Expired Canadian patentCanada
Filtration apparatus
CA 1287974 C · Owner: Swiss Aluminium Ltd. · Inventors: Heamon, Mark L.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved filtration apparatus including a filter chamber having a metal inlet and a metal outlet defining a molten metal flow path therebetween and a filtration assembly engageable therewith disposed between the inlet and the outlet.
Read the whole patent
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 August 27, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 27, 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.
FiledOctober 16, 1986
GrantedAugust 27, 1991
Term endedAugust 27, 2008
Patent numberCA 1287974 C
Classification (IPC)C22B9/02 +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.