Method and apparatus for the automated testing of vehicle fuel evaporation control systems
CA 2088030 C · Owner: Environmental Systems Products, Inc. · Inventors: Timmerman, George; Rogers, John N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for the testing of a vehicle fuel evaporation control system, which typically includes a fuel tank vapor adsorption canister and purge valve consisting of the, introduction of a non-reactive gas into the control system and the subsequent monitoring of the engine exhaust during operation for presence of the gas. The operating parameters of the engine may be varied to determine parameter-associated operation of the control system. In addition, the quantity of gas admitted into the system may be compared to that exiting the exhaust to provide a quantitative measurement of the integrity of the control system.
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 January 25, 1993 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2015.
- 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.