Keyed system for connection of filter cartridge to filter holder
CA 2681655 C · Owner: Reid, Roger P. · Inventors: Reid, Roger P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Embodiments of a key system for filters and their connecting heads/holders are shown. The filter cartridge and its holder each have a keyed surface one being a protruding "key" and one being a recessed "lock". Cooperation of these keyed surfaces is required in order for the filter cartridge to be installed in the holder so that mis-matched cartridges cannot be installed into the holder for example, to prevent a particular type of cartridge from being placed in a filtration or other process where it would be inappropriate or undesired. The keyed surfaces are selectively locate-able preferably at different circumferential locations on a perimeter of the filter and a corresponding location on …
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 August 11, 2001 and granted October 1, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.