Method and apparatus for making snow
CA 2068417 A1 · Owner: Melbourne, John Stanley · Inventors: Melbourne, John Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A snow making apparatus comprising a housing defining a bore (14) which is open at least at one end and having first and second annular chambers (38, 32) which extend circumferentially of the bore. The first and second chambers (38 32) are respectively, connectable to a source of pressurised water and of pressurised air. A circumferential array of outlets (42) from the first chamber (38) are operable with pressurised water supplied by chamber (38) to direct water jets along and towards the axis of the bore. A circumferential array of passages (36) provide communication between the second chamber (32) and the bore (14) each passage (36), opening towards or beyond the one end of the bore …
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 August 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 22, 2013.
- 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.