Rf mass spectrometer
CA 2056709 A1 · Owner: Logan, Charles H. · Inventors: Logan, Charles H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mass spectrometer includes an ion source for ionizing a sample substance to provide an ion current of predetermined beam width and energy. A mass filter includes a plurality of drift tubes wherein succeeding drift tubes are of increasing length separated by gaps that increase in length. The ion current is supplied to the mass filter along with an alternating current electrical signal in a manner so that particles having a predetermined mass receive a predetermined maximum energy increase while traversing the mass filter and so that particles not having the predetermined mass do not receive the maximum energy increase. A detector is provided to create an energy barrier whereby only …
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 29, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2013.
- 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.