Modular conduit unit
CA 1086665 A · Owner: Domtar Inc. · Inventors: Bignell, Evan S.W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The modular conduit unit formed from at least four conduits secured together in spaced relationship by means of a plurality of spaced star-shaped spacer elements. The star-shaped spacer elements are each formed with four equally spaced hollow projections that terminate in end walls and have curved side walls. The curved side walls of adjacent projections merge to form outer walls of the element that are in the form of cylindrical segments. An integral reinforcing member interconnects said outer walls at points spaced from said end walls and a line of weakness is found in each of said end walls and extends substantially longitudinally of the cylindrical segments. The line of weakness …
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
- Granted September 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 30, 1997.
- 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.