Gas chromatography system and methods
CA 2069734 C · Owner: Klemp, Mark · Inventors: Sacks, Richard; Klemp, Mark; Rankin, Christine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Gas chromatography apparatus (10) and procedures are described which enables gas chromatography to be carried out more rapidly than in accordance with prior art techniques and further enables chromatogram peaks caused by materials of interest from being obscured due to their superposition upon high long duration peaks produced by other components in an organic mixture. A principal aspect of the invention is to cause a reversal in the flow direction through the column (32) to occur at or just after a high intensity long duration peak caused by some components of the mixture have eluted causing the remaining components to be drawn back into a thermal focusing chamber (14) for subsequent …
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 September 27, 1991 and granted December 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2013.
- 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.