Roller elements for playground slides
CA 2028202 A1 · Owner: Shiratori, Koji · Inventors: Shiratori, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1. A roller element for a slide comprising an outer cylinder, an inner pipe and connector members for making connections therebetween all integrally formed of a material having a suitable elasticity, wear resistance weather, resistance, etc. wherein the outer cylinder has a thickness sufficient to make it deformable, and stopper slightly shorter than the space formed between the outer cylinder and the inner pipe are provided to limit the amount of deformation of the outer cylinder, alternatively ribs for connector members which are connected to the outer cylinder and inner pipe on a reduced-diameter side of the outer cylinder, and connected to the inner pipe alone on an increased-diameter …
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 22, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 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.