Combined reusable extractor-stopper for laboratory glassware

Description

FIG. 1 is a top perspective view of a combined reusable extractor-stopper for laboratory glassware, showing my new design.

FIG. 2 is a top plan view of the extractor-stopper.

FIG. 3 is a cross-section view of the extractor-stopper taken along line III--III of FIG. 2.

FIG. 4 is a bottom plan view thereof.

The broken line disclosure of a portion of a flask in FIG. 3 is for illustrative purpose only and forms no part of the claimed invention.