Alaskan offshore drilling base
Patent 4420275 Issued on December 13, 1983. Estimated Expiration Date: 
April 19, 2002. 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.
April 19, 2002. 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 1253209 2295422 3374635 System of structures to resist hydrodynamic forces Coating and protective device Patent #: 4102137 InventorAssigneeApplicationNo. 06/369715 filed on 04/19/1982US Classes:405/217, In or on frozen media405/15, BANK, SHORE, OR BED PROTECTION405/18Continuous concrete or concrete filled bagExaminersPrimary: Taylor, Dennis L.International ClassesE02B 17/00 (20060101)E02B 3/08 (20060101) E02B 3/12 (20060101) AbstractA man-made sand and gravel island for Alaskan oil drilling operations, the sides of the island being covered with a porous fabric anchored in place by a layer of heavy (3-ton) sand bags arranged in an imbricated manner between the high and low water levels on the island. | |
