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US 5,089,413 AGranted
Method and apparatus for culturing with microbiological dry culture medium
AssigneeMinnesota Mining and Manufacturing Company
InventorsRobert L. Nelson, Paul E.L. Hansen
Life of this patent
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Abstract
A device useful for growing aerobic microorganisms, particularly molds. The device employs a relatively small amount of water-reconstitutable medium that can be sealed in order to prevent desiccation and contamination of the medium yet still provide an adequate supply of air to the medium, by the use of a membrane underlying the medium, to support the growth of aerobic microorganisms.
Claims18
A device for growing microorganisms, which device comprises a body member, which body member comprises
- (1) a waterproof substrate having a top surface and a bottom surface;
- (2) an air-permeable membrane, having its peripheral edge(s) substantially uncovered, and having a top surface and a bottom surface, the bottom surface being fixed to and covering at least a portion of the top surface of the substrate;
- and
- (3) cold-water-reconstitutable dry medium fixed to and covering at least a portion of the top surface of the membrane so as to define a growth region and comprising at least one ingredient selected from the group consisting of one or more gelling agents and one or more nutrients for growing microorganisms.
1 more element
Dependencies are inferred from the claim text.