Trace vapour detection
CA 1138044 A · Owner: Pye (Electronic Products) Limited · Inventors: Kraicer, Alec; Bradshaw, Robert F.D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1 00. 1216C, ABSTRACT:, An apparatus for detecting trace quantities of chemical species in the form of vapour by subjecting ions produced in a sample of the mixes gases under flow to an ion repulsive electric field which is directed in the opposite direction to the flow of the gases compris-, ing means such as a fan for drawing the sample through a hollow body, having an inlet, a first region containing means for ionising at least a proportion of the molecules of the sample by a corona discharge, a second region in which the sample is subjected to an oppositely directed ion repulsive electric field and a third region having an electrode for collecting ions of selected polarity. Ions of a …
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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
- Granted December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
- 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.