Expired Canadian patentCanada
Double-ended hollow fiber permeator
CA 1285890 C · Owner: Edwards, Donald W. · Inventors: Edwards, Donald W.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE, Double-Ended Hollow Fiber Permeator ABSTRACT, A double-ended permeator. Permeate is extracted from both ends of a fiber bundle and discharged at one end only of a permeator.
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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 July 9, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 9, 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.
FiledJune 26, 1986
GrantedJuly 9, 1991
Term endedJuly 9, 2008
Patent numberCA 1285890 C
Classification (IPC)B01D63/04 +2 more
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.