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Expired Canadian patentCanada

Reverse-osmosis tubular membrane

CA 1165249 A · Owner: Abcor Inc. · Inventors: Roos, Martin; Cooper, William W. Iv; Eykamp, William

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 membrane module which includes a unitary curved, backing support, which retains all the U bends serially connecting the membrane tubes in a, sealing relationship, and which includes an annular permeate-collector ring system at the end of each membrane tube and channels with a permeate manifold passageway, to provide efficient removal and easy cleaning of the permeate flow path.

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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 April 10, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1981
GrantedApril 10, 1984
Term endedApril 10, 2001
Patent numberCA 1165249 A
Classification (IPC)B01D61/02 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedApril 30, 1981Patent grantedApril 10, 1984Term endedApril 10, 2001

Sources & verification

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