Gas introduction apparatus and gas analyzer
CA 2429281 A1 · Owner: Iwasaki, Toshio · Inventors: Iwasaki, Toshio; Fujita, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Prior to initiation of gas analysis, a first vacuum valve and a second vacuum valve are closed while a third vacuum valve is opened, then an introduction pipe and a branch pipe are evacuated by a vacuum pump the third vacuum valve is closed while the first vacuum valve 22 is opened so as to introduce and reserve gas to be analyzed into and in the gas introduction pipe when luggage 16 is set in a luggage receiver and the, second vacuum valve is opened so as to feed the gas to be analyzed from the introduction pipe into a mass spectrometer for gas analysis.
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 21, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 21, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2025.
- 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.