| US 7,468,272 B2 | ||
| Biological soil detector | ||
| Sailaja Chandrapati, Woodbury, Minn. (US); Bernard A. Gonzalez, St. Paul, Minn. (US); Bonnie J. Hovde, Woodbury, Minn. (US); and Kevin D. Landgrebe, Woodbury, Minn. (US) | ||
| Assigned to 3M Innovative Properties Company, St. Paul, Minn. (US) | ||
| Filed on Oct. 18, 2004, as Appl. No. 10/967,394. | ||
| Application 10/967394 is a continuation in part of application No. 10/842599, filed on May 10, 2004. | ||
| Prior Publication US 2005/0250089 A1, Nov. 10, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. C12N 1/34 (2006.01) | ||
| U.S. Cl. 435—287.4 [435/288.5; 210/206] | 25 Claims |
| 1. A biological soil detector, comprising:
A solid support member;
A specific indicator immobilized on the solid support member, the specific indicator comprising a material sensitive to the
presence of blood;
The solid support and specific indicator positioned with respect to the detector to facilitate contact with a liquid that
has been used to contact a surface; and
A retaining member supporting the solid support member and the specific indicator, the retaining member positioned to facilitate
contact between the liquid and the solid support member, wherein the retaining member comprises a structure which channels
the liquid therethrough, the solid support and specific indicator positioned within or on the retaining member to facilitate
contact between the liquid and the solid support member when the liquid is channeled through the retaining member; and wherein
the retaining member is a tubular member having a fluid inlet through which the liquid enters the retaining member and a fluid
outlet through which the liquid exits the retaining member.
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