Sample introduction system for spectrometers
CA 2013789 C · Owner: Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Energy, Mines, And Resources · Inventors: Guevremont, Roger; De Silva, K. Nimalasiri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for introducing a sample to an analyzing device such as a, spectrometer, wherein the flow rate of gas to the analyzing device is maintained substantially constant and uncontaminated during sample changeover. The system comprises flow control means and flow control paths arranged to avoid having any flow diverting valves or direction change in the analyte flow path.
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 April 4, 1990 and granted January 27, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2012.
- 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.