Breakaway utility pole buried base structure
CA 1300845 C · Owner: Lewis, John R. Jr. · Inventors: Mclain, Philippe H.; Lewis, John R. Jr.; Parsons, James H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A breakaway utility pole structure having a tubular base (11) buried in the ground with its upper end portion (11' 16, 20), substantially at ground level and adapted telescopically to enclose the lower end portion (10) of a pole (9) and, an adhesive material (14) bonding said pole end portion (10) to said base upper end portion (11', 16, 20), the adhesive material (14) being adapted to fail whensaid pole (9) is subject to an impact at a predetermined distance above ground level from a vehicle of predetermined minimum weight moving at a predetermined speed.
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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
- 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.