An improved ice surface
CA 2249770 A1 · Owner: Vaillancourt, Wilf · Inventors: Vaillancourt, Wilf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a method of resurfacing an ice surface to reduce friction between the ice and an object gliding on the ice surface. The steps comprise mixing an effective amount of lubricant with water coating the ice surface with the mixture and allowing the mixture to freeze, to form a new ice surface. In particular the lubricant is derived from, siloxane. In the preferred embodiment the lubricant is a composition, derived from polydimethysiloxane and copolyolamine. In the preferred embodiment, the ratio of water mixed with the lubricant is 300:1. This invention also provides for the use of the composition as an agent to reduce friction between an ice surface and an object …
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 7, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2020.
- 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.