Method and apparatus for leak testing
CA 2648041 C · Owner: Wilco Ag · Inventors: Lehmann, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a technique for leak testing closed and filled containers a method for producing closed and filled containers and a leak testing apparatus. One aspect of the invention provides a method for leak testing at least one closed container comprising applying a pressure difference across at least a part of the wall of the container which part is to be leak tested, and monitoring the pressure on one side of the wall over a test time period as a leak indicative signal and the method including: establishing a pressure reference signal; generating a dynamic signal range that represent an acceptable change across the part during the test period with respect to the pressure …
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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 March 10, 1998 and granted April 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2020.
- 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.