Automated trowelling system
CA 2203773 C · Owner: Jacques, Jonathan · Inventors: Jacques, Carol
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automated trowelling system (10) for providing a smooth even finish to one , or both sides of a wall (12). The present system smooths wet surface materials such as concrete or plaster quickly and consistently with minimum manual intervention. Horizontal brackets (30, 32) on the wall (12) support a horizontally translating column (22) and an associated vertically reciprocating trowel (34). A first motor (28) propels the column (22) and trowel laterally along the wall (12), while a second motor (38) effects vertical motion. A forward scoop (42) removes excess wall finishing material ahead of the reciprocating trowel (34) and a nonreciprocating finish trowel , (44) follows the …
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 October 10, 1995 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2017.
- 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.