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Expired Canadian patentCanada

Improved method of reducing the effects of background noise in mass spectra

CA 2490509 C · Owner: Micromass Uk Limited · Inventors: Richardson, Keith; Denny, Richard; Skilling, John

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Abstract From the Canadian patent

A mass spectrometer and a method of mass spectrometry are disclosed wherein periodic background noise is effectively filtered out from the mass spectral data. An overall mass window is superimposed upon the mass spectral data. The overall mass window preferably comprises 21 nominal mass windows each preferably having a width of 1.0005 amu. Each nominal mass window preferably comprises 20 channels. An intensity distribution relating to all the first channels of the 21 nominal mass windows is determined. An intensity quantile is determined from the intensity distribution. The intensity quantile is taken to represent the background intensity in the first channel of the central …

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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 December 17, 2004 and granted March 4, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2024.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 17, 2004
GrantedMarch 4, 2014
Term endedDecember 17, 2024
Patent numberCA 2490509 C
Classification (IPC)G01N30/72 +2 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedDec 17, 2004Patent grantedMarch 4, 2014Term endedDec 17, 2024

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.