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Expired Canadian patentCanada

Hollow fiber bushing and hollow fiber tip construction

CA 1270650 C · Owner: Jensen, Thomas H. · Inventors: Jensen, Thomas H.

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 bushing support system for anchoring hollow fiber forming tips in a fiber glass bushing is described. The truss like support for the air tubes and bushing tips insure minimal movement of the tips during bushing operation and that any movement is accompanied by corresponding movement of their tubes to thereby maintain the initially established concentricity of tube wall to tip wall when the tubes are positioned in the interior of the tips.

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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 June 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
  • 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 12, 1987
GrantedJune 26, 1990
Term endedJune 26, 2007
Patent numberCA 1270650 C
Classification (IPC)C03B37/02 +1 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedAug 12, 1987Patent grantedJune 26, 1990Term endedJune 26, 2007

Sources & verification

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