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A self contained protective enclosure with an opening for entry and egress and a screen for ventilation and viewing.

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Number of patents: 1
Last date: November 23, 1993

Number	Title	Issue Date
5264630	Halo-substituted thiobutanals Compounds of formula I ##STR1## wherein R is C1 -C4 alkyl or benzyl, are prepared by reacting a butanal of formula II ##STR2## wherein X and Y are each independently of the other chloro, bromo or iodo, in an inert solv...	11/23/1993