Apparatus for heating pipe
CA 2004221 C · Owner: Cis-Can Industries Ltd. · Inventors: Kirby, Alan Cameron
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for heating a length of pipe and/or sleeve mounted thereon includes a main frame defined by a pair of posts for mounting on the pipe on each side of the area to be heated and a guide bar extending between the top ends of the posts parallel to the pipe; a screw extending between the posts above the pipe in the use position; a carriage mounted on the screw for movement longitudinally of the pipe when the screw is rotated, a bifurcated heater carrier frame, the arms of which are pivotally connected to the carriage for rotation between an open position and a closed position in which the heaters surround the pipe and any sleeve mounted thereon, whereby, with the heaters in …
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 November 29, 1989 and granted November 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2011.
- 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.