High voltage spark excitation and ionization detector system
CA 2081572 C · Owner: Valco Instruments Company, Inc. · Inventors: Wentworth, Wayne E.; Stearns, Stanley D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spark detection apparatus is set forth and incorporates a closed chamber (21) for receiving a carrier gas (12) flowing therethrough between inlets (18) and outlets (36) and the carrier gas (12) is exposed to a pair of electrodes (31 32) forming a, spark across the chamber (21) and through the carrier gas. Compounds of interest interact with the spark. The spark forms a diffusion of electrons or alternately ions during the spark distributed thereafter. The chamber (21) includes a detector electrode (26) spaced from the spark. High mobility particles (primarily electrons) are observed almost instantaneously with the spark while low mobility ionic particles diffuse more slowly after the …
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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 February 28, 1992 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2014.
- 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.