Icebreaker
Patent 5038695 Issued on August 13, 1991. Estimated Expiration Date: 
March 9, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 9, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3690281 Rudder for aquatic craft and floating apparatus Patent #: 4307677 InventorApplicationNo. 320897 filed on 03/09/1989US Classes:114/40, ICE BREAKERS114/61.29And specific aftbodyExaminersPrimary: Basinger, Sherman D.Foreign Patent References
International ClassB63B 035/08Foreign Application Priority Data1987-03-10 EPAbstractFor improving the headway and sternway icebreaking characteristics, the hull of a ship has the greatest width of the icebreaking waterline in the forebody and has trimming and ballasting in the stern area, whose part located above the icebreaking waterline is widened to such an extent that on lowering the afterbody by trimming or ballasting during sternway travel, a channel is broken in the ice cover, which is wider than the wide forebody part passing through said channel during sternway travel. | |
