Flange type duct connector
CA 2035643 C · Owner: Arnoldt, Peter J. · Inventors: Arnoldt, Peter J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A duct connector frame having frame sections with a bottom wall a front wall, a top wall and a rear wall. The rear wall extends downwardly at an angle to the front wall and forms a generally triangular opening in the frame section. A channel shaped pocket ar support member is formed in the opening to receive and support the lower edge of a corner piece leg portion and the rear wall, adjacent the top wall has an , inturned portion that forms a stop within the opening for the upper rear surface of the corner piece leg portion. The support member and the stop maintain the corner piece leg portion in the opening in fixed abutting relation with the rear surface of the frame front wall.
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 February 4, 1991 and granted April 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 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.