Artificial roller skating/blading surface
CA 2087554 A1 · Owner: Gray, Todd · Inventors: Gray, Todd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An artificial skating/blading surface is disclosed for roller skating or roller blading, which is particularly suited to the playing of team sports thereon. The skating surface includes a substantially flat central portion a wall, portion, and an upwardly curved portion providing a smooth transition between the central portion and the wall portion. The upwardly curved portion has a generally elliptical crosssection, which permits the wall portion to form an integral part of the playable surface area. In addition the wall, portion can be transparent so as to permit an unobstructed spectator's view of the game. The central curved and wall, portions of the skating surface cooperate to …
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 January 19, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 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.