Distribution valve assembly
CA 2236812 C · Owner: Cheng, Chien-Chuan · Inventors: Cheng, Chien-Chuan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A distribution valve assembly, particularly to a compact valve which can distribute the air from a single air inlet to a plurality of air outlets comprises a. valve housing and a binding air-duct housing. The valve housing further comprises a plurality of electromagnetic valves to form several independent air-flow devices with corresponding air passages to the air-duct housing. Each independent air-flow device further comprises a first air passage and a second air passage, and a penetrating passage is constructed to connect all second air passages. The penetrating passage has an air inlet connecting a pump at one end and a drain valve at another end. fir flow inside the penetrating valve …
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 June 9, 1998 and granted January 8, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2020.
- 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.