Heat transfer cement containment channel
CA 2043265 C · Owner: Heizer, Glenwood Franklin · Inventors: Heizer, Glenwood Franklin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heat transfer cement containment channel is provided for attachment to a pipe. The containment channel includes a channel member having a first end and a second end and is dimensioned, to fit on a pipe and provide a space between the channel member and the pipe for heat transfer cement. A collar member is integrally attached to the first end of the channel member and extends away from the channel member. The collar is dimensioned to fit snugly over the second end of an adjacent channel member in a longitudinal arrangement of a series of containment channels on a pipe.
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 May 24, 1991 and granted May 21, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 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.