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Class Information
Number: 405/207
Name: Hydraulic and earth engineering > Marine structure or fabrication thereof > Floatable to site and supported by marine floor > With ballasting means to sink or position structure at site > Compartment in base
Description: Method or apparatus wherein the construction includes and is supported upon a foundation within which is located the buoyant compartment(s), which foundation, or one or more elongated columnar members suspended therefrom, contacts the earthen bed underlying the body of water.

Sub-classes under this class:

Class Number Class Name Patents
405/208 And leg depending from base 31

Patents under this class:
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Patent Number Title Of Patent Date Issued
8657533 Gravity base structure Feb. 25, 2014
8647017 Gravity base structure Feb. 11, 2014
8540459 Structure for loading and unloading at least one fluid transport ship Sep. 24, 2013
8449222 System for and method of installing foundation elements in an underwater ground formation May. 28, 2013
7824131 Building over the water, group of buildings, their maneuvering methods and their hosting sites Nov. 2, 2010
7503728 Stabilized floating support Mar. 17, 2009
7086809 Minimum floating offshore platform with water entrapment plate and method of installation Aug. 8, 2006
7044685 Method of installation of a tension leg platform May. 16, 2006
7001108 Mat supported offshore structure Feb. 21, 2006
6945736 Offshore platform for drilling after or production of hydrocarbons Sep. 20, 2005
6869251 Marine buoy for offshore support Mar. 22, 2005
6652192 Heave suppressed offshore drilling and production platform and method of installation Nov. 25, 2003
6564873 Apparatus for offshore production of hydrocarbon fluids May. 20, 2003
6409431 Submersible floating dock Jun. 25, 2002
6305881 Barge stabilization method Oct. 23, 2001
6276876 Offshore exploration or production operation Aug. 21, 2001
6196767 Jack-up platform having a submerged tank and methods for installing and raising the tank Mar. 6, 2001
6015245 Semisubmersible offshore vessel Jan. 18, 2000
6012873 Buoyant leg platform with retractable gravity base and method of anchoring and relocating the same Jan. 11, 2000
5379559 Semisubmersible building Jan. 10, 1995
5316413 Offshore double cone structure May. 31, 1994
5292207 Ice crush resistant caisson for arctic offshore oil well drilling Mar. 8, 1994
5226750 Offshore drilling platform support Jul. 13, 1993
5125769 Floatable structure Jun. 30, 1992
5098219 Mobile submersible caisson for underwater oil-well drilling and production Mar. 24, 1992
4969776 Offshore platforms Nov. 13, 1990
4963058 Protective barrier for the protection of offshore marine works, and method of installation of the same Oct. 16, 1990
4907912 Submersible production storage barge and method for transporting and installing a jack-up rig in a body of water Mar. 13, 1990
4906138 Gravity base structure for an offshore platform in arctic regions Mar. 6, 1990
4808036 Mobile marine operations structure Feb. 28, 1989
4784527 Modular drilling template for drilling subsea wells Nov. 15, 1988
4767238 Method of accurately positioning a prefabricated structure on the sea bed or on a river bed by grounding, and a sea or a river construction obtained by said method Aug. 30, 1988
4695194 Mobile marine operations structure Sep. 22, 1987
4674919 Off-shore platform structure Jun. 23, 1987
4674916 Offshore platform designed in particular to constitute a pleasure center Jun. 23, 1987
4624645 Rapid deployment mooring and discharge system and method Nov. 25, 1986
4610569 Hybrid offshore structure Sep. 9, 1986
4606674 Structural wheel element Aug. 19, 1986
4576519 Offshore platform base Mar. 18, 1986
4543014 Off-shore mooring structure Sep. 24, 1985
4534678 Offshore structure and method of constructing same Aug. 13, 1985
4522532 Bottom-seated portable cofferdam and method of use Jun. 11, 1985
4498412 Offshore platform Feb. 12, 1985
4484841 Offshore platform structure for artic waters Nov. 27, 1984
4456402 Method for increasing the stability of an artificial island by means of pre-loading Jun. 26, 1984
4448570 Method of constructing a concrete off-shore structure more than 200 m high stabilized on the sea bed by its own weight May. 15, 1984
4425055 Two-section arctic drilling structure Jan. 10, 1984
4422803 Stacked concrete marine structure Dec. 27, 1983
4387660 Single point mooring Jun. 14, 1983
4303352 Method for the building and putting in place of a sea platform with a gravity resting base, and means for implementing such a method Dec. 1, 1981

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