Pig safety device
CA 2097939 C · Owner: Berger, Martin H. · Inventors: Berger, Martin H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A safety device for automatically preventing an injectile propelled within a pipeline having a terminus from inadvertently escaping the pipeline at a coupling point. The safety device automatically engages upon decoupling, thereby safe-guarding the pipeline operator and surrounding area from injury and/or damage due to injectiles that have been previously injected within or passed through the pipeline and that could otherwise inadvertently escape the pipeline upon decoupling. A preferred embodiment of the present invention comprises a base, means for clamping and means for automatically halting the progress of the injectile. One embodiment of the present invention further comprises means …
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 June 8, 1993 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 8, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 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.