Trace evidence collection method and apparatus

Details Trace evidence collection method and apparatus Trace evidence collection method and apparatus

2007-12-04

2007-12-04

Griffin, Walter D. (Department: 1709)

Surgery

Diagnostic testing

Sampling nonliquid body material

C435S307100, C435S309100, C206S438000, C206S210000, C206S219000, C206S363000, C074S025000

Reexamination Certificate

active

10769443

ABSTRACT:
A method for collecting air-transportable evidence samples from objects and clothing: (a) utilizes a collection tube having open upstream and downstream ends, and at a point between these ends a constriction in the cross-sectional area of the tube, (b) utilizes an applicator stick having proximate and distal ends, the length of this stick being less than the length of the collection tube between its constriction and downstream end, and the distal end of this stick having an air permeable tip, (c) places the proximate end of the applicator stick in the upstream end of tube, (d) orients the stick so that its tip is proximate the tube constriction, and (e) imposes a suction force on the downstream end of the tube so that any air-transportable evidence sample proximate the upstream end of the collection tube is sucked into the tube and becomes lodged on the stick's tip.

REFERENCES:
patent: 4211323 (1980-07-01), Olsen
patent: 4707450 (1987-11-01), Nason
patent: 4803998 (1989-02-01), Kexes et al.
patent: 5477863 (1995-12-01), Grant
patent: 5874045 (1999-02-01), Chisum
patent: 6171260 (2001-01-01), Hochmeister et al.
“Crime Investigation,” Paul Kirk, John Wiley & Sons. Inc., pp. 23-25 (1953).

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