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Expired Canadian patentCanada

Purified water storage system

CA 1254159 A · Owner: Wetco Of Delaware, Inc. · Inventors: Solomon, Donald F.

CIPO record

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

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Abstract From the Canadian patent

A water tank for holding purified water from a reverse osmosis water purification system comprises a container having two connected chambers one of which, contains a flexible bladder. The second chamber has a volume of at least 75% of the first chamber and is used, to enable a large pressure drop to be maintained across the reverse osmosis membrane as the bladder fills.

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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 May 16, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 16, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 30, 1985
GrantedMay 16, 1989
Term endedMay 16, 2006
Patent numberCA 1254159 A
Classification (IPC)B01D61/10

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedDec 30, 1985Patent grantedMay 16, 1989Term endedMay 16, 2006

Sources & verification

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