Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB11554/29A
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Individual
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Individual
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Publication of GB309914ApublicationCriticalpatent/GB309914A/en
A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B21/00—Devices for producing oxygen from chemical substances for respiratory apparatus
Abstract
309,914. Horak, V., (Assignee of Horak Apparatenfabrik, V.). April 17, 1928, [Convention date]. Respiratiors.-Filtering insertions for gas masks are made from a pulp comprising fibrous material, e.g. cellulose, cotton wool or waste, rags &c., powdered active carbon and water, the pulp being moulded preferably to a hollow form and dried. The insertion may be used in conjunction with a chemical filter.
GB11554/29A1928-04-171929-04-15Filtration material for gas masks
ExpiredGB309914A
(en)