.
Claim 9
Dependent Claim
20 words
A system according to claim 1 in which the water-soluble, metal salt compound is dissolved in a water-soluble organic solvent.
Claim 10
Dependent Claim
37 words
A system according to claim 8 in which the color-forming composition contains 2 to 30 parts by weight of said metal salt, 20 to 100 parts of an organic solvent and 0 to 20 parts of water.
Claim 11
Dependent Claim
29 words
A system according to claim 9 in which the salt is an iron chloride and the solvent is a material selected from glycerine, an alkylene glycol or a polyether.
Claim 12
Dependent Claim
24 words
A system according to claim 10 in which the iron chloride consists of ferric chloride containing 1 to 30% by weight of ferrous chloride.
Claim 13
Dependent Claim
21 words
A system according to claim 11 in which the water content of the composition is from 2 to 8% by weight.
Claim 14
Dependent Claim
40 words
A system according to claim 12 in which the vapor-proof enclosure is in the form of a flexible packet formed of a pair of edge-sealed, barrier films having a water-vapor permeability below 0.5 grams/24 hours/mm thickness/cc Hg at 25° C.
Claim 15
Dependent Claim
14 words
A system according to claim 1 in which the substrate is a fingerprint card.
Claim 16
Dependent Claim
19 words
A system according to claim 11 in which the vapor-proof enclosure is formed on a portion of the card.
Claim 17
Dependent Claim
19 words
A system according to claim 14 in which the packet and card are contained within a common mailing envelope.
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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) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |