Dry break pipe coupling
CA 2033571 C · Owner: Mclennan, William Ross · Inventors: Mclennan, William Ross
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dry-break pipe coupling includes a valve body and a rotary valve such as a butterfly valve plug valve, ball, valve and the like, the valve body and the contained valve having been split transversely in a direction intersecting the Y-Y axis of rotation of the valve into two separate valve body and valve portions, which are separable one from the other when the valve is in a closed position the, respective valve body portions each providing rotational support for the valve portion associated with that valve body portion.
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 3, 1991 and granted September 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 3, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 3, 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.