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US 4,382,064 AGranted
Specimen slide for occult blood testing
AssigneeSmithKline Instruments, Inc.
InventorsMichael B. Detweiler, Paul J. Lawrence, Charles W. Townsley
Life of this patent
Estimating the term…
Abstract
Specimen test slides for occult blood having a receiving sheet between a front panel and a rear panel with openings in the front and rear panels and pivotal covers coated with 2,6-di-tert-butyl-p-cresol to cover said openings.
Claims4
In a specimen test slide for occult blood having a front panel, a rear panel, said front panel having a plurality of openings, a specimen receiving sheet carrying a guaiac test reagent between the front and rear panels, pivotal covers in said front and rear panels opposite said openings, the improvement comprising:
- said pivotal covers being coated with a composition containing 2,6-di-tert-butyl-p-cresol.
Dependencies are inferred from the claim text.