Expired Canadian patentCanada
Filter assemblies, filter cartridges and methods for removing filter cartridges from filter assemblies
CA 2521431 C · Owner: Brandt, Jay D. · Inventors: Childs, David M.; Brandt, Jay D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A filter assembly (100) may comprise a filter cartridge (102) and a filter housing (101) which may include a cylindrical support (121) and a removable portion (110).
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
- Filed April 12, 2004 and granted June 5, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2026.
- 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 12, 2004
GrantedJune 5, 2012
Term endedApril 12, 2024
Patent numberCA 2521431 C
Classification (IPC)B01D35/30 +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.