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US 5,208,161 AGranted
Filter units
AssigneePolyfiltronics N.A., Inc.
InventorsAnthony J. Saunders, Roy L. Manns
Life of this patent
Estimating the term…
Abstract
An assay filter unit where the filter of the unit is sealed into the body of the unit to prevent any passage of material to be assayed round the edge of the filter but is removable by breaking out a filter support grid along a predetermined line of weakness, together with the filter, for assay of material retained on the filter.
Claims10
An assay filter unit for filtering a sample and comprising, in combination:
- a body having an internal passageway:
- a filter disposed within said passageway;
- a filter support means for supporting said filter and seal within said body so as to prevent passage of any of said sample around the edges of said filter, and provided with a line of mechanical weakness disposed peripherally about said support means so that said filter is removable from said body by breaking said support means along said line.
A filtration assembly, comprising, in combination, a plurality of assay units, each comprising:
- a body having an internal passageway:
- a filter disposed within said passageway;
- a filter support means for supporting said filter and seal within said body so as to prevent passage of any of said sample around the edges of said filter, and provided with a line of mechanical weakness disposed peripherally about said support means so that said filter is removable from said body by breaking said support means along said line;
- said units being stacked for passage of filtrate therethrough from one to successive units.
1 more element
Dependencies are inferred from the claim text.