Evacuation and inert gas introduction apparatus
CA 2339606 C · Owner: Nagoya University · Inventors: Kitamura, Masato; Noda, Toshiaki; Katsuki, Masumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The evacuation and inert gas introduction apparatus capable of quickly switching over between the evacuation state and the inert gas introduction state, is provided for a synthesizing device for molecular asymmetrical catalysts. The evacuation line is connected to a vacuum pump via a cock and solvent trap. The inert gas introduction line is connected to an argon gas cylinder via a cock. The vacuum cavity is provided at a tip end of the housing of the three-way cock, and thus the inside plug is attracted towards the vacuum cavity. The evacuation line is connected to the first port of the three-way cock, the inert gas introduction line is connected to the second port and the each reaction …
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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 7, 2001 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 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.