Expired Canadian patentCanada
Ceramic packing and method and mold for making same
CA 1289461 C · Owner: Sulzer Brothers Limited · Inventors: Kubicek, Vladimir
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The ceramic packing is cast in one piece and comprises parallel corrugated layers which extend substantially transversely to the longitudinal direction of the packing with at least two joins provided between the adjacent layers.
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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 September 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 24, 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.
FiledJuly 17, 1986
GrantedSeptember 24, 1991
Term endedSeptember 24, 2008
Patent numberCA 1289461 C
Classification (IPC)F28F25/02 +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.