Reverse osmosis apparatus
CA 1324766 C · Owner: Holzer, Joseph C. · Inventors: Brown, Barry M.; Holzer, Joseph C.; West, Henry L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A reverse osmosis member cartridge unit 10 for a drinking-water purification system is disclosed. The reverse osmosis membrane cartridge unit 10 includes a reverse osmosis membrane permeator 11 spirally wound on a central winding tube 12 and surrounded by an impermeable barrier layer 15 which is, in turn, surrounded by a spirally wound prefilter 16. A postfilter 30 is placed centrally within the winding tube 12. The cartridge unit 10 is designed for functional installation in a housing tube 44 fastened and sealed to a valve plate 45 at one end and closed by a removable end cap 46 at the other or outboard end. Feed water enters the cartridge unit through an inlet …
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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 November 30, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 2010.
- 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.