Devices for treating gaseous material
CA 1100294 A · Owner: Dragerwerk Aktiengesellschaft · Inventors: Pantaleon-Stemberg, Gerd; Eckstein, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for treating gaseous material comprising a housing, a chemical treating substance arranged in layers in said housing for reacting with a constituent of said material, screens in said housing alternating with said layers, and a conduit for conducting said material extending through said layers and having a peripheral wall which within said substance, is formed, with perforations. Such a device finds application for gas purification in closed-circuit breathing apparatus.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 5, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.