Modular oxidation chamber
CA 2093016 C · Owner: Vulcan Peroxidation Systems Inc. · Inventors: Hager, Donald G.; Peterson, Ronald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oxidation chamber used for irradiating an incoming liquid containing unwanted organic pollutants has a structure that facilitate automatic self-cleaning at intervals. A modular construction is used and three basic types of modules (12, 14 and 16) are employed. One of the modules (16) is a TEFLON~lined carbon steel pipe through which a shutting scraper is forced at interval. The shuttling scraper includes an annular wiper (60) that simultaneously cleans the inside surface of the surrounding tubular module ( 16) as well as the outside surface of an enclosed quartz tube (36). The annular wiper sealingly engages the quartz tube and the tubular module so that it is driven like a piston by the …
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
- Filed July 31, 1992 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2014.
- 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.