Thermostatically controlled mixing valve
CA 2196228 C · Owner: Macdonald, Robert · Inventors: Macdonald, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thermostatically controlled mixing valve having a modular cartridge mounted in a housing. The cartridge comprises a tubular sleeve having rotatably disposed therein a hollow cylindrical housing. The bottom of the cylindrical housing has a volume control valve plate attached against rotational movement thereto. The volume control valve plate cooperates with a fixed valve plate with which it is in surface-to-surface contact to control the volume of water flowing into the cartridge. The fixed valve plate is affixed against rotational movement to a nose piece which is fixedly attached to the bottom of the tubular sleeve. An inner housing is disposed within the hollow cylindrical housing and …
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 March 13, 1992 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2014.
- 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.