Apparatus and method for ice blasting
CA 2487309 A1 · Owner: Fisher, Norman W. · Inventors: Fisher, Norman W.; Visaisouk, Sam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus (10) and method for continuously delivering ice particulates (20a) onto a substrate for treating a surface of the substrate. The apparatus includes a refrigerated curved surface (15) that is brought into contact with water to form a thin ice sheet (20) on the surface (15). A doctor-knife (22) intercepts a leading edge of the ice sheet to fragment the ice sheet to produce ice particulates which enter into a tube (30). The particulates are fluidized by air and carried to a hose (52) for delivery through a blasting nozzle (54) under pressure.
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 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2019.
- 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.