Extruded aluminum plank
CA 2179484 C · Owner: Lubinski, Ronald · Inventors: Lubinski, Ronald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plank for use on a scaffold. The principal component is a hollow integral aluminum extrusion with an elongate rectangular shape transverse to its length. The extrusion has a top wall a pair of spaced-apart, opposing sidewalls extending downwardly from the top wall and a longitudinal, locking structure located between the sidewalls. A complementary fastening assembly cooperates with the locking structure to secure the extrusion to a horizontal cross-member of the scaffold. Sheet material containing mineral particulates is adhered to the upper surface of the extrusion to provide a non-slip walking surface. After use in an environment containing dangerous contaminants, such as radioactive …
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 November 26, 1990 and granted June 20, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2012.
- 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.