Mass spectrometry method using filtered noise signal
CA 2125874 C · Owner: Kelley, Paul E. · Inventors: Kelley, Paul E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mass spectrometry method in which a trapping field signal (such as a threedimensional quadrupole trapping field signal or other multipole trapping field signal) set to store ions of interest is superimposed with a notch-filtered broadband ("filtered noise") signal, and ions are formed or injected in the resulting combined field. The filtered noise signal resonates all ions (except selected ones of the ions) from the combined field so that only selected ones , of the ions remain trapped in the combined field. The combined filtered noise and trapping field signal (the "combined signal") is then changed to excite the trapped ions sequentially, so that the excited ions can be detected …
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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 November 10, 1992 and granted June 4, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2014.
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Timeline
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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.