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Expired Canadian patentCanada

Quick change reverse osmosis assembly

CA 1281295 C · Owner: Regunathan, Perialwar · Inventors: Thomsen, Jack W.; Regunathan, Perialwar

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A reverse osmosis system for water treatment including a head member adapted to be fixedly mounted in a fluid supply line, an integral disposable reverse osmosis unit inserted into said head member, said osmosis unit including a pressure vessel, an end member attached to said pressure vessel and a reverse osmosis membrane module disposed in said pressure vessel and operatively associated with said end member.

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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 March 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 13, 1986
GrantedMarch 12, 1991
Term endedMarch 12, 2008
Patent numberCA 1281295 C
Classification (IPC)B01D63/06 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedAug 13, 1986Patent grantedMarch 12, 1991Term endedMarch 12, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.