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Expired Canadian patentCanada

Method and apparatus for the correction of mass errors in time-of-flight mass spectrometry

CA 2283139 C · Owner: Cottrell, Jonathan Charles · Inventors: Cottrell, Jonathan Charles; Hoyes, John Brian

CIPO record

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Abstract From the Canadian patent

A method of correcting mass-spectral data acquired using a time-of-flight mass spectrometer (1) is disclosed comprising recognising in an observed mass spectrum the mass peaks and determining the observed peak area and mass centroid. Then, using a correction table the observed mass centroid is , corrected for the effect of detector dead-time. The correction table is generated using a Monte Carlo simulation.

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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 January 25, 1999 and granted March 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2021.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 25, 1999
GrantedMarch 25, 2003
Term endedJanuary 25, 2019
Patent numberCA 2283139 C
Classification (IPC)H01J49/00 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedJan 25, 1999Patent grantedMarch 25, 2003Term endedJan 25, 2019

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