Method for changing the characteristics of a ship and a hull form of an icebreaking ship
CA 2107590 C · Owner: Mattila, Reijo · Inventors: Mattila, Reijo; Eronen, Harri; Harjula, Arjo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for improving the seakeeping characteristics of an icebreaking ship (20) so that the breadth of the ship's hull (21) will be decreased on the aft wide foreship (65) in the vicinity of the water line (22). It can be implemented with solid hull form or so that on the side of the hull there is a section (30) removable with respect to the solid hull location or position of which, will be changed with respect to the hull. In the solid structure on side of the hull there will be formed a recess (60) and above it a reamer (70), rising towards the stern and formed by a sloping surface (71). The recess forms a pass between the bilge keel (24) and the reamer becoming wider towards the stern …
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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 April 6, 1992 and granted September 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2014.
- 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.