Ladder, kit and leaning support for ladders
CA 2115752 A1 · Owner: Busenhart, Edwin · Inventors: Busenhart, Edwin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Ladders (1) are equipped with a leaning support (20) during production or as an accessory, so that according to the use of the ladder (1), they may be set up and used with a leaning element for flat walls (5), for example even for glass surfaces or inner (21) and outer (22) corners of walls as, well as for large columns, in a safe and non-damaging manner. The invention allows people to work on a ladder with a safety against accidents which was hitherto impossible to achieve and without damaging building components vehicles, aircraft, ships and furniture.
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 June 15, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2015.
- 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.