Apparatus and method to deter circumvention of a breath sobriety test
CA 1338112 C · Owner: 936497 Ontario Limited · Inventors: Blair, R. Gregory; Comeau, Felix J.E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method to deter circumvention of sobriety breath tests. As a precondition to passing the test, the invention requires an operator/test subject to apply a suction at the sample delivery port (407) within a predetermined time of delivering a breath sample thereinto. The delay if, any, between the required sucking and the delivery of the breath sample is selected to be short thereby deterring a substitution of gas sources. In this way the invention effectively deters circumvention of sobriety breath tests due to attempts to supply bogus gas samples from a positive pressure gas source incapable of applying a reverse pressure gradient.
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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 March 5, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 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.