Liquid-separate-film device for sucking and exhausting the fume
CA 2404789 C · Owner: Hong, Chong-Guang · Inventors: Hong, Chong-Guang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid-separate-film device for sucking and exhausting fume includes a , pressured liquid outlet, which is located on one side of the diffusing surface of the fume's source and parallel with the diffusion surface, and a suction , liquid inlet connected with a suction-produce device which is located on the , opposed side and also parallel with the diffusion surface. The liquid flowing from the said outlet to said inlet forms liquid-separate film which can , separate the fume's source from outer air by the fume's path between the said outlet and said inlet. The invention , can find its use in bi-directional separation in the industry to exhaust the fume on the fume's source. The …
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 May 22, 2001 and granted March 22, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 22, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 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.