Mass spectrometer with high ionization efficiency
CA 2345380 A1 · Owner: Siemens Applied Automation, Inc. · Inventors: Arnold, Robert W.; Beu, Steven C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The ionization efficiency of a mass spectrometer is increased by creating a potential well between the electron source (12) and the electron collector (20). The potential well is created by applying to the collector a reflection potential having an amplitude which is the same as or substantially the same as the amplitude of the potential applied to the electron source and a polarity which is the same as the polarity of the electron source potential. The potentials applied to the electron source and electron collector are relative to the ionization region effected between the source and collector. Many of the electrons produced by the electron source oscillate back and forth in the …
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 October 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 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.
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.