Icebreaking apparatus
CA 1075537 A · Owner: Exxon Production Research Company · Inventors: Jahns, Hans O.; Wheeler, Joe D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In its most preferred embodiment the invention relates to a water navigable vessel, having ice-breaking means comprising an iceriding, forward portion, e.g. bow structure and ice-gripping pulling or, dragging means preferably rotatable screw means attached to said ice-, riding portion of said vessel. Said ice-gripping means is in a cooperative relationship with the vessel's icebreaking bow structure whereby when said vessel is, positioned in an ice-covered body of water said ice-breaking means will break said ice in flexure when the ice-gripping means are activated (e.g. screw means are rotated) thereby permitting either retention of position of said vessel or movement of said vessel within …
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
- Granted April 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 1997.
- 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.