Apparatus and method for performing external surface work on ship hulls
CA 2125851 A1 · Owner: Metro Machine Corp. · Inventors: Mcconnell, Frank E.; Hoffman, Joseph H.; Wagner, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dry, particulate abrasive for use in abrasive blast cleaning of a ship hull 16 26 is, supplied to blasting pots 36 from abrasive supply hopper assemblies 38, 40 lifted into place from a recycling station 34. Spent abrasive, with debris is, collected and placed on a conveyor belt 28 extending parallel to the keel blocks 18, for conveying the collected material to the recycling station 34. There the collected material is processed to remove undersized and foreign material from the reuseable abrasive grit. The latter is loaded into supply hopper assemblies 38, 40, which are crane-lifted back into supplying relation with respective blasting pots 36. By preference, the abrasive blasting work …
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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 14, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 2016.
- 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.