Mass spectrometer
CA 2412656 C · Owner: Micromass Limited · Inventors: Brown, Jeff; Gilbert, Anthony James; Bateman, Robert Harold
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mass spectrometer is disclosed comprising a mass selective ion trap such as a 3D quadrupole field ion trap upstream of a pusher electrode 1 of an orthogonal acceleration Time of Flight mass analyser. According to a first embodiment bunches of ions are released from the ion trap and the pusher electrode 1 is energised after a delay time which is progressively varied. According to a second embodiment ions are released from the ion trap in reverse order of mass to charge ratio with the ions having the largest mass to charge ratio being released first. By appropriate release of the ions from the ion trap it is possible to ensure that substantially all of the ions arrive at the pusher …
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 November 22, 2002 and granted April 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2024.
- 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.